The URL can be used to link to this page

Home My WebLink AboutAPA64ARLISAlaskaResourcesLibrary&InformationServicesAnch~..•\"'askaALASKAPOWERAUTHORITYSUSITNAHYDROELECTRICPROJECTTASK5 -GEOTECHNICALEXPLORATION1980GEOTECHNICALREPORTJUNE1981ACRESAMERICANINCORPORATED1000LibertyBankBuildingMainatCourtBuffalo,NewYork14202Telephone:(716)853-7525ARLISAlaskaResourcesLibrary&InformationServicesAnch~..•\"'askaALASKAPOWERAUTHORITYSUSITNAHYDROELECTRICPROJECTTASK5 -GEOTECHNICALEXPLORATION1980GEOTECHNICALREPORTJUNE1981ACRESAMERICANINCORPORATED1000LibertyBankBuildingMainatCourtBuffalo,NewYork14202Telephone:(716)853-7525 iiiivPOWERAUTHORITYHYDROELECTRICPROJECT-GEOTECHNICALEXPLORATIONASKS5.01-5.04RTON1980STUDIESOFCONTENTSTABLESFIGURESINTRODUCTION1.1-Background•...•.•••••..•..•.•.•..•....•.....•.•.........1-11.2ProjectDescriptionandLocation..•.......•.•....•......1-11.3PlanofStudy1-21.4ReportContents•....•..•...•....•......••••..•...•.••...1-41.5Acknowledgments..••..••..•...••...•.•.•...•...•....••...1-5SUMMARYANDCONCLUSIONS.1-Introduction••.••.•..•.•.••..•.•.•..•.•......•••.......2-12.2-WatanaSite............................................2-12.3-DevilCanyonSite••.•..•..•...............•..•..•••...•2-3REVIEWOFPREVIOUSWORK3.1-Introduction.•..•..•..••.•...•.••...•....••.....•...••.3-13.2-Watana.................................................3-13.3 -Devi1Canyon•.•.....•..•..•••.•.••.•...•..•....•.•...•.3-23.4-Conclusions............................................3-3REGIONALGEOLOGY4.1-General...•••..••.•...•.•.•...•.....••............•....4-14.2-GeologicSetting•.•.•.•.....•......•..•...............4-14.3-TectonicHistory4-14.4-GlacialHistory4-21980GEOTECHNICALINVESTIGATION5.1-Approach..•.•••....•••.............•.•.........•.•.•.••5-15.2-ScopeandMethodology..................................5-2RESULTSOFTHEGEOTECHNICALINVESTIGATIONS6.1-Watana.................................................6-16.2-DevilCanyon......•.•.......••......•....•.•....•......6-16iiiivPOWERAUTHORITYHYDROELECTRICPROJECT-GEOTECHNICALEXPLORATIONASKS5.01-5.04RTON1980STUDIESOFCONTENTSTABLESFIGURESINTRODUCTION1.1-Background•...•.•••••..•..•.•.•..•....•.....•.•.........1-11.2ProjectDescriptionandLocation..•.......•.•....•......1-11.3PlanofStudy1-21.4ReportContents•....•..•...•....•......••••..•...•.••...1-41.5Acknowledgments..••..••..•...••...•.•.•...•...•....••...1-5SUMMARYANDCONCLUSIONS.1-Introduction••.••.•..•.•.••..•.•.•..•.•......•••.......2-12.2-WatanaSite............................................2-12.3-DevilCanyonSite••.•..•..•...............•..•..•••...•2-3REVIEWOFPREVIOUSWORK3.1-Introduction.•..•..•..••.•...•.••...•....••.....•...••.3-13.2-Watana.................................................3-13.3 -Devi1Canyon•.•.....•..•..•••.•.••.•...•..•....•.•...•.3-23.4-Conclusions............................................3-3REGIONALGEOLOGY4.1-General...•••..••.•...•.•.•...•.....••............•....4-14.2-GeologicSetting•.•.•.•.....•......•..•...............4-14.3-TectonicHistory4-14.4-GlacialHistory4-21980GEOTECHNICALINVESTIGATION5.1-Approach..•.•••....•••.............•.•.........•.•.•.••5-15.2-ScopeandMethodology..................................5-2RESULTSOFTHEGEOTECHNICALINVESTIGATIONS6.1-Watana.................................................6-16.2-DevilCanyon......•.•.......••......•....•.•....•......6-16 ALASKAPOWERAUTHORITYSUSITNAHYDROELECTRICPROJECTTASK5 -GEOTECHNICALEXPLORATIONSUBTASKS5.01-5.04REPORTON1980STUDIESTABLEOFCONTENTS(Cont1d)BIBLIOGRAPHYAPPENDIXA-SELECTEDBIBLIOGRAPHYOFPREVIOUSINVESTIGATIONSB-DIAMONDCOREDRILLINGB-1WatanaReportsB-2DevilCanyonReportsB-3WaterPressureTestingDetailsC-BORROWAREAINVESTIGATIONSC-1AugerDrillingReportsC-2LaboratoryTestDatao-SEISMICREFRACTIONSURVEY0-1SeismicRefractionSurvey,Summer1980E -GEOPHYSICALLOGGINGE-1F -AIRPHOTOINTERPRETATIONF-1i iALASKAPOWERAUTHORITYSUSITNAHYDROELECTRICPROJECTTASK5 -GEOTECHNICALEXPLORATIONSUBTASKS5.01-5.04REPORTON1980STUDIESTABLEOFCONTENTS(Cont1d)BIBLIOGRAPHYAPPENDIXA-SELECTEDBIBLIOGRAPHYOFPREVIOUSINVESTIGATIONSB-DIAMONDCOREDRILLINGB-1WatanaReportsB-2DevilCanyonReportsB-3WaterPressureTestingDetailsC-BORROWAREAINVESTIGATIONSC-1AugerDrillingReportsC-2LaboratoryTestDatao-SEISMICREFRACTIONSURVEY0-1SeismicRefractionSurvey,Summer1980E -GEOPHYSICALLOGGINGE-1F -AIRPHOTOINTERPRETATIONF-1i i LISTOFTABLES2.1SummaryofGeotechnicalInvestigations3.1SummaryofPreviousDrilling-Watana3.2SummaryofPreviousDrilling-DevilCanyon4.1GeologicTimeScale5.1SummaryofDiamondDrillingActivity-1980.2SummaryofAugerDrillingActivity-1980.3SummaryofLaboratoryTesting.1Watana-JointCharacteristics.2Watana-BoreholeRockQualityDistribution.3DevilCanyon-JointCharacteristics.4DevilCanyon-BoreholeRockQualityDistributioniiiLISTOFTABLES2.1SummaryofGeotechnicalInvestigations3.1SummaryofPreviousDrilling-Watana3.2SummaryofPreviousDrilling-DevilCanyon4.1GeologicTimeScale5.1SummaryofDiamondDrillingActivity-1980.2SummaryofAugerDrillingActivity-1980.3SummaryofLaboratoryTesting.1Watana-JointCharacteristics.2Watana-BoreholeRockQualityDistribution.3DevilCanyon-JointCharacteristics.4DevilCanyon-BoreholeRockQualityDistributioniii LISTOFFIGURES1.1LocationofDamSites3.1Watana-PreviousExplorationMap3.2DevilCanyon-PreviousExplorationMap4.1RegionalGeology5.1Watana-1980ExplorationMap5.2DevilCanyon-1980ExplorationMap5.3TypicalInstrumentationInstallation-WatanaBH-6andDevilCanyonBH-25.4TypicalInstrumentationInstallation-DevilCanyonBH-1andBH-46.1Watana-ExplorationLocationMap6.2Watana-OverburdenIsopachMap6.3Watana-GeologicMap(2sheets)6.4Watana-SiteExplorationMap6.5Watana-GeologicCrossSections6.6Watana-JointContourPlotsaJointPlottingMethodbStationWJ-1cStationWJ-2dStationWJ-3eStationWJ-4fStationWJ~5·gStationWJ-6hStationWJ-7iStationWJ-8jStationWJ-9kStationWJ-101Composite6.7WatanaDamSite-SubsurfaceTemperatureMeasurements6.8WatanaRelictChannelArea-SubsurfaceTemperatureMeasurementsivLISTOFFIGURES1.1LocationofDamSites3.1Watana-PreviousExplorationMap3.2DevilCanyon-PreviousExplorationMap4.1RegionalGeology5.1Watana-1980ExplorationMap5.2DevilCanyon-1980ExplorationMap5.3TypicalInstrumentationInstallation-WatanaBH-6andDevilCanyonBH-25.4TypicalInstrumentationInstallation-DevilCanyonBH-1andBH-46.1Watana-ExplorationLocationMap6.2Watana-OverburdenIsopachMap6.3Watana-GeologicMap(2sheets)6.4Watana-SiteExplorationMap6.5Watana-GeologicCrossSections6.6Watana-JointContourPlotsaJointPlottingMethodbStationWJ-1cStationWJ-2dStationWJ-3eStationWJ-4fStationWJ~5·gStationWJ-6hStationWJ-7iStationWJ-8jStationWJ-9kStationWJ-101Composite6.7WatanaDamSite-SubsurfaceTemperatureMeasurements6.8WatanaRelictChannelArea-SubsurfaceTemperatureMeasurementsiv LISTOFFIGURES(Cont'd)6.9Watana-PotentialBorrowAreas6.10DevilCanyon-ExplorationLocationMap6.11DevilCanyon-OverburdenIsopachMap6.12Devi1Canyon-GeologicMap6.13DevilCanyon-GeologicCrossSection6.14DevilCanyon-JointStereographicPlotsaStationDCJ-1bStationDCJ-2cStationDCJ-3dStationDCJ-4vLISTOFFIGURES(Cont'd)6.9Watana-PotentialBorrowAreas6.10DevilCanyon-ExplorationLocationMap6.11DevilCanyon-OverburdenIsopachMap6.12Devi1Canyon-GeologicMap6.13DevilCanyon-GeologicCrossSection6.14DevilCanyon-JointStereographicPlotsaStationDCJ-1bStationDCJ-2cStationDCJ-3dStationDCJ-4v -BackgroundSusitnaHydroelectricProjectislocatedwithintheupperreachesofthetnaRiverbasininsouth-centralAlaska.Thecurrentfeasibilitystudiesh\/(1~~I~lectricdevelopmentarebeingperformedbyAcresAmericanIncorporated)undercontracttotheAlaskaPowerAuthority(APA).overallobjectivesofthestudyare:establishtechnical,economicandfinancialfeasibilityoftheSusitnatomeetthefuturepowerneedsoftheRailbeltRegionoftheStateofToevaluatetheenvironmentalconsequencesofdesigningandconstructingtheSusitnaProject;TofilealicenseapplicationwiththeFederalEnergyRegulatoryCommission(FERC)shouldtheprojectbedeemedfeasible.partofthePlanofStudy(PaS)acomprehensiveprogramofgeotechnicallorationisbeingundertakenattheproposedprojectlocation.Thepurposethisreportistopresenttheresultsofgeotechnicalworkundertakenin-ProjectDescriptionandLocationGeotechnicalInvestigations,Task5,isanimportantelementofthisstudy.thePOSincludesevaluationoftheentirebasinforpotentialectricdevelopmentbyevaluatingtherelativemeritsofseveralsites,geotechnicalinvestigationsweredirectedforatwodamscheme.ThisschemedeterminedtobetheoptimumastheresultofpreviousinvestigationsbytheS.ArmyCorpsofEngineers(CaE)andtheU.S.BureauofReclamation(USBR)aperiodofyearsfrom1955to1979.TheschemecallsforalargerockfillwithpowerhouseatWatana,andarelativelyhighconcretedamwithpowerhouseattheDevi1Canyonsite.Theareaofstudyi·slocatedthintheCoastalTroughProvinceofsouth-centralAlaska,withadrainageof~nn~nvimately6,000squaremiles.TheSusitnaRiverisglacier-fed,withonthesouthernslopeoftheAlaskaRange,anarmoftheGulfofaska.FromitsproglacialchannelintheAlaskaRange,theSusitnaRiverpassesfirstthroughabroadglaciated,intermontanevalleyofknobandkettleandbraidedchanneltopography.SwingingwestwardalongtheedgeoftheCopperRiverlowlands,itentersthedeepV-shapedvalleysoftheproposeddamsites,ndingthroughtheTalkeetnaMountainsuntilitemergesintoabroadglacialvalleyleadingtoCookInlet(Figure1.1).TheWatanasiteislocatedatapproximatelyrivermile165.Atransmissionlineapproximately365mileslongisplannedtoconnecttheproposeddevelopmentwiththeexistingpowergridsatFairbanksandAnchorage.TheWatanadamsiteis1-1-BackgroundSusitnaHydroelectricProjectislocatedwithintheupperreachesofthetnaRiverbasininsouth-centralAlaska.Thecurrentfeasibilitystudiesh\/(1~~I~lectricdevelopmentarebeingperformedbyAcresAmericanIncorporated)undercontracttotheAlaskaPowerAuthority(APA).overallobjectivesofthestudyare:establishtechnical,economicandfinancialfeasibilityoftheSusitnatomeetthefuturepowerneedsoftheRailbeltRegionoftheStateofToevaluatetheenvironmentalconsequencesofdesigningandconstructingtheSusitnaProject;TofilealicenseapplicationwiththeFederalEnergyRegulatoryCommission(FERC)shouldtheprojectbedeemedfeasible.partofthePlanofStudy(PaS)acomprehensiveprogramofgeotechnicallorationisbeingundertakenattheproposedprojectlocation.Thepurposethisreportistopresenttheresultsofgeotechnicalworkundertakenin-ProjectDescriptionandLocationGeotechnicalInvestigations,Task5,isanimportantelementofthisstudy.thePOSincludesevaluationoftheentirebasinforpotentialectricdevelopmentbyevaluatingtherelativemeritsofseveralsites,geotechnicalinvestigationsweredirectedforatwodamscheme.ThisschemedeterminedtobetheoptimumastheresultofpreviousinvestigationsbytheS.ArmyCorpsofEngineers(CaE)andtheU.S.BureauofReclamation(USBR)aperiodofyearsfrom1955to1979.TheschemecallsforalargerockfillwithpowerhouseatWatana,andarelativelyhighconcretedamwithpowerhouseattheDevi1Canyonsite.Theareaofstudyi·slocatedthintheCoastalTroughProvinceofsouth-centralAlaska,withadrainageof~nn~nvimately6,000squaremiles.TheSusitnaRiverisglacier-fed,withonthesouthernslopeoftheAlaskaRange,anarmoftheGulfofaska.FromitsproglacialchannelintheAlaskaRange,theSusitnaRiverpassesfirstthroughabroadglaciated,intermontanevalleyofknobandkettleandbraidedchanneltopography.SwingingwestwardalongtheedgeoftheCopperRiverlowlands,itentersthedeepV-shapedvalleysoftheproposeddamsites,ndingthroughtheTalkeetnaMountainsuntilitemergesintoabroadglacialvalleyleadingtoCookInlet(Figure1.1).TheWatanasiteislocatedatapproximatelyrivermile165.Atransmissionlineapproximately365mileslongisplannedtoconnecttheproposeddevelopmentwiththeexistingpowergridsatFairbanksandAnchorage.TheWatanadamsiteis1-1 locatedinarelativelybroadU-shapedvalleyrisinginsteps,withthesteeplowerportionbreakingintosomewhatflatterslopesandbecomingmuchgentlernearthetop.Accesstothelowersectionsisverylimitedduetoverticalrockoutcrops.However,therearesomesmallgravelbarswhichcanbequitewideatlowwaterlevel.TheproposeddamislocatedbetweenTsusenaCreekandDeadmanCreek.TheriveratthissiteiswiderthanatDevilCanyon,butthewaterisrelativelyturbulentandswiftflowing.TheDevilCanyonsiteislocatedontheSusitnaRiver14milesupstreamfromtheAlaskanRailroad,140milesnorthofAnchorage,and160milessouthofFair-banks.Thesiteislocatedatapproximatelyrivermile133(32rivermilesdownstreamoftheWatanasite).AttheDevilCanyonsite,theriverentersaverynarrowgorgeabouttwomilesinlengthwithsteepwallsupto600feethigh.ThedamsiteislocatedseveralhundredfeetdownstreamoftheentranceofDevilCanyon.Thevalleyisgenerallyasymmetricalinshape,withthenorthabutmentslopingatabout45°andthesouthabutmentsteeperatabout60°.Thesouthabutmentdisplaysoverhangingcliffsanddetachedblocksofrock,andwhilethenorthabutmentissomewhatlessruggedintheupperhalf,thelowerportionisverysteep.Accessatriverlevelisverylimited,butnarrowbenchesareaccessibleatlowwaterlevels.TheSusitnaRiverinDevilCanyonisapproximately150feetwideandveryturbulent.Thecanyonitselfisapproximately1,000feetwideattheproposeddamcrestelevation.1.3-PlanofStudy(a)ObjectivesTheobjectivesoftheTask5studiesaretodeterminethesurfaceandsub-surfacegeologyandgeotechnicalconditionsforthefeasibilityof:- Alargerockfilldam,powerhouse(undergroundorsurface)andassociatedstructuresatWatanasite;- AconcretedamoralternativestructurewithundergroundpowerhouseandassociatedstructuresatDevilCanyonsite;-Transmissionlinestoconnecttheproposeddevelopmentwiththeexistingpowergridsystemand;-Accessroadstotheproposeddevelopment.Inaddition,therivercanyonreacheswhichwouldbefloodedbythepro-posedreservoirswillbestudiedtodeterminepotentialareasofinsta-bility,andtoidentifythemajorgeologicalfeaturesthatcouldaffectthefeasibilityoftheprojects.(b)ScopeThetaskwassubdividedintoaseriesofsubtaskstomeettheoverallobjectives.Thesubtasksandtheircorrespondingobjectiveswere:1-2locatedinarelativelybroadU-shapedvalleyrisinginsteps,withthesteeplowerportionbreakingintosomewhatflatterslopesandbecomingmuchgentlernearthetop.Accesstothelowersectionsisverylimitedduetoverticalrockoutcrops.However,therearesomesmallgravelbarswhichcanbequitewideatlowwaterlevel.TheproposeddamislocatedbetweenTsusenaCreekandDeadmanCreek.TheriveratthissiteiswiderthanatDevilCanyon,butthewaterisrelativelyturbulentandswiftflowing.TheDevilCanyonsiteislocatedontheSusitnaRiver14milesupstreamfromtheAlaskanRailroad,140milesnorthofAnchorage,and160milessouthofFair-banks.Thesiteislocatedatapproximatelyrivermile133(32rivermilesdownstreamoftheWatanasite).AttheDevilCanyonsite,theriverentersaverynarrowgorgeabouttwomilesinlengthwithsteepwallsupto600feethigh.ThedamsiteislocatedseveralhundredfeetdownstreamoftheentranceofDevilCanyon.Thevalleyisgenerallyasymmetricalinshape,withthenorthabutmentslopingatabout45°andthesouthabutmentsteeperatabout60°.Thesouthabutmentdisplaysoverhangingcliffsanddetachedblocksofrock,andwhilethenorthabutmentissomewhatlessruggedintheupperhalf,thelowerportionisverysteep.Accessatriverlevelisverylimited,butnarrowbenchesareaccessibleatlowwaterlevels.TheSusitnaRiverinDevilCanyonisapproximately150feetwideandveryturbulent.Thecanyonitselfisapproximately1,000feetwideattheproposeddamcrestelevation.1.3-PlanofStudy(a)ObjectivesTheobjectivesoftheTask5studiesaretodeterminethesurfaceandsub-surfacegeologyandgeotechnicalconditionsforthefeasibilityof:- Alargerockfilldam,powerhouse(undergroundorsurface)andassociatedstructuresatWatanasite;- AconcretedamoralternativestructurewithundergroundpowerhouseandassociatedstructuresatDevilCanyonsite;-Transmissionlinestoconnecttheproposeddevelopmentwiththeexistingpowergridsystemand;-Accessroadstotheproposeddevelopment.Inaddition,therivercanyonreacheswhichwouldbefloodedbythepro-posedreservoirswillbestudiedtodeterminepotentialareasofinsta-bility,andtoidentifythemajorgeologicalfeaturesthatcouldaffectthefeasibilityoftheprojects.(b)ScopeThetaskwassubdividedintoaseriesofsubtaskstomeettheoverallobjectives.Thesubtasksandtheircorrespondingobjectiveswere:1-2 Subtask5.01-DataCollectionandReview5.02-Photointerpretation5.03-ExploratoryProgramDesign(1980)5.04-ExploratoryProgram(1980)5.05-ExploratoryProgramDesign(1981)5.06-ExplorationProgram(1981)ObjectivesTocollectandreviewallexistinggeologicalandgeotechnicaldatapertainingtotheSusitnaProjectincludingtheaccessroadandtrans-missionlinecorridorsandtheupperSusitnaRiverbasin-PerformairphotointerpretationandterrainanalysisoftheWatanaandDevilCanyondamsiteareas,reser-voirareas,constructionmaterialborrowareasandaccessroadandtransmissionlinecorridors,andidentifyadversegeologicalfeaturesandgeotechnicalconditionsthatcouldsignificantlyaffectthedesignandconstructionofprojectfeatures-Designthegeotechnicalexploratoryinvestigationprogramsfor1980forWatanaandDevilCanyondamsites,damconstructionmaterials,andres-ervoirareas,andalongtheaccessroadroute-Performinitialsurfaceandsubsur-faceinvestigationsatWatanaandDevilCanyonsitesandreservoirareasandaccessroadroutestoes-tablishgeneralandspecificgeologi-calandfoundationconditions-Designthegeotechnicalexploratoryinvestigationprogramsfor1981forWatanaandDevilCanyondamsites,damconstructionmaterialsandreser-voirareas,andfortheselectedac-cessroadandtransmissionlineroutes-CompletesurfaceandsubsurfaceinvestigationsatWatanaandDevilCanyondamsites,reservoirareas,accessroadsandtransmissionlineroutestotheextentnecessarytoprovideadequatedatatoconfirmprojectfeasibilityandforsubmis-sionofFERClicenseapplication,currentlyscheduledforJune,19821-3Subtask5.01-DataCollectionandReview5.02-Photointerpretation5.03-ExploratoryProgramDesign(1980)5.04-ExploratoryProgram(1980)5.05-ExploratoryProgramDesign(1981)5.06-ExplorationProgram(1981)ObjectivesTocollectandreviewallexistinggeologicalandgeotechnicaldatapertainingtotheSusitnaProjectincludingtheaccessroadandtrans-missionlinecorridorsandtheupperSusitnaRiverbasin-PerformairphotointerpretationandterrainanalysisoftheWatanaandDevilCanyondamsiteareas,reser-voirareas,constructionmaterialborrowareasandaccessroadandtransmissionlinecorridors,andidentifyadversegeologicalfeaturesandgeotechnicalconditionsthatcouldsignificantlyaffectthedesignandconstructionofprojectfeatures-Designthegeotechnicalexploratoryinvestigationprogramsfor1980forWatanaandDevilCanyondamsites,damconstructionmaterials,andres-ervoirareas,andalongtheaccessroadroute-Performinitialsurfaceandsubsur-faceinvestigationsatWatanaandDevilCanyonsitesandreservoirareasandaccessroadroutestoes-tablishgeneralandspecificgeologi-calandfoundationconditions-Designthegeotechnicalexploratoryinvestigationprogramsfor1981forWatanaandDevilCanyondamsites,damconstructionmaterialsandreser-voirareas,andfortheselectedac-cessroadandtransmissionlineroutes-CompletesurfaceandsubsurfaceinvestigationsatWatanaandDevilCanyondamsites,reservoirareas,accessroadsandtransmissionlineroutestotheextentnecessarytoprovideadequatedatatoconfirmprojectfeasibilityandforsubmis-sionofFERClicenseapplication,currentlyscheduledforJune,19821-3 5.07-ExploratoryProgramDesign(1982-1984)5.08-DataCompilation(c)Approach-Designofthegeotechnicalprogramexploratoryinvestigationsprogramfor1982to1984toobtainbasicdesigndataforWatanadamsite,damconstructionmaterialsandreservoirarea,andfortheselectedaccessroadandtransmissionlineroutes-Assembleallgeotechnicalexploratorydataintodocumentssuitableforin-clusioninrelevantprojectreportsandlicensingdocumentationTomeettheobjectivesofthetaskinanorderlyandtimelymanner,thegeotechnicalexploratoryprogramsaredividedintothreestages,i.e.the1980activities,1981activitiesandtheactivitiesduringandafter1982(aftertheFERClicenseapplicationissubmitted).The1980geotechnicalactivitieswereplannedtoidentifyandinvestigateinlimiteddetailthosegeologicalandgeotechnicalconditionswhichhavebeenidentifiedbypre-viousinvestigatorsandwhichcouldsignificantlyaffectthefeasibilityoftheproject.Thescopeoffieldinvestigationswas,therefore,limitedinnature.TheseactivitiesincludedSubtasks5.01through5.04.Thema-terialinvestigatedinSubtask5.01issummarizedasAppendixA.Subtask5.02,undertakenbyR&MConsultants,hasbeensubmittedforreviewandwillbepublishedasAppendixF.Subtasks5.05through5.07aretobeundertakenduring1981andearly1982,respectively.Undertheseactivities,amoredetailedstudywillbemadeofthosegeologicalandgeotechnicalconditionsidentifiedduring1980studies.Also,theexplorationsfortheaccessroadsandthetransmissionlineswillbeundertakenunderthesesubtasks.Itshouldbenotedthattheresultspresentedinthisreportarepreli-minaryandaresubjecttorevisiondependingontheresultsoffuturein-vestigations.Inparticular,thegeologichistoryofthisregionisverycomplexanditisnotpossibleatthistimetofullydefinethesitegeologyonthebasisoftherelativelylimitedavailabledata.Thecon-clusionsdrawnareverygeneralandareintendedtobeusedforworkofapreliminarylayoutandengineeringfeasibilitynature.AmorecompleteevaluationwillbedevelopedafterthecompletionofSubtasks5.05through5.08.1.4-ReportContentsAsummaryandpreliminaryconclusionsoftheTask5studiestodatearepre-sentedinSection2ofthisreport.AreviewofpreviousworkundertakenbytheCOE,USSRandothersispresentedinSection3,andapreliminaryassessmentofregionalgeologyisinSection4.Thescopeofthe1980geotechnicalexplora-tionprogramispresentedinSection5,withthereviewoftheresultsinSection6.Detailedresultsofdrilling,testing,seismicrefractionsurveys,airphotointrepretationandgeophysicalloggingperformedin1980areincludedinAppendicesAthroughF.1-45.07-ExploratoryProgramDesign(1982-1984)5.08-DataCompilation(c)Approach-Designofthegeotechnicalprogramexploratoryinvestigationsprogramfor1982to1984toobtainbasicdesigndataforWatanadamsite,damconstructionmaterialsandreservoirarea,andfortheselectedaccessroadandtransmissionlineroutes-Assembleallgeotechnicalexploratorydataintodocumentssuitableforin-clusioninrelevantprojectreportsandlicensingdocumentationTomeettheobjectivesofthetaskinanorderlyandtimelymanner,thegeotechnicalexploratoryprogramsaredividedintothreestages,i.e.the1980activities,1981activitiesandtheactivitiesduringandafter1982(aftertheFERClicenseapplicationissubmitted).The1980geotechnicalactivitieswereplannedtoidentifyandinvestigateinlimiteddetailthosegeologicalandgeotechnicalconditionswhichhavebeenidentifiedbypre-viousinvestigatorsandwhichcouldsignificantlyaffectthefeasibilityoftheproject.Thescopeoffieldinvestigationswas,therefore,limitedinnature.TheseactivitiesincludedSubtasks5.01through5.04.Thema-terialinvestigatedinSubtask5.01issummarizedasAppendixA.Subtask5.02,undertakenbyR&MConsultants,hasbeensubmittedforreviewandwillbepublishedasAppendixF.Subtasks5.05through5.07aretobeundertakenduring1981andearly1982,respectively.Undertheseactivities,amoredetailedstudywillbemadeofthosegeologicalandgeotechnicalconditionsidentifiedduring1980studies.Also,theexplorationsfortheaccessroadsandthetransmissionlineswillbeundertakenunderthesesubtasks.Itshouldbenotedthattheresultspresentedinthisreportarepreli-minaryandaresubjecttorevisiondependingontheresultsoffuturein-vestigations.Inparticular,thegeologichistoryofthisregionisverycomplexanditisnotpossibleatthistimetofullydefinethesitegeologyonthebasisoftherelativelylimitedavailabledata.Thecon-clusionsdrawnareverygeneralandareintendedtobeusedforworkofapreliminarylayoutandengineeringfeasibilitynature.AmorecompleteevaluationwillbedevelopedafterthecompletionofSubtasks5.05through5.08.1.4-ReportContentsAsummaryandpreliminaryconclusionsoftheTask5studiestodatearepre-sentedinSection2ofthisreport.AreviewofpreviousworkundertakenbytheCOE,USSRandothersispresentedinSection3,andapreliminaryassessmentofregionalgeologyisinSection4.Thescopeofthe1980geotechnicalexplora-tionprogramispresentedinSection5,withthereviewoftheresultsinSection6.Detailedresultsofdrilling,testing,seismicrefractionsurveys,airphotointrepretationandgeophysicalloggingperformedin1980areincludedinAppendicesAthroughF.1-4 -AcknowledgmentsialpresentedinthisreporthasbeenobtainedfromreportspreviouslyshedbytheUSBRandtheCaE.ThecooperationoftheCOEinprovidingstorecordsanddataandopinionsoninterpretationisgratefullyedged.ingatthesiteswasperformedunderthedirectsupervisionanddirectionstaff,bytheDrillingCompanyundersubcontracttoR&MConsultantsofAnl:nclrage,Alaska.SeismicrefractionsurveyswereperformedbyWoodward-Clydetants,alsoundersubcontracttoR&MConsultants.In-holegeophysical~n",~,nworkwasperformedbyEDCON(ExplorationDataConsultants,Inc.,ofnA....~.~,Colorado)undersubcontracttoR&MConsultants.AirphotointerpretationbyR&MConsultants.AllworkundertakenbyR&M,directlyorsutlcolntracted,wasdirectedbyAcres.icalsupportduringfieldactivitieswasprovidedbyKNIK/ADC-Joint\I~~'TII"OunderitssubcontractwithCookInletRegion,Inc./Holmes&Narver,Inc.forcampaccommodations,andbyAklandHelicoptersandERA~n'~T~'~s,alsoundersubcontractwithAcresforpersonnelandequipmentthimspoy'tationrequirements.tsoftheseactivitieswerepresentedtotheAcresExternalReview(Dr.Peck,Dr.Hendron,Mr.Copen),toAPA,andtotheAPAReviewBoardMerrlbel"S(Dr.Seed,Dr.Merritt)duringtechnicalmeetingsanddiscussions.isverygratefulfortheircriticalandveryobjectivereviewofthenTr,~m;'Tion.ThanksareduetoMr.RivardforhiscontributionstoSubtask5.02Photointerpretation.1-5-AcknowledgmentsialpresentedinthisreporthasbeenobtainedfromreportspreviouslyshedbytheUSBRandtheCaE.ThecooperationoftheCOEinprovidingstorecordsanddataandopinionsoninterpretationisgratefullyedged.ingatthesiteswasperformedunderthedirectsupervisionanddirectionstaff,bytheDrillingCompanyundersubcontracttoR&MConsultantsofAnl:nclrage,Alaska.SeismicrefractionsurveyswereperformedbyWoodward-Clydetants,alsoundersubcontracttoR&MConsultants.In-holegeophysical~n",~,nworkwasperformedbyEDCON(ExplorationDataConsultants,Inc.,ofnA....~.~,Colorado)undersubcontracttoR&MConsultants.AirphotointerpretationbyR&MConsultants.AllworkundertakenbyR&M,directlyorsutlcolntracted,wasdirectedbyAcres.icalsupportduringfieldactivitieswasprovidedbyKNIK/ADC-Joint\I~~'TII"OunderitssubcontractwithCookInletRegion,Inc./Holmes&Narver,Inc.forcampaccommodations,andbyAklandHelicoptersandERA~n'~T~'~s,alsoundersubcontractwithAcresforpersonnelandequipmentthimspoy'tationrequirements.tsoftheseactivitieswerepresentedtotheAcresExternalReview(Dr.Peck,Dr.Hendron,Mr.Copen),toAPA,andtotheAPAReviewBoardMerrlbel"S(Dr.Seed,Dr.Merritt)duringtechnicalmeetingsanddiscussions.isverygratefulfortheircriticalandveryobjectivereviewofthenTr,~m;'Tion.ThanksareduetoMr.RivardforhiscontributionstoSubtask5.02Photointerpretation.1-5 LOCATION200I ;SCALEINMILESOFDAMSITES20;FIGURELOCATION200I ;SCALEINMILESOFDAMSITES20;FIGURE ANDCONCLUSIONSandpreliminaryconclusionspresentedhereinarebasedonareviewiousinvestigationscompletedbyotheragenciesandthedatadevelopedbyduring1980.Itisemphasizedthattheconclusionspresentedaresubjectisionsfollowingfurtherstudiestobeperformedin1981.n~l~h~'nsivefieldexplorationprogramswereundertakenatWatanabytheCorpsneersin1978andAcresin1980,andatDevilCanyonbytheUSBRinthesandAcresin1980.ThescopeoftheseprogramsisindicatedinTableWatanaSiteResultsefollowingtechnicalconditionshavebeenidentifiedregardingthedamsite:Thedamsiteisunderlainprincipallybyadiorite/quartzdioriteintrusiverockwhichispartiallyoverlainbyanextrusiveandesiticrockexposeddownstreamoftheproposeddamaxis.Onthebasisofdrillingtodate,rockweatheringextendsupto40feetindepthbelowtopofrock.Bedrockqualityisgenerallygoodtoexcellentbelowtheweatheredzone.Twoprominentshearzones,liTheFinsllandIIFingerbusterllareexposedontherightbankupstreamanddownstreamoftheproposeddamaxis,respectively.Lackofbedrockexposureshaspreventedthemappingofthesefeaturesontheleftbanktodate.GeologicmappinginfersthecontinuationofliTheFinsllinanorthwesterlydirection,outcroppingalongTsusenaCreeknorthofthesite.Localizedshearandfracturezoneswereencounteredatvariousdepthsinseveraloftheborings.Thesezonesgenerallyrangedfrom1to30feetinthickness.Thecontactbetweentheextrusiveandesiteandthedioritewasdrilledintwoofthe1980borings.Thenatureofthiscontactisnotclearlydefinedbutappearstobeassociatedwithadecreaseinrockqualityandincreasedweatheringnearthecontact.Noevidenceofmajorfaultingwasfoundundertheriver.Therockhasonemajorandseveralminorjointsets.Themajorsetstrikesapproximately320°(N400W)withdipsrangingfrom65°NEto700SW.2-1ANDCONCLUSIONSandpreliminaryconclusionspresentedhereinarebasedonareviewiousinvestigationscompletedbyotheragenciesandthedatadevelopedbyduring1980.Itisemphasizedthattheconclusionspresentedaresubjectisionsfollowingfurtherstudiestobeperformedin1981.n~l~h~'nsivefieldexplorationprogramswereundertakenatWatanabytheCorpsneersin1978andAcresin1980,andatDevilCanyonbytheUSBRinthesandAcresin1980.ThescopeoftheseprogramsisindicatedinTableWatanaSiteResultsefollowingtechnicalconditionshavebeenidentifiedregardingthedamsite:Thedamsiteisunderlainprincipallybyadiorite/quartzdioriteintrusiverockwhichispartiallyoverlainbyanextrusiveandesiticrockexposeddownstreamoftheproposeddamaxis.Onthebasisofdrillingtodate,rockweatheringextendsupto40feetindepthbelowtopofrock.Bedrockqualityisgenerallygoodtoexcellentbelowtheweatheredzone.Twoprominentshearzones,liTheFinsllandIIFingerbusterllareexposedontherightbankupstreamanddownstreamoftheproposeddamaxis,respectively.Lackofbedrockexposureshaspreventedthemappingofthesefeaturesontheleftbanktodate.GeologicmappinginfersthecontinuationofliTheFinsllinanorthwesterlydirection,outcroppingalongTsusenaCreeknorthofthesite.Localizedshearandfracturezoneswereencounteredatvariousdepthsinseveraloftheborings.Thesezonesgenerallyrangedfrom1to30feetinthickness.Thecontactbetweentheextrusiveandesiteandthedioritewasdrilledintwoofthe1980borings.Thenatureofthiscontactisnotclearlydefinedbutappearstobeassociatedwithadecreaseinrockqualityandincreasedweatheringnearthecontact.Noevidenceofmajorfaultingwasfoundundertheriver.Therockhasonemajorandseveralminorjointsets.Themajorsetstrikesapproximately320°(N400W)withdipsrangingfrom65°NEto700SW.2-1 (ix)Overburdenthicknessisgenerallythinonthevalleywalls,andthickensawayfromthedamsitetothenorth.Overburdengenerallyconsistsofglaciallyderivedsilts,sands,gravels,bouldersandglaciallacustrineclays.(x)Depthofriveralluviumbeneaththeproposeddamaveragesapproxi-mately60feetandconsistsofsand,silt,coarsegravelsandboul-ders.ThemaximumdepthofthisoverburdeninCOEboringsBH-3andBH-4was78ft.(xi)Severallocalizedareasofdeeperoverburdenwereencounteredoneachabutment.Furtherstudiesarerequiredtomoreaccuratelydelineatetheseareas.(xii)Apossiblerelictchannelidentifiedinpreviousstudiesandrecon-firmedinthe1980programextendsfromapproximately9,000feetupstreamofthedaminageneralnorthwesterlydirectiontowardsTsusenaCreek.Thedepthofthischannelextendsupto500feetbelowgroundsurface.Furtherstudyisrequiredtodelineatethefullextentofthischannel.(xiii)ThelargestgeologictectonicfeaturemappedinthevicinityofthedamistheTalkeetnathrustfaultapproximately4milesfromthedamsite.Noevidenceofrecentfaultmovementhasbeenfound,however,furtherinvestigationofthisfeatureisplannedfor1981.ThefaultcrossestheSusitnaRiverapproximatelysevenrivermilesupstreamofthedamsite.(xiv)Permafrostconditionsexistontheleftabutment.Althoughthedepthofthepermafrosthasnotbeenfullydetermined,measurementsindicatethatitpenetratestoadepthofatleast200feet.Thereisevidencethatthegroundtemperaturesarewithinonedegreecentigradeoffreezingandthereforearemarginal.Furtherworktodelineatetheextentofpermafrostwillbeperformedduring1981.Onlysporadicpermafrostwasencounteredontherightabutment.(xv)ReconnaissancesurveysoftheWatanareservoirshowthatseveralareasalongWatanaCreekandothersmallertributariescontainthickdepositsofglaciallyderivedmaterial.(xvi)Adequatequantitiesofrockfillandsoilborrowmaterialsforembankmentconstructionhavebeenfoundwithinthedamarea.(b)ConclusionsBasedonthesefindings,thefollowingtentativeconclusionsregardingtheWatanasitecanbemade:(i)Noevidencehasbeenfoundtoindicatethatthesiteisnotgeolog-icallyandgeotechnicallyfeasiblefortheconstructionofalarge.rockfillorconcretedamandassociatedstructures.(ii)Explorationintheabutmentstodatehasencounterednoconditionswhichwouldprecludeconstructionofasuitablylocatedandoriented2-2(ix)Overburdenthicknessisgenerallythinonthevalleywalls,andthickensawayfromthedamsitetothenorth.Overburdengenerallyconsistsofglaciallyderivedsilts,sands,gravels,bouldersandglaciallacustrineclays.(x)Depthofriveralluviumbeneaththeproposeddamaveragesapproxi-mately60feetandconsistsofsand,silt,coarsegravelsandboul-ders.ThemaximumdepthofthisoverburdeninCOEboringsBH-3andBH-4was78ft.(xi)Severallocalizedareasofdeeperoverburdenwereencounteredoneachabutment.Furtherstudiesarerequiredtomoreaccuratelydelineatetheseareas.(xii)Apossiblerelictchannelidentifiedinpreviousstudiesandrecon-firmedinthe1980programextendsfromapproximately9,000feetupstreamofthedaminageneralnorthwesterlydirectiontowardsTsusenaCreek.Thedepthofthischannelextendsupto500feetbelowgroundsurface.Furtherstudyisrequiredtodelineatethefullextentofthischannel.(xiii)ThelargestgeologictectonicfeaturemappedinthevicinityofthedamistheTalkeetnathrustfaultapproximately4milesfromthedamsite.Noevidenceofrecentfaultmovementhasbeenfound,however,furtherinvestigationofthisfeatureisplannedfor1981.ThefaultcrossestheSusitnaRiverapproximatelysevenrivermilesupstreamofthedamsite.(xiv)Permafrostconditionsexistontheleftabutment.Althoughthedepthofthepermafrosthasnotbeenfullydetermined,measurementsindicatethatitpenetratestoadepthofatleast200feet.Thereisevidencethatthegroundtemperaturesarewithinonedegreecentigradeoffreezingandthereforearemarginal.Furtherworktodelineatetheextentofpermafrostwillbeperformedduring1981.Onlysporadicpermafrostwasencounteredontherightabutment.(xv)ReconnaissancesurveysoftheWatanareservoirshowthatseveralareasalongWatanaCreekandothersmallertributariescontainthickdepositsofglaciallyderivedmaterial.(xvi)Adequatequantitiesofrockfillandsoilborrowmaterialsforembankmentconstructionhavebeenfoundwithinthedamarea.(b)ConclusionsBasedonthesefindings,thefollowingtentativeconclusionsregardingtheWatanasitecanbemade:(i)Noevidencehasbeenfoundtoindicatethatthesiteisnotgeolog-icallyandgeotechnicallyfeasiblefortheconstructionofalarge.rockfillorconcretedamandassociatedstructures.(ii)Explorationintheabutmentstodatehasencounterednoconditionswhichwouldprecludeconstructionofasuitablylocatedandoriented2-2 undergroundpowerhouse.Atthistime,supportforundergroundcavernsbymeansofconventionalrockboltingandshotcretemethodsmaybeassumed.Itisnotanticipatedthatconditionswillbefoundtobesosevereastoruleoutanundergroundpowerhouse.Onthebasisofthecurrentlyavailabledata,relativelylowdensityofsandsandsiltsintheriveralluvium,andpotentialforlossofstrengthofthesematerialsunderseismicloadingisbeingassumedforthecurrentdesignstudies.iV)Foundationpreparationasenvisagedatthistimeincludes(onconser-vativeassumptions)removalofexistingalluviumandasignificantportionoftheweatheredrockunderthedam,andperformanceofcon-solidationandcurtaingrouting.Drainholesanddrainagegalleriesintheabutmentsandupstreamoftheundergroundstructuresarebeingconsideredinthepreliminarydesignstages.v)Althoughtherelictchannelonthenorthbankupstreamwarrantsfurtherstudy,itisnotanticipatedtohaveanymajorimpactonthefeasibilityoftheproject.Conventionalengineeringmethodstopre-ventseepageandassociatedphenomenonsuchaspiping,willbeinvestigatedduring1981andinsubsequentstudies.vi)Duringfillingandoperation,localslumpingandlandslidesmayoccurinthereservoirinareasofsteepslopeunderlainbydeepsoil,aswellasalongportionsofthenorthfacingslopeswhereextensivepermafrostexists.Atthistime,thesephenomenaarenotconsideredsignificantenoughtocauseseriouswaveactioninthereservoirortoendangerthesafetyofmajorstructures.DevilCanyonSiteResultstechnicalconditionshavebeenidentifiedattheDevilCanyoni)Theproposeddamsiteisunderlainbyargilliteandgraywacke(meta-morphosedsedimentaryrocks).Therockisgenerallyofgoodtoex-cellentquality.Overburdenonthevalleywallsisthintonon-existent.i)Onemajorandtwominorjointsetshavebeenmapped.Themajorsetstrikesapproximately340°(N200W)anddips85°NE.Beddingstrikessubparalleltothegorge(050-070°NE)anddipssteeply(50°_80°)tothesoutheast.Stressreliefcracksandopenjointsparalleltothegorgeextendupto100feetbackfromthecliffedges.Openjointingalsooccursalongthemajorjointset.2-3undergroundpowerhouse.Atthistime,supportforundergroundcavernsbymeansofconventionalrockboltingandshotcretemethodsmaybeassumed.Itisnotanticipatedthatconditionswillbefoundtobesosevereastoruleoutanundergroundpowerhouse.Onthebasisofthecurrentlyavailabledata,relativelylowdensityofsandsandsiltsintheriveralluvium,andpotentialforlossofstrengthofthesematerialsunderseismicloadingisbeingassumedforthecurrentdesignstudies.iV)Foundationpreparationasenvisagedatthistimeincludes(onconser-vativeassumptions)removalofexistingalluviumandasignificantportionoftheweatheredrockunderthedam,andperformanceofcon-solidationandcurtaingrouting.Drainholesanddrainagegalleriesintheabutmentsandupstreamoftheundergroundstructuresarebeingconsideredinthepreliminarydesignstages.v)Althoughtherelictchannelonthenorthbankupstreamwarrantsfurtherstudy,itisnotanticipatedtohaveanymajorimpactonthefeasibilityoftheproject.Conventionalengineeringmethodstopre-ventseepageandassociatedphenomenonsuchaspiping,willbeinvestigatedduring1981andinsubsequentstudies.vi)Duringfillingandoperation,localslumpingandlandslidesmayoccurinthereservoirinareasofsteepslopeunderlainbydeepsoil,aswellasalongportionsofthenorthfacingslopeswhereextensivepermafrostexists.Atthistime,thesephenomenaarenotconsideredsignificantenoughtocauseseriouswaveactioninthereservoirortoendangerthesafetyofmajorstructures.DevilCanyonSiteResultstechnicalconditionshavebeenidentifiedattheDevilCanyoni)Theproposeddamsiteisunderlainbyargilliteandgraywacke(meta-morphosedsedimentaryrocks).Therockisgenerallyofgoodtoex-cellentquality.Overburdenonthevalleywallsisthintonon-existent.i)Onemajorandtwominorjointsetshavebeenmapped.Themajorsetstrikesapproximately340°(N200W)anddips85°NE.Beddingstrikessubparalleltothegorge(050-070°NE)anddipssteeply(50°_80°)tothesoutheast.Stressreliefcracksandopenjointsparalleltothegorgeextendupto100feetbackfromthecliffedges.Openjointingalsooccursalongthemajorjointset.2-3 (iv)Earlierinvestigatorshavepostulatedthepossibilityofafaultontheleftabutment,parallelingtheriver.Theseismicrefractionsurveyshaveindicatedananomalousvelocityzone.Noconclusiveevidencehasbeenfoundtosupportorrefutetheexistenceofthisfeature.Additionalworkin1981willbedirectedinthisarea.(v)Thepossibilityofafaultalongtheriverchannelundertheproposeddamwaspostulatedbyearlierinvestigators.Noevidencehasbeenfoundtosupportthistheory,butthepossibilitywillbefurtherexploredduringthe1981investigations.(vi)Aseveralhundredfootstepinbedrocksurfacehadbeenreportedbyearlierinvestigatorsupstreamoftheproposeddamsite,underthealluvialfanwhereCheechakoCreekjoinstheSusitnaRiver.Thelocationofthisfeatureisapproximately1,000feetupstreamofthedamsite.(vii)Duringthe1980programnofieldmappingwasconductedtoverifytheexistenceoftheshearzonesmappedbytheUSSRsubparallelandsub-perpendiculartotheriver.Additionalworkrelativetothesefeatureswillbecarriedoutin1981.(viii)Noextensivepermafrostconditionswerefoundtoexistoneitherabutment.(ix)Riverchannelalluviumappearstobecomposedoftalusanddetachedblocksofrock,andisinferredtobeupto40feetthickundertheriver.(b)ConclusionsBasedontheabove,thefollowingtentativeconclusionshavebeenmaderegardingtheDevilCanyonsite:(i)Thesiteappearsgeologicallyandgeotechnicallyfeasiblefortheconstructionofeitheraconcretegravityorarchdam.(ii)Noevidencehasbeenfoundtosuggesttheinfeasibilityofconstruc-tionoflargeundergroundpowerfacilitiesatthesite.Furtherdetailedgeologicstudiesarerequiredtodeterminetheappropriatelocationandorientationofundergroundcaverns.(iii)Furtherinvestigationsarerequiredtoconclusivelyidentifyordis-provethepotentialexistenceofafaultalongtheriverchannel,underthedamorontheleftabutment.(iv)Onthebasisofavailabledata,itisestimatedthatfoundationtreat·mentwillincludegroutingandprovisionsfordrainageaditsanddrairholesforthedam.Extensivefoundationrockexcavationanddentalconcretewillprobablyberequiredtotreatlocalareasfortheconcretedamfoundation.2-4(iv)Earlierinvestigatorshavepostulatedthepossibilityofafaultontheleftabutment,parallelingtheriver.Theseismicrefractionsurveyshaveindicatedananomalousvelocityzone.Noconclusiveevidencehasbeenfoundtosupportorrefutetheexistenceofthisfeature.Additionalworkin1981willbedirectedinthisarea.(v)Thepossibilityofafaultalongtheriverchannelundertheproposeddamwaspostulatedbyearlierinvestigators.Noevidencehasbeenfoundtosupportthistheory,butthepossibilitywillbefurtherexploredduringthe1981investigations.(vi)Aseveralhundredfootstepinbedrocksurfacehadbeenreportedbyearlierinvestigatorsupstreamoftheproposeddamsite,underthealluvialfanwhereCheechakoCreekjoinstheSusitnaRiver.Thelocationofthisfeatureisapproximately1,000feetupstreamofthedamsite.(vii)Duringthe1980programnofieldmappingwasconductedtoverifytheexistenceoftheshearzonesmappedbytheUSSRsubparallelandsub-perpendiculartotheriver.Additionalworkrelativetothesefeatureswillbecarriedoutin1981.(viii)Noextensivepermafrostconditionswerefoundtoexistoneitherabutment.(ix)Riverchannelalluviumappearstobecomposedoftalusanddetachedblocksofrock,andisinferredtobeupto40feetthickundertheriver.(b)ConclusionsBasedontheabove,thefollowingtentativeconclusionshavebeenmaderegardingtheDevilCanyonsite:(i)Thesiteappearsgeologicallyandgeotechnicallyfeasiblefortheconstructionofeitheraconcretegravityorarchdam.(ii)Noevidencehasbeenfoundtosuggesttheinfeasibilityofconstruc-tionoflargeundergroundpowerfacilitiesatthesite.Furtherdetailedgeologicstudiesarerequiredtodeterminetheappropriatelocationandorientationofundergroundcaverns.(iii)Furtherinvestigationsarerequiredtoconclusivelyidentifyordis-provethepotentialexistenceofafaultalongtheriverchannel,underthedamorontheleftabutment.(iv)Onthebasisofavailabledata,itisestimatedthatfoundationtreat·mentwillincludegroutingandprovisionsfordrainageaditsanddrairholesforthedam.Extensivefoundationrockexcavationanddentalconcretewillprobablyberequiredtotreatlocalareasfortheconcretedamfoundation.2-4 v)Sourcesofconstructionmaterialhavebeententativelyidentifiedfortheconcreteaggregateandforconstructionofthesaddledamontheleftabutment.However,adeterminationofsuitabilityandquantitiesavailablehastobeperformedinthe1981program.2-5v)Sourcesofconstructionmaterialhavebeententativelyidentifiedfortheconcreteaggregateandforconstructionofthesaddledamontheleftabutment.However,adeterminationofsuitabilityandquantitiesavailablehastobeperformedinthe1981program.2-5 TABLE2.1-SUMMARYOFGEOTECHNICALINVESTIGATIONSAUGERTESTSEISMICDRILLINGHOLESPITLINESGEOLOGICYEAR(FT)Q1.L(NO.)(iT)MAPPING1957-58DevilCanyon197619YesNo19783300No50304102747665Yes19801908343000Yes189222624800YesU.S.ArmyCorpsofEngineers,1979(18)U.S.BureauofReclamation,1960(19)TABLE2.1-SUMMARYOFGEOTECHNICALINVESTIGATIONSAUGERTESTSEISMICDRILLINGHOLESPITLINESGEOLOGICYEAR(FT)Q1.L(NO.)(iT)MAPPING1957-58DevilCanyon197619YesNo19783300No50304102747665Yes19801908343000Yes189222624800YesU.S.ArmyCorpsofEngineers,1979(18)U.S.BureauofReclamation,1960(19) OFPREVIOUSINVESTIGATIONSoftheSusitnaHydroelectricProjecthasbeenstudiedbyseveralprivateagenciesinthelast30years.However,itwasnotuntil'sthatanygeotechnicalinvestigationswereconducted.1957andAugust1958,theUSBRperformedgeologicmappingandattheDevilCanyonsiteandlimitedgeologicmappingatduringthe1970's,theCOEperformedadditionalinvestigationsonTheseincludedseismicrefractionsurveysatDevilCanyon;andde-icmappinganddiamondandaugerdrillingatthedamsiteandhn\~~rl\"areasatWatana.brieflydiscussesthefindingsoftheseinvestigationsasdocumentedtheCOE.Thesereports,whichareidentifiedinthethissummary,areavailablefromAPAandAcresforreference.aryreconnaissanceworkbytheUSBRinthe1950'swasexpanded'sbytheCOEinvestigationsofthedamsite,reservoir,andhnl~rrlWareas.Thelocationandextentoftheseinvestigationsare3.1.of22,500linearfeetofseismicrefractionsurveywasperform-&Moore(6)fortheCOE.ThiswasexpandedbyShannon&Wilson(14)anadditional47,665feetofsurvey.Thisworkservedtosupportthedrillingandmappingprograms.season,thesitewasexploredwith28diamondandrotarydrillicalandinclined)rangingfrom30to600feetinlength(18).thisprogramispresentedinTable3.1.Sixofthediamonddrilllocatedintheriverbottomandreachedamaximumof520feetintoingsweredrilledontheleftabutmentandsixontheright,imumdepthof300feetoranelevationof1,560feet.Ontheevenboringswerelocatedinwhatwasidentifiedasadeeprelictinethethicknessandcharacteristicsoftheoverburden,thewatertable,andthepermafrostconditions.TheseholeswerealsoainsamplesofpotentialborrowmaterialsinAreaD,andtono~~nr'vdepthtocontrolspillwaylocation.borrowareasforconstructionmaterialwereidentifiedandex-26backhoetestpitsand24augerborings.FourteentestpitswereAreaDontherightbankwhichwasidentifiedasasourceofsemi-perviousmaterialfortheembankment.SixtestpitswereKn"~n,,,,AreaE,identifiedasapotentialsourceoffiltermaterialaggregate.ThisareaissituatedattheconfluenceofTsusenaSusitnaRiver,approximately15,000feetdownstreamofthedamtestpitswerelocatedinBorrowAreaFonTsusenaCreek,threemilesitsconfluencewiththeSusitnaRiver,asapotentialsourceof3-1OFPREVIOUSINVESTIGATIONSoftheSusitnaHydroelectricProjecthasbeenstudiedbyseveralprivateagenciesinthelast30years.However,itwasnotuntil'sthatanygeotechnicalinvestigationswereconducted.1957andAugust1958,theUSBRperformedgeologicmappingandattheDevilCanyonsiteandlimitedgeologicmappingatduringthe1970's,theCOEperformedadditionalinvestigationsonTheseincludedseismicrefractionsurveysatDevilCanyon;andde-icmappinganddiamondandaugerdrillingatthedamsiteandhn\~~rl\"areasatWatana.brieflydiscussesthefindingsoftheseinvestigationsasdocumentedtheCOE.Thesereports,whichareidentifiedinthethissummary,areavailablefromAPAandAcresforreference.aryreconnaissanceworkbytheUSBRinthe1950'swasexpanded'sbytheCOEinvestigationsofthedamsite,reservoir,andhnl~rrlWareas.Thelocationandextentoftheseinvestigationsare3.1.of22,500linearfeetofseismicrefractionsurveywasperform-&Moore(6)fortheCOE.ThiswasexpandedbyShannon&Wilson(14)anadditional47,665feetofsurvey.Thisworkservedtosupportthedrillingandmappingprograms.season,thesitewasexploredwith28diamondandrotarydrillicalandinclined)rangingfrom30to600feetinlength(18).thisprogramispresentedinTable3.1.Sixofthediamonddrilllocatedintheriverbottomandreachedamaximumof520feetintoingsweredrilledontheleftabutmentandsixontheright,imumdepthof300feetoranelevationof1,560feet.Ontheevenboringswerelocatedinwhatwasidentifiedasadeeprelictinethethicknessandcharacteristicsoftheoverburden,thewatertable,andthepermafrostconditions.TheseholeswerealsoainsamplesofpotentialborrowmaterialsinAreaD,andtono~~nr'vdepthtocontrolspillwaylocation.borrowareasforconstructionmaterialwereidentifiedandex-26backhoetestpitsand24augerborings.FourteentestpitswereAreaDontherightbankwhichwasidentifiedasasourceofsemi-perviousmaterialfortheembankment.SixtestpitswereKn"~n,,,,AreaE,identifiedasapotentialsourceoffiltermaterialaggregate.ThisareaissituatedattheconfluenceofTsusenaSusitnaRiver,approximately15,000feetdownstreamofthedamtestpitswerelocatedinBorrowAreaFonTsusenaCreek,threemilesitsconfluencewiththeSusitnaRiver,asapotentialsourceof3-1 granularmaterial.The24shallowaugerboringsweredrilledinBorrowAreaDbetweenTsusenaandDeadmanCreeksandrangedfrom3to59feetdeep.Nodefin-itiveestimateofavailablequantitiesofmaterialsweremadebutingeneralitisbelievedthatadequatequantitiesofavailablematerialsexistattheproposedborrowareas.Detailedgeologicmappingwasconductedinthedamsiteareatodelineatemajorstructuralfeatures.Twopotentialquarryareaswereidentifiedandreconnaissanceexplorationwasconducted.QuarryAislocatedontheupperpartoftheleftabutment,andQuarryBontherightbankrelativelyclosetotheriver.Bothareasweremappedasadioritethatcouldbeexploitedforappropriatelysizedandgradedembankmentrockfill.Alimitedlaboratorytestingprogramwasconductedonpotentialfilter,coreandembankmentmaterialsfromthevariousborrowareastoestablishtheindexesandengineeringcharacteristicsoftheborrowmaterials.Thesetestsincludedgra-dationcurves,permeability,triaxialsheartests,ModifiedProctorcompactiontestsandconcreteaggregatetests.TheCOEalsoinstalledaseriesoftenopenwellpiezometersandthirteentemp-eratureloggingdevicesintheboreholes.TheseinstrumentshadnotstabilizedbytheendoftheCOEinvestigationand,therefore,nodefiniteconclusionsweredrawn.3.3-DevilCanyonTheinvestigationsconductedattheDevilCanyonsitewerenotasextensiveasthoseatWatana.TheexplorationplanisshownonFigure3.2andsummarizedinTable3.2TheUSBRperformedthebulkofexplorationatthissitebetweenJune1957andAugust1958(19).Twenty-onediamonddrillboringsweredrilledinthedamsitearea.Sixholes,from50to110feetdeep,werelocatedintheleftabutmentwithintheproposedswitchyardareadownstreamoftheproposedsaddledamaxis.Atthedeepestpoint,rockwasencounteredat87feetbelowthesurfaceinwhatwasinterpretedasanoldburiedchannel.Threeholesweredrilledupstreamofthisareawithamaximumdepthof120feet.Theremainingtwelveholesweredrilledalongtheriverbednearthedamaxistodeterminethedepthandnatureofthebedrockunderthedam.Oneotherproposedboreholewassubsequentlyexcavatedasatestpit.Nineteentestpitswereduginthealluvialfanimmediatelyupstreamofthedamaxis.Thisareawasconsideredtobetheonlyreadilyavailablesourceofcon-creteaggregatematerialfordamconstruction,butnoestimatesofavailablequantitiesweremade.Fouradditionalbenchesweredugonthedamabutmentstodefinetherockconditionspresent.Laboratorytests,includinggradationdeterminationsandpetrographicanalysiswereconductedonsamplesoftheborrowareamaterialstodeterminetheir.suita-bilityforuseasconcreteaggregate.Representativerocksamplesfromtheabutmentsweretestedtodeterminecompressivestrength,elasticity,absorption,andporosityofthefoundationmaterial.3-2granularmaterial.The24shallowaugerboringsweredrilledinBorrowAreaDbetweenTsusenaandDeadmanCreeksandrangedfrom3to59feetdeep.Nodefin-itiveestimateofavailablequantitiesofmaterialsweremadebutingeneralitisbelievedthatadequatequantitiesofavailablematerialsexistattheproposedborrowareas.Detailedgeologicmappingwasconductedinthedamsiteareatodelineatemajorstructuralfeatures.Twopotentialquarryareaswereidentifiedandreconnaissanceexplorationwasconducted.QuarryAislocatedontheupperpartoftheleftabutment,andQuarryBontherightbankrelativelyclosetotheriver.Bothareasweremappedasadioritethatcouldbeexploitedforappropriatelysizedandgradedembankmentrockfill.Alimitedlaboratorytestingprogramwasconductedonpotentialfilter,coreandembankmentmaterialsfromthevariousborrowareastoestablishtheindexesandengineeringcharacteristicsoftheborrowmaterials.Thesetestsincludedgra-dationcurves,permeability,triaxialsheartests,ModifiedProctorcompactiontestsandconcreteaggregatetests.TheCOEalsoinstalledaseriesoftenopenwellpiezometersandthirteentemp-eratureloggingdevicesintheboreholes.TheseinstrumentshadnotstabilizedbytheendoftheCOEinvestigationand,therefore,nodefiniteconclusionsweredrawn.3.3-DevilCanyonTheinvestigationsconductedattheDevilCanyonsitewerenotasextensiveasthoseatWatana.TheexplorationplanisshownonFigure3.2andsummarizedinTable3.2TheUSBRperformedthebulkofexplorationatthissitebetweenJune1957andAugust1958(19).Twenty-onediamonddrillboringsweredrilledinthedamsitearea.Sixholes,from50to110feetdeep,werelocatedintheleftabutmentwithintheproposedswitchyardareadownstreamoftheproposedsaddledamaxis.Atthedeepestpoint,rockwasencounteredat87feetbelowthesurfaceinwhatwasinterpretedasanoldburiedchannel.Threeholesweredrilledupstreamofthisareawithamaximumdepthof120feet.Theremainingtwelveholesweredrilledalongtheriverbednearthedamaxistodeterminethedepthandnatureofthebedrockunderthedam.Oneotherproposedboreholewassubsequentlyexcavatedasatestpit.Nineteentestpitswereduginthealluvialfanimmediatelyupstreamofthedamaxis.Thisareawasconsideredtobetheonlyreadilyavailablesourceofcon-creteaggregatematerialfordamconstruction,butnoestimatesofavailablequantitiesweremade.Fouradditionalbenchesweredugonthedamabutmentstodefinetherockconditionspresent.Laboratorytests,includinggradationdeterminationsandpetrographicanalysiswereconductedonsamplesoftheborrowareamaterialstodeterminetheir.suita-bilityforuseasconcreteaggregate.Representativerocksamplesfromtheabutmentsweretestedtodeterminecompressivestrength,elasticity,absorption,andporosityofthefoundationmaterial.3-2 During1978,Shannon&Wilson(14),underCaEcontract,ranthreeseismicre-fractionlinestotaling3,300feetintheborrowareaandalongtheproposedsaddledamtoexpandthedrillinginformation.This,alongwithalluvialfanmaterialsampling,wastheonlyCaEworkperformedatthesite.3.4-ConclusionsinvestigationsconductedbytheCaEandUSBRwerethefirstdetailed~++'n~i-ctoestablishthefeasibilityoftheproject.Thereviewoftheseinves-ationsservedasthebasisforidentifyingthosegeologicalandgeotechnicalthatwereconsideredtorequirefurtherinvestigation.Abriefsummarypriorfeaturesandfindingsofthoseinvestigationsfollows.WatanaSiteTheWatanasitewasconsideredsuitableforalargerockfilldam,anunder-groundpowerhouseandancillarystructures.However,beforethefeasibil-ityisconclusivelyestablished,certainfeatureswereidentifiedwhichrequiredfurtherinvestigation.(i)Theexplorationintheriverbed(5drillholesandoneseismicline)indicatedadepthofoverburdenof40to80feetofrelativelyloosealluvialgravels,cobblesandboulders.Thestabilityofthisalluviumwasquestionedundertheseismicloadingconditionsbeingconsideredfortheproject.(ii)Drillingresultsindicatedtheunderlyingrockatthedamsitetobeadioriteintrusionwithlocalandesitedikes.Theoverallrockwasfoundtobehardandfresh(lightlyweathered)withthefracturesbe-comingtighterwithdepth.Shearzoneswereobservedbothinoutcropsandthedrillcoresbutwerenotconsideredtobesignificant.(iii)Theweatheringoftherockintherightabutmentwasfoundtobemoreseverethantherestofthedamfoundation,averagingabout40feetbelowthebedrocksurface.(iv)Therockalongtheleftabutmentwasalsoidentifiedasdiorite;however,inaCaEboring,asurfaceflowofandesiteporphorywasencountered.Therelationshipofthesetworocktypeswasnotdeli-neatedanditwasrecognizedthatthiswouldrequireresolutionbeforedesignofundergroundstructurescouldbeundertaken.(v)Northoftherightabutment,adeepbedrockdepressionfilledwithglacialmaterialwasencounteredinthedrillingandseismicrefrac-tionprograms.Glacialtillsoccurinthisareainthreemajorsequencesseparatedbylayersofsandygravelalluvialmaterialandtwomajorlakedepositsofplasticclays.Thelowestbedrocksurfaceencounteredinthedrillingwas454feetbelowthesurface,givingthebedrockatthatpointanelevationof1,775feet,comparedwiththecurrentriverbedrockelevationofabout1,395feet.(vi)TwoprominentshearzonesnamedliTheFins"and"Fingerbuster"weremappedasexposuresinthedamsitearea.Bothofthesezonestrend3-3During1978,Shannon&Wilson(14),underCaEcontract,ranthreeseismicre-fractionlinestotaling3,300feetintheborrowareaandalongtheproposedsaddledamtoexpandthedrillinginformation.This,alongwithalluvialfanmaterialsampling,wastheonlyCaEworkperformedatthesite.3.4-ConclusionsinvestigationsconductedbytheCaEandUSBRwerethefirstdetailed~++'n~i-ctoestablishthefeasibilityoftheproject.Thereviewoftheseinves-ationsservedasthebasisforidentifyingthosegeologicalandgeotechnicalthatwereconsideredtorequirefurtherinvestigation.Abriefsummarypriorfeaturesandfindingsofthoseinvestigationsfollows.WatanaSiteTheWatanasitewasconsideredsuitableforalargerockfilldam,anunder-groundpowerhouseandancillarystructures.However,beforethefeasibil-ityisconclusivelyestablished,certainfeatureswereidentifiedwhichrequiredfurtherinvestigation.(i)Theexplorationintheriverbed(5drillholesandoneseismicline)indicatedadepthofoverburdenof40to80feetofrelativelyloosealluvialgravels,cobblesandboulders.Thestabilityofthisalluviumwasquestionedundertheseismicloadingconditionsbeingconsideredfortheproject.(ii)Drillingresultsindicatedtheunderlyingrockatthedamsitetobeadioriteintrusionwithlocalandesitedikes.Theoverallrockwasfoundtobehardandfresh(lightlyweathered)withthefracturesbe-comingtighterwithdepth.Shearzoneswereobservedbothinoutcropsandthedrillcoresbutwerenotconsideredtobesignificant.(iii)Theweatheringoftherockintherightabutmentwasfoundtobemoreseverethantherestofthedamfoundation,averagingabout40feetbelowthebedrocksurface.(iv)Therockalongtheleftabutmentwasalsoidentifiedasdiorite;however,inaCaEboring,asurfaceflowofandesiteporphorywasencountered.Therelationshipofthesetworocktypeswasnotdeli-neatedanditwasrecognizedthatthiswouldrequireresolutionbeforedesignofundergroundstructurescouldbeundertaken.(v)Northoftherightabutment,adeepbedrockdepressionfilledwithglacialmaterialwasencounteredinthedrillingandseismicrefrac-tionprograms.Glacialtillsoccurinthisareainthreemajorsequencesseparatedbylayersofsandygravelalluvialmaterialandtwomajorlakedepositsofplasticclays.Thelowestbedrocksurfaceencounteredinthedrillingwas454feetbelowthesurface,givingthebedrockatthatpointanelevationof1,775feet,comparedwiththecurrentriverbedrockelevationofabout1,395feet.(vi)TwoprominentshearzonesnamedliTheFins"and"Fingerbuster"weremappedasexposuresinthedamsitearea.Bothofthesezonestrend3-3 3-4(b)DevilCanyonSite(ix)AdequatequantitiesofconstructionmaterialofsuitablequalityWIidentifiednearthedamsite.MaterialfromBorrowArea0ontherightabutmentwasclassifiedassemi-pervioustoimperviouscorematerial.ThetestsindicatedthatthismaterialissensitivetoIiationsinwatercontentandlosesstrengthrapidlywithincreasin~watercontent.Materialfromthealluvialdepositdownstreamoftldamaxis(BorrowAreaE)wasidentifiedasthemostlikelysource(cleanaggregate.Processingwasconsiderednecessaryforallmatelia1s.tobeofgenerallyIRockboltsandshotprovideadequateThefoundationrockatthesitewasconsideredqualitywithrelativelyhighintactstrength.cretewereconsideredlikelytoberequiredtosupportinundergroundexcavations.(x)Twopotentialquarryareaswereidentifiedassourcesofrockfill,riprapandcoarsefiltermaterials.Therockinbothareaswascliifiedasdioriteandofgoodquality.Furthermappingwasconsidelnecessarytoverifythesuitability.(xi)Permafrostwasfoundtobeverydeepontheleftabutment,ornorttfacingslope,whilesomewhatsporadicontherightabutment.PrellnarytemperaturereadingsindicatedthatthepermafrostisrelativEwarm,within_1°CtoO°C,andcouldbeeasilyhandledduringconstrtion.However,theseinstrumentshadnotstabilizedbytheendofCOEinvestigationsandfurtherreadingswillbenecessary.TheinvestigationsconductedtodateindicatethattheDevilCanyonsitEwouldbeafeasiblelocationforahighconcretegravityorthinarchdawithanundergroundpowerhouse.However,certainspecificfeatureswereidentifiedbyboththeUSSRandtheCOEforfurtherstudytodefinethesubsurfaceconditionsandfullyevaluatetheextentandcharacteristicsgeologicfeaturesbeforethefeasibilityofconcretestructurescouldbepositivelyestablished.(i)Thebedrockattheproposeddamsitewasclassifiedasathinlybedded,finegrainedphyllite.Thestrikeofthebeddingwasfoundbegenerallyeast-west,parallelingtheriver,anddipping65°to7tothesouth.Thedrillingindicatedthatweatheringextendssomefeetbelowtherocksurface,withpenetrativeweatheringrestrictednorthwestwithstrikesfrom300°to320°(N600WtoN400W)anddipto90°SWandNE.liTheFinsll,located3,400feetupstreamofthecenterline,hadanobservablewidthinexcessof400feetwithribcompetentrock5to25feetwide,boundedbyseverelyalteredzoneThe"Fingerbusterll,located2,500feetdownstreamoftheaxis,waslesswelldefined,withrockfacesparallelingtheshearzone.(vii)Theseismicrefractionsurveyindicatedalowvelocityzonealongrightabutmentthatcouldbeinterpretedasapossibleslideblockwhichrequiresfurtherinvestigation.(viii)3-4(b)DevilCanyonSite(ix)AdequatequantitiesofconstructionmaterialofsuitablequalityWIidentifiednearthedamsite.MaterialfromBorrowArea0ontherightabutmentwasclassifiedassemi-pervioustoimperviouscorematerial.ThetestsindicatedthatthismaterialissensitivetoIiationsinwatercontentandlosesstrengthrapidlywithincreasin~watercontent.Materialfromthealluvialdepositdownstreamoftldamaxis(BorrowAreaE)wasidentifiedasthemostlikelysource(cleanaggregate.Processingwasconsiderednecessaryforallmatelia1s.tobeofgenerallyIRockboltsandshotprovideadequateThefoundationrockatthesitewasconsideredqualitywithrelativelyhighintactstrength.cretewereconsideredlikelytoberequiredtosupportinundergroundexcavations.(x)Twopotentialquarryareaswereidentifiedassourcesofrockfill,riprapandcoarsefiltermaterials.Therockinbothareaswascliifiedasdioriteandofgoodquality.Furthermappingwasconsidelnecessarytoverifythesuitability.(xi)Permafrostwasfoundtobeverydeepontheleftabutment,ornorttfacingslope,whilesomewhatsporadicontherightabutment.PrellnarytemperaturereadingsindicatedthatthepermafrostisrelativEwarm,within_1°CtoO°C,andcouldbeeasilyhandledduringconstrtion.However,theseinstrumentshadnotstabilizedbytheendofCOEinvestigationsandfurtherreadingswillbenecessary.TheinvestigationsconductedtodateindicatethattheDevilCanyonsitEwouldbeafeasiblelocationforahighconcretegravityorthinarchdawithanundergroundpowerhouse.However,certainspecificfeatureswereidentifiedbyboththeUSSRandtheCOEforfurtherstudytodefinethesubsurfaceconditionsandfullyevaluatetheextentandcharacteristicsgeologicfeaturesbeforethefeasibilityofconcretestructurescouldbepositivelyestablished.(i)Thebedrockattheproposeddamsitewasclassifiedasathinlybedded,finegrainedphyllite.Thestrikeofthebeddingwasfoundbegenerallyeast-west,parallelingtheriver,anddipping65°to7tothesouth.Thedrillingindicatedthatweatheringextendssomefeetbelowtherocksurface,withpenetrativeweatheringrestrictednorthwestwithstrikesfrom300°to320°(N600WtoN400W)anddipto90°SWandNE.liTheFinsll,located3,400feetupstreamofthecenterline,hadanobservablewidthinexcessof400feetwithribcompetentrock5to25feetwide,boundedbyseverelyalteredzoneThe"Fingerbusterll,located2,500feetdownstreamoftheaxis,waslesswelldefined,withrockfacesparallelingtheshearzone.(vii)Theseismicrefractionsurveyindicatedalowvelocityzonealongrightabutmentthatcouldbeinterpretedasapossibleslideblockwhichrequiresfurtherinvestigation.(viii) lowzonesalongthejoints.Overall,therockwasfoundtobeofgoodquality.Onemasterjointsetwasidentifiedstriking335°(N25°W)anddipping800E,withgeneralspacingof5feet.Thevalleywallsatthedamsiteareverysteepandwerefoundtohavelyathincoverofoverburdenconsistingmainlyoftalusatthee.Ontheuplandareas,acoveringofglacialtill5to35feetthickwasobserved.theleftabutment,aseriesofsmalllakeswereobservedapproxi-paralleltotheriverchannel.Deepoverburden,upto80feetnthicknesswasencounteredinthisarea.Further,itwaspostulatedthatashearzoneorafaultexistedalongtheselakes.numberofshearzoneswereencountered duringtheinvestigationsbothsubparallelandsubperpendiculartotheriverchannel.Itwasideredthattheseshearzoneswereeitherlocalstressreliefandpartof amoregeneralsubregionalshearpattern,respec-tively,whichcouldhaveanimportanteffectonthedesignandredfurtherinvestigation.thoughnopositiveevidencewasencountered,itwaspostulatedthatsitetopographymayindicatetheexistenceofapossiblefaultormajorshearzoneparalleltotheriver.rockconditionswereconsideredadequateforundergroundexcava-on.Conventionalrocksupportsystemsincludingshotcretewerecon-sideredadequatetoprovidesupportexceptattheportalsandwithinofverypoorqualityrock.Furtherinvestigationwasconsiderednecessarytodefinetheconditionspresentforthemostadvantageousalignmentofthestructures.AlargefanareanearCheechakoCreek,immediatelyupstreamoftheproposeddamsite,wasexploredfortheavailabilityofmaterialsforaggregateandthesaddledamconstruction.Thematerialwithinthisalluvialfanwasfoundtobesuitableforconcreteaggre-gateexceptforadeficiencyof3/4to1-1/2inchsizethatcouldcomefromlocalmorainalmaterial.Laboratorytestsconductedonthecollectedsamplesconfirmedtheirgeneralsuitabilityprovidedproperprocessingwasemployed.However,theresistanceofthematerialtoeffectsofthecoldweatherwasnotfullyevaluated.Atthistimenoestimateofavailablequantitieshasbeenmade,butitislikelythatsufficientquantitiesareavailableforconstructionrequirements.Theexplorationsinthefanareaalsoindicatedtheexistenceofastepinthebedrocksurfacefromdepthsof100onthewestto350feetontheeastside,within500feethorizontally.Thesignificanceofthisstephasnotyetbeendetermined,butthegeologicsettingandformofthisfeaturewillbeconsideredinsubsequentinvestigations,toascertainifitisanerosionalorfault-causedphenomenon.Thestepisalsocoincidentwithasharpbendintherivercourse.3-5lowzonesalongthejoints.Overall,therockwasfoundtobeofgoodquality.Onemasterjointsetwasidentifiedstriking335°(N25°W)anddipping800E,withgeneralspacingof5feet.Thevalleywallsatthedamsiteareverysteepandwerefoundtohavelyathincoverofoverburdenconsistingmainlyoftalusatthee.Ontheuplandareas,acoveringofglacialtill5to35feetthickwasobserved.theleftabutment,aseriesofsmalllakeswereobservedapproxi-paralleltotheriverchannel.Deepoverburden,upto80feetnthicknesswasencounteredinthisarea.Further,itwaspostulatedthatashearzoneorafaultexistedalongtheselakes.numberofshearzoneswereencountered duringtheinvestigationsbothsubparallelandsubperpendiculartotheriverchannel.Itwasideredthattheseshearzoneswereeitherlocalstressreliefandpartof amoregeneralsubregionalshearpattern,respec-tively,whichcouldhaveanimportanteffectonthedesignandredfurtherinvestigation.thoughnopositiveevidencewasencountered,itwaspostulatedthatsitetopographymayindicatetheexistenceofapossiblefaultormajorshearzoneparalleltotheriver.rockconditionswereconsideredadequateforundergroundexcava-on.Conventionalrocksupportsystemsincludingshotcretewerecon-sideredadequatetoprovidesupportexceptattheportalsandwithinofverypoorqualityrock.Furtherinvestigationwasconsiderednecessarytodefinetheconditionspresentforthemostadvantageousalignmentofthestructures.AlargefanareanearCheechakoCreek,immediatelyupstreamoftheproposeddamsite,wasexploredfortheavailabilityofmaterialsforaggregateandthesaddledamconstruction.Thematerialwithinthisalluvialfanwasfoundtobesuitableforconcreteaggre-gateexceptforadeficiencyof3/4to1-1/2inchsizethatcouldcomefromlocalmorainalmaterial.Laboratorytestsconductedonthecollectedsamplesconfirmedtheirgeneralsuitabilityprovidedproperprocessingwasemployed.However,theresistanceofthematerialtoeffectsofthecoldweatherwasnotfullyevaluated.Atthistimenoestimateofavailablequantitieshasbeenmade,butitislikelythatsufficientquantitiesareavailableforconstructionrequirements.Theexplorationsinthefanareaalsoindicatedtheexistenceofastepinthebedrocksurfacefromdepthsof100onthewestto350feetontheeastside,within500feethorizontally.Thesignificanceofthisstephasnotyetbeendetermined,butthegeologicsettingandformofthisfeaturewillbeconsideredinsubsequentinvestigations,toascertainifitisanerosionalorfault-causedphenomenon.Thestepisalsocoincidentwithasharpbendintherivercourse.3-5 (ix)Permafrostasencounteredwassporadicandshallow.Thinlensesandpocketswereencounteredduringroadconstructionontheleftabutment.Itwasconsidereddoubtfulthatpermafrostwouldbeaproblem.(x)Itwasconcludedthatgroutinganddrainageunderthestructureandirtheabutmentswouldberequired.Recommendedfoundationpreparationincludedapproximately40feetofrockexcavationtosoundrock,consolidationgroutinganddentalconcreteworktotreatlocalshearzonesandpoorrockzones.3-6(ix)Permafrostasencounteredwassporadicandshallow.Thinlensesandpocketswereencounteredduringroadconstructionontheleftabutment.Itwasconsidereddoubtfulthatpermafrostwouldbeaproblem.(x)Itwasconcludedthatgroutinganddrainageunderthestructureandirtheabutmentswouldberequired.Recommendedfoundationpreparationincludedapproximately40feetofrockexcavationtosoundrock,consolidationgroutinganddentalconcreteworktotreatlocalshearzonesandpoorrockzones.3-6 TABLE3.1-SUMMARYOFPREVIOUSDRILLING-WATANADepthofBoring,ft.MeasuredDownDrillHoleAxisofHoleAngleNumberLocation(Overburden)W/VerticalOrientationDH-1RiverValley122.8(43.8)VerticalDH-2RiverValley29.0(29.0)VerticalDH-3RiverValley174.5(77.6)VerticalDH-4RiverValley122.9(77.7)VerticalDH-5RiverValley176.9(59.6)VerticalDH-6RightAbutment149.5(3.5)VerticalDH-7RightAbutment122.2(8.5)31°S300WDH-8RightAbutment150.0(16.2)VerticalDH-9RightAbutment283.8(5.6)45°N43°WDH-10RightAbutment203.5(19.6)VerticalDH-11RightAbutment300.0(22.7)45°N32°EDH-12LeftAbutment301.1(9.5)VerticalDR-13RelictChannel84.0(84.0)VerticalDR-14RelictChannel75.0(75.0)VerticalDR-15RelictChannel316.5(286.0)VerticalDR-16LeftAbutment91.5(67.0)VerticalDR-17LeftAbutment35.7(9.0)VerticalDR-18LeftAbutment248.3(231.0)VerticalDR-19RelictChannel78.3(55.0)VerticalDR-20OutletStructure252.6(210.0)VerticalDH-21RiverValley603.7(84.5)32.4°N4°EDR-22RelictChannel493.6(454.0)VerticalDH-23LeftAbutment119.2(7.0)45°S300WDH-24LeftAbutment139.9(6.9)VerticalDH-25LeftAbutment79.9(79.9)46°N47°EDR-26RelictChannel94.8(94.8)VerticalDR-27RelictChannel44.0(44.0)VerticalDH-28LeftAbutment125.2(9.2)VerticalReference:U.S.ArmyCorpsofEngineers,1979(18)TABLE3.1-SUMMARYOFPREVIOUSDRILLING-WATANADepthofBoring,ft.MeasuredDownDrillHoleAxisofHoleAngleNumberLocation(Overburden)W/VerticalOrientationDH-1RiverValley122.8(43.8)VerticalDH-2RiverValley29.0(29.0)VerticalDH-3RiverValley174.5(77.6)VerticalDH-4RiverValley122.9(77.7)VerticalDH-5RiverValley176.9(59.6)VerticalDH-6RightAbutment149.5(3.5)VerticalDH-7RightAbutment122.2(8.5)31°S300WDH-8RightAbutment150.0(16.2)VerticalDH-9RightAbutment283.8(5.6)45°N43°WDH-10RightAbutment203.5(19.6)VerticalDH-11RightAbutment300.0(22.7)45°N32°EDH-12LeftAbutment301.1(9.5)VerticalDR-13RelictChannel84.0(84.0)VerticalDR-14RelictChannel75.0(75.0)VerticalDR-15RelictChannel316.5(286.0)VerticalDR-16LeftAbutment91.5(67.0)VerticalDR-17LeftAbutment35.7(9.0)VerticalDR-18LeftAbutment248.3(231.0)VerticalDR-19RelictChannel78.3(55.0)VerticalDR-20OutletStructure252.6(210.0)VerticalDH-21RiverValley603.7(84.5)32.4°N4°EDR-22RelictChannel493.6(454.0)VerticalDH-23LeftAbutment119.2(7.0)45°S300WDH-24LeftAbutment139.9(6.9)VerticalDH-25LeftAbutment79.9(79.9)46°N47°EDR-26RelictChannel94.8(94.8)VerticalDR-27RelictChannel44.0(44.0)VerticalDH-28LeftAbutment125.2(9.2)VerticalReference:U.S.ArmyCorpsofEngineers,1979(18) TABLE3.2-SUMMARYOFPREVIOUSDRILLING-DEVILCANYONDepthofBoring,ft.MeasuredDownDrillHoleAxisofHoleAngleNumberLocation(Overburden)W/VerticalOrientationDH-1leftAbutment117.3(0.0)45QS23QEDH-3LeftAbutment(HoleTrenched)VerticalDH-4leftAbutment52.5(24.7)VerticalDH-5leftAbutment86.2(55.5)VerticalDH-6leftAbutment107.3(86.9)VerticalDH-7LeftAbutment59.5(33.9)VerticalDH-8LeftAbutment150.4(0.0)60QN9QWDH-9LeftAbutment87.0(0.0)45QDueNorthDH-10leftAbutment121.7(0.0)38QN65QEDH-11leftAbutment30.5(0.0)48QN5QWDH-11ALeftAbutment29.1(0.0)45QN5QWDH-11BLeftAbutment33.9(0.0)39QN5QWDH-11CleftAbutment150.1(0.0)33QN5QWDH-12leftAbutment127.5(0.0)30QN45QEDH-12AleftAbutment149.3(0.0)45QN45QEDH-13RightAbutment137.0(0.0)45QS18QEDH-13ARightAbutment80.7(0.0)37QS18QEDH-14RightAbutment50.0(0.0)45QS45QWDH-14ARightAbutment130.4(0.0)37QS45QWDH-14BRightAbutment146.2(0.0)60QS45QWDH-14CRightAbutment82.0(0.0)35QS4QEDH-15RightAbutment68.3(47.6)VerticalReferenceu.S.BureauofReclamation,1960(19)TABLE3.2-SUMMARYOFPREVIOUSDRILLING-DEVILCANYONDepthofBoring,ft.MeasuredDownDrillHoleAxisofHoleAngleNumberLocation(Overburden)W/VerticalOrientationDH-1leftAbutment117.3(0.0)45QS23QEDH-3LeftAbutment(HoleTrenched)VerticalDH-4leftAbutment52.5(24.7)VerticalDH-5leftAbutment86.2(55.5)VerticalDH-6leftAbutment107.3(86.9)VerticalDH-7LeftAbutment59.5(33.9)VerticalDH-8LeftAbutment150.4(0.0)60QN9QWDH-9LeftAbutment87.0(0.0)45QDueNorthDH-10leftAbutment121.7(0.0)38QN65QEDH-11leftAbutment30.5(0.0)48QN5QWDH-11ALeftAbutment29.1(0.0)45QN5QWDH-11BLeftAbutment33.9(0.0)39QN5QWDH-11CleftAbutment150.1(0.0)33QN5QWDH-12leftAbutment127.5(0.0)30QN45QEDH-12AleftAbutment149.3(0.0)45QN45QEDH-13RightAbutment137.0(0.0)45QS18QEDH-13ARightAbutment80.7(0.0)37QS18QEDH-14RightAbutment50.0(0.0)45QS45QWDH-14ARightAbutment130.4(0.0)37QS45QWDH-14BRightAbutment146.2(0.0)60QS45QWDH-14CRightAbutment82.0(0.0)35QS4QEDH-15RightAbutment68.3(47.6)VerticalReferenceu.S.BureauofReclamation,1960(19) REFERENCE:U.s.ARMYCORPSOFENGINEERS,1979(IS)2200,"00DEADMANCREEK(GOO1500.a:t?'1VOFIGURE3.1CONTOURINTERVAL100FEETNOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)SECTIONSSHOWNONFIGURE6.53)SECTIONAISTENTATIVEDAMC/l1000010002COO?JXlO".-ISCALEINFEETAP200API7<Jf'.#I./"0API8~/0API9m"a{JQUARRYAoBORROWAREAFWATANA-PREVIOUSEXPLORATIONMAPAUGERHOLECOREDRillHOLEROTARYDRillHOLESEISMICLINE:OM(1975)aSW(1978}0APGDH00RLEGENDCORPSOFENGINEERS,1978.......TPTESTPITlJCROSSSECTIONBORROWAREAENOTE:FORlOCATIONOFBORROWAREAC,SEEFIGURE6.9REFERENCE:U.s.ARMYCORPSOFENGINEERS,1979(IS)2200,"00DEADMANCREEK(GOO1500.a:t?'1VOFIGURE3.1CONTOURINTERVAL100FEETNOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)SECTIONSSHOWNONFIGURE6.53)SECTIONAISTENTATIVEDAMC/l1000010002COO?JXlO".-ISCALEINFEETAP200API7<Jf'.#I./"0API8~/0API9m"a{JQUARRYAoBORROWAREAFWATANA-PREVIOUSEXPLORATIONMAPAUGERHOLECOREDRillHOLEROTARYDRillHOLESEISMICLINE:OM(1975)aSW(1978}0APGDH00RLEGENDCORPSOFENGINEERS,1978.......TPTESTPITlJCROSSSECTIONBORROWAREAENOTE:FORlOCATIONOFBORROWAREAC,SEEFIGURE6.9 REfERENCES:IJUSGS,TALKEETNAMOUNTAINS,(D-5),ALASKAQUADRANGLESEWARDMERIDIAN:T32N,RIE,S32AND33.2)U,S,ARMYCORFSOFENGINEERS,1979(IS}3)U.S.BUREAUOFRECLAMATION,1960.{19}DEVILCANYON-PREVIOUSEXPLORATIONMAPUSSR,1958oDHBOREHOLE___TP,S,TESTPITSANDTRENCHESCORPSOFENGINEERS,1978~SEISMICLINESljCROSSSECTIONNOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)SECTIONSHOWNONFIGURE6.13CONTOURINTERVAL50FEETDASHEDCONTOUR25FEETFIGURE3.2[Ai[]REfERENCES:IJUSGS,TALKEETNAMOUNTAINS,(D-5),ALASKAQUADRANGLESEWARDMERIDIAN:T32N,RIE,S32AND33.2)U,S,ARMYCORFSOFENGINEERS,1979(IS}3)U.S.BUREAUOFRECLAMATION,1960.{19}DEVILCANYON-PREVIOUSEXPLORATIONMAPUSSR,1958oDHBOREHOLE___TP,S,TESTPITSANDTRENCHESCORPSOFENGINEERS,1978~SEISMICLINESljCROSSSECTIONNOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)SECTIONSHOWNONFIGURE6.13CONTOURINTERVAL50FEETDASHEDCONTOUR25FEETFIGURE3.2[Ai[] GEOLOGYlogyoftheTalkeetnaMountainsandtheadjacentSusitnaRiverbasinislycomplexduetotheoccurrenceofseveralperiodsofintensefoldingting,intrusionofvolcanicsandplutons,regionalmetamorphism,differ-upliftandrepeatedglaciations(Figure4.1).Thefollowingisabriefofthegeologicsettingoftheregion.AdiscussionoftheregionalhasalsobeencompiledbyWoodward-ClydeConsultants(21).rockswhichoutcropintheregionareanupperPaleozoic(Table4.1)canicrocksequenceconsistingofcoarsetofinegrainedclasticflowsofbasaltictoandesiticcomposition,locallycontaininglimestone(2).Thisoldvolcanicsystemisexposedasacontinuousnortheast-ingbeltacrosstheeasternpartoftheSusitnaRiverbasin.ThisunconformablyoverlainbyTriassicandJurassicvolcanicandsedimen-andisintrudedbyJurassicdiorites(Figure4.1).Theserocksofashallowmarinesequenceofmetabasaltflows,interbeddedwithargillite,marbleandvolcaniclasticrocks.ThebestexposuresareinandWatanaCreeksarea.TheintrusiverocksofJurassicageincludeli,greenschists,dioritesandgranodioritesoftheintrudingbatho-complexesoftheTalkeetnaMountains(2).TheupliftandsubsequenterosionassociatedwiththeseplutoniceventswasfollowedbythemarineonofaturbiditesequenceoflowerCretaceousargillitesandlithic(4).TheserocksweresubsequentlyfaultedandcompressedintotightnalfoldsandsubjectedtolowgrademetamorphismduringthelateThissequenceofrockoutcropsintheDevilCanyonarea.theearlyTertiary,thecountryrockwasagainintrudedbyplutonscom-ofbiotitegranodioriteandothersmallgraniticbodies.Concurrentwithlowingtheseintrusions,athicksequenceoffelsictomaficvolcanicslowintrusivesofPaleocenetoMioceneageweredeposited.threemajorperiodsofdeformationarerecognized(4)fortheprojectiodofintensemetamorphism,plutonism,andupliftingintheJurassic;orogenyduringthemiddletolateCretaceous;iodofextensiveupliftanddenudationinthemiddleTertiarytoary.rstperiod(earlytoMiddleJurassic)wasthefirstmajororogeniceventSusitnabasinasitnowexists.Itwascharacterizedbytheintrusionofandaccompaniedbycrustalupliftandregionalmetamorphism.Therapid4-1GEOLOGYlogyoftheTalkeetnaMountainsandtheadjacentSusitnaRiverbasinislycomplexduetotheoccurrenceofseveralperiodsofintensefoldingting,intrusionofvolcanicsandplutons,regionalmetamorphism,differ-upliftandrepeatedglaciations(Figure4.1).Thefollowingisabriefofthegeologicsettingoftheregion.AdiscussionoftheregionalhasalsobeencompiledbyWoodward-ClydeConsultants(21).rockswhichoutcropintheregionareanupperPaleozoic(Table4.1)canicrocksequenceconsistingofcoarsetofinegrainedclasticflowsofbasaltictoandesiticcomposition,locallycontaininglimestone(2).Thisoldvolcanicsystemisexposedasacontinuousnortheast-ingbeltacrosstheeasternpartoftheSusitnaRiverbasin.ThisunconformablyoverlainbyTriassicandJurassicvolcanicandsedimen-andisintrudedbyJurassicdiorites(Figure4.1).Theserocksofashallowmarinesequenceofmetabasaltflows,interbeddedwithargillite,marbleandvolcaniclasticrocks.ThebestexposuresareinandWatanaCreeksarea.TheintrusiverocksofJurassicageincludeli,greenschists,dioritesandgranodioritesoftheintrudingbatho-complexesoftheTalkeetnaMountains(2).TheupliftandsubsequenterosionassociatedwiththeseplutoniceventswasfollowedbythemarineonofaturbiditesequenceoflowerCretaceousargillitesandlithic(4).TheserocksweresubsequentlyfaultedandcompressedintotightnalfoldsandsubjectedtolowgrademetamorphismduringthelateThissequenceofrockoutcropsintheDevilCanyonarea.theearlyTertiary,thecountryrockwasagainintrudedbyplutonscom-ofbiotitegranodioriteandothersmallgraniticbodies.Concurrentwithlowingtheseintrusions,athicksequenceoffelsictomaficvolcanicslowintrusivesofPaleocenetoMioceneageweredeposited.threemajorperiodsofdeformationarerecognized(4)fortheprojectiodofintensemetamorphism,plutonism,andupliftingintheJurassic;orogenyduringthemiddletolateCretaceous;iodofextensiveupliftanddenudationinthemiddleTertiarytoary.rstperiod(earlytoMiddleJurassic)wasthefirstmajororogeniceventSusitnabasinasitnowexists.Itwascharacterizedbytheintrusionofandaccompaniedbycrustalupliftandregionalmetamorphism.Therapid4-1 erosionalperiodfollowingthisupliftwasaccompaniedbymarinedepositionwithinthenarrowingCretaceousbasin.ThisperiodwasfollowedbycomplexfaultingandfoldingoftherocksduringmiddletolateCretaceousthatproducedapronouncednortheast-southweststrturalgrainacrosstheregion(4,5,8,g,13).ThemajorityofthestructUIfeatures,ofwhichtheTalkeetnaThrustfaultisthemostprominentintheTalkeetnaMountains,areaconsequenceofthisorogeny.TheTalkeetnaThrus'postulatedasrepresentinganoldsuturezone,involvingthethrustingofPaleozoic,TriassicandJurassicrocksovertheCretaceoussedimentaryrocks5,8).OthercompressionalstructuresrelatedtothisorogenyareevidentiltheintenseshearzonesroughlyparalleltoandsoutheastoftheTalkeetnaThrust.ThethirdmajorseriesofeventsshapingtheregioninvolvedaperiodofextlsiveupliftanddenudationfromthemiddleTertiarytoQuaternary(4).Twoprominenttectonicfeaturesofthisperiodbracketthebasinarea.TheDenafault,aright-lateralstrike-slipfault25milesnorthoftheSusitnaRiverexhibitsevidenceoffaultdisplacementduringCenozoictime(3)andtheCas'Mountain-Cariboufaultsystem,whichborderstheTalkeetnaMountainsapproximately70milessoutheastofthesites,isanormalfaultwhichhashadfaul'displacementduringtheHolocene(7).4.4-GlacialHistoryAperiodofcyclicclimaticcoolingduringtheQuaternaryresultedinrepeatlglaciationofsouthernAlaska.LittleinformationisavailableregardingthlglacialhistoryintheupperSusitnaRiverbasin.Unlikethenorths1deofAlaskaRangewhichischaracterizedbyalpine-typeglaciation,theSusitnab,experiencedcoalescingglaciersfromboththeAlaskaRangeandtheTalkeetnaMountainsthatmergedandfilledtheupperbasinarea.AtleastthreeperiodsofglaciationhavebeendelineatedfortheregionbasIontheglacialstratigraphy(11,12).Duringthemostrecentperiod,(lateWisconsinglaciation)glaciersfilledtheadjoininglowlandbasinsandsprea<ontothecontinentalshelf(11).WaningoftheicemassesfromtheAlaskaR,andTalkeetnaMountainsformedicebarrierswhichblockedthedrainageofgl,cialmeltwaterandproducedproglaciallakes.Asaconsequenceofthisrepelglaciation,theSusitnaandCopperRiverbasinsarecoveredbyvaryingthicknessesoftillsandlacustrinedeposits.4-2erosionalperiodfollowingthisupliftwasaccompaniedbymarinedepositionwithinthenarrowingCretaceousbasin.ThisperiodwasfollowedbycomplexfaultingandfoldingoftherocksduringmiddletolateCretaceousthatproducedapronouncednortheast-southweststrturalgrainacrosstheregion(4,5,8,g,13).ThemajorityofthestructUIfeatures,ofwhichtheTalkeetnaThrustfaultisthemostprominentintheTalkeetnaMountains,areaconsequenceofthisorogeny.TheTalkeetnaThrus'postulatedasrepresentinganoldsuturezone,involvingthethrustingofPaleozoic,TriassicandJurassicrocksovertheCretaceoussedimentaryrocks5,8).OthercompressionalstructuresrelatedtothisorogenyareevidentiltheintenseshearzonesroughlyparalleltoandsoutheastoftheTalkeetnaThrust.ThethirdmajorseriesofeventsshapingtheregioninvolvedaperiodofextlsiveupliftanddenudationfromthemiddleTertiarytoQuaternary(4).Twoprominenttectonicfeaturesofthisperiodbracketthebasinarea.TheDenafault,aright-lateralstrike-slipfault25milesnorthoftheSusitnaRiverexhibitsevidenceoffaultdisplacementduringCenozoictime(3)andtheCas'Mountain-Cariboufaultsystem,whichborderstheTalkeetnaMountainsapproximately70milessoutheastofthesites,isanormalfaultwhichhashadfaul'displacementduringtheHolocene(7).4.4-GlacialHistoryAperiodofcyclicclimaticcoolingduringtheQuaternaryresultedinrepeatlglaciationofsouthernAlaska.LittleinformationisavailableregardingthlglacialhistoryintheupperSusitnaRiverbasin.Unlikethenorths1deofAlaskaRangewhichischaracterizedbyalpine-typeglaciation,theSusitnab,experiencedcoalescingglaciersfromboththeAlaskaRangeandtheTalkeetnaMountainsthatmergedandfilledtheupperbasinarea.AtleastthreeperiodsofglaciationhavebeendelineatedfortheregionbasIontheglacialstratigraphy(11,12).Duringthemostrecentperiod,(lateWisconsinglaciation)glaciersfilledtheadjoininglowlandbasinsandsprea<ontothecontinentalshelf(11).WaningoftheicemassesfromtheAlaskaR,andTalkeetnaMountainsformedicebarrierswhichblockedthedrainageofgl,cialmeltwaterandproducedproglaciallakes.Asaconsequenceofthisrepelglaciation,theSusitnaandCopperRiverbasinsarecoveredbyvaryingthicknessesoftillsandlacustrinedeposits.4-2 Reference:VanEysinga,F.W.B.,GeologicTimeTable,3rdEdition,ElsevierScientlflCpublishingCa.,Amsterdam,1975.TABLE4.1-GEOLOGICTIMESCALEERACenozoicMesozoicPaleozoicPrecambrianPERIODQuaternaryTertiaryCretaceousJurassicTriassicPermianPennsylvanianMississippianDevonianSilurianOrdovicianCambrianEPOCHHolocenePleistocenePlioceneMioceneOligoceneEocenePaleoceneGLACIATIONWisconsinianIllinoianKansanNebraskanMillionsofYearsAgo1.B70230600Reference:VanEysinga,F.W.B.,GeologicTimeTable,3rdEdition,ElsevierScientlflCpublishingCa.,Amsterdam,1975.TABLE4.1-GEOLOGICTIMESCALEERACenozoicMesozoicPaleozoicPrecambrianPERIODQuaternaryTertiaryCretaceousJurassicTriassicPermianPennsylvanianMississippianDevonianSilurianOrdovicianCambrianEPOCHHolocenePleistocenePlioceneMioceneOligoceneEocenePaleoceneGLACIATIONWisconsinianIllinoianKansanNebraskanMillionsofYearsAgo1.B70230600 8!6fiGURE4.1•).<..j•••R3W•SCALEINMILESo2 4,.,.."........--AMPHIBOLITES,GREENSCHIST,FOLIATEDDIORITEBASALTICMETAVOLCANICROCKS,METABASALTANDSLATEBASALTICTOANDESITICMETAVOLCANICSLOCALLYINTERBEDDEDWITHMARBLETEETHONUPTHROWNSIDE,DASHEDWHEREINFERREDOTTEDWHERECONCEALEDPROPOSEDDAMSITES..R4Wf7\7\l\/\1\]:.66..6.6.~TRIASSIC~ZA"""<NI~..\>/\>..J---_-..!PALEOZOICTHRUSTFAULT-.....,,---V·INTENSESHEARINGPOSSIBLETHRUSTFAULT,TEETHONUPTHROWN···V·.··.V··.SIDELEGENDR5WR6WMAFICINTRUSIVESSCHIST,MIGMATITE,GRANITICROCKSUNDIVIDEDGRANITICROCKSUNDIFFERENTIATEDVOLCANICSaSHALLOWINTRUSIVESARGILLITEANDLITHICGRAYWACKEUNDIFFERENTIATEDSURFICIALDEPOSITSGRANODIORITE,QUARTZDIORITE,TRONDHJEMITEGRANODIORITEIBIOTITE-HORNBLENDEGRANODIORITE,BIOTITEGRANODIORITEJURASSICOJIIIII0r7.G;=::j~2::--L~~CENOZOICQUATERNARY,---,:I""'-.IMESOZOICCRETACEOUSC-=:'--::-=-=-Jt_-_-_-__-J1:..:::__-_-__-oJREGIONALGEOLOGY••o.ModifiedfromCsejtey,et01,1978>-a::<!oZ::JoCD:r:f-a::------,o-p('l+H-t_+W~""---__:M_I+¥_---_I---:::==--ll;>:::ff~~+-+_--------__1~8!6fiGURE4.1•).<..j•••R3W•SCALEINMILESo2 4,.,.."........-fIl/!IIIAAMPHIBOLITES,GREENSCHIST,FOLIATEDDIORITEBASALTICMETAVOLCANICROCKS,METABASALTANDSLATEBASALTICTOANDESITICMETAVOLCANICSLOCALLYINTERBEDDEDWITHMARBLETEETHONUPTHROWNSIDE,DASHEDWHEREINFERREDOTTEDWHERECONCEALEDPROPOSEDDAMSITES..R4Wf7\7\l\/\1\]:.66..6.6.~TRIASSIC~ZA"""<NI~..\>/\>..J---_-..!PALEOZOICTHRUSTFAULT-.....,,---V·INTENSESHEARINGPOSSIBLETHRUSTFAULT,TEETHONUPTHROWN···V·.··.V··.SIDELEGENDR5WR6WMAFICINTRUSIVESSCHIST,MIGMATITE,GRANITICROCKSUNDIVIDEDGRANITICROCKSUNDIFFERENTIATEDVOLCANICSaSHALLOWINTRUSIVESARGILLITEANDLITHICGRAYWACKEUNDIFFERENTIATEDSURFICIALDEPOSITSGRANODIORITE,QUARTZDIORITE,TRONDHJEMITEGRANODIORITEIBIOTITE-HORNBLENDEGRANODIORITE,BIOTITEGRANODIORITEJURASSICOJIIIII0r7.G;=::j~2::--L~~CENOZOICQUATERNARY,---,:I""'-.IMESOZOICCRETACEOUSC-=:'--::-=-=-Jt_-_-_-__-J1:..:::__-_-__-oJREGIONALGEOLOGY••o.ModifiedfromCsejtey,et01,1978>-a::<!oZ::JoCD:r:f-a::------,o-p('l+H-t_+W~""---__:M_I+¥_---_I---:::==--ll;>:::ff~~+-+_--------__1~ INVESTIGATIONinvestigationprogramwasdevelopedtodefinethegeologicandsub-identifiedbypreviousinvestigatorsattheWatanaandDevilsites.Inadditiontothereviewofinformationpublished,dis-wereheldwithpeopleknowledgeableofthearea.Inparticular,wereheldwiththeCOEtodiscussdetailsoftheir1978programandtheofthosepeopledirectlyinvolvedwiththeinvestigations."'~'""lgeotechnicalinvestigationprogramfortheWatanaandDevilCanyonintendedtoprovidethemaximumofinformationrelativetositegeolo-icalconditionsaimedtowardsestablishingthefeasibilityofconsistentwithoverallstudyobjectivesandschedules.programwasdevelopedasthefirstphaseofthisoverallinvestigation,istedofappropriateairphotointerpretation,surficialgeologicaliamondcoredrilling,permeabilitytesting,in-holegeophysicalinstallationofpiezometersandthermalprobes,augerdrilling,seismicsurveysandlaboratorytesting.oftheprogramwasprincipallydirectedtowardseffectivelyinitiatingnecessarytoinvestigate:logy.andquality.ngevaluationofrockconditions.lnr,'nwsourcesforconstructionmaterial.regime.geologicand/orgeotechnicalfeaturesorconditionsthatweredeline-ingpreviousstudiesandconsideredtowarrantfurtherinvestigationdiscussedearlierinthisreport.Theparticularfeaturesselectedi.t"n"duringthe1980programwere:Shearzonescalled"TheFins"and"Fingerbuster"locatedimmediate1yupstreamanddownstreamoftheproposeddamsite.A"relictchannel"locatedontherightbank(northeastofthedamsite).Anandesiteflowstructureontheleftbankofthedamsite.Apotentialshearzonebeneaththeriverchannel.Possiblestressreliefjointsandshearzonesontheleft(south)bankoftheriveratthedamsite.5-1INVESTIGATIONinvestigationprogramwasdevelopedtodefinethegeologicandsub-identifiedbypreviousinvestigatorsattheWatanaandDevilsites.Inadditiontothereviewofinformationpublished,dis-wereheldwithpeopleknowledgeableofthearea.Inparticular,wereheldwiththeCOEtodiscussdetailsoftheir1978programandtheofthosepeopledirectlyinvolvedwiththeinvestigations."'~'""lgeotechnicalinvestigationprogramfortheWatanaandDevilCanyonintendedtoprovidethemaximumofinformationrelativetositegeolo-icalconditionsaimedtowardsestablishingthefeasibilityofconsistentwithoverallstudyobjectivesandschedules.programwasdevelopedasthefirstphaseofthisoverallinvestigation,istedofappropriateairphotointerpretation,surficialgeologicaliamondcoredrilling,permeabilitytesting,in-holegeophysicalinstallationofpiezometersandthermalprobes,augerdrilling,seismicsurveysandlaboratorytesting.oftheprogramwasprincipallydirectedtowardseffectivelyinitiatingnecessarytoinvestigate:logy.andquality.ngevaluationofrockconditions.lnr,'nwsourcesforconstructionmaterial.regime.geologicand/orgeotechnicalfeaturesorconditionsthatweredeline-ingpreviousstudiesandconsideredtowarrantfurtherinvestigationdiscussedearlierinthisreport.Theparticularfeaturesselectedi.t"n"duringthe1980programwere:Shearzonescalled"TheFins"and"Fingerbuster"locatedimmediate1yupstreamanddownstreamoftheproposeddamsite.A"relictchannel"locatedontherightbank(northeastofthedamsite).Anandesiteflowstructureontheleftbankofthedamsite.Apotentialshearzonebeneaththeriverchannel.Possiblestressreliefjointsandshearzonesontheleft(south)bankoftheriveratthedamsite.5-1 -Possibleshearzonesorburiedchannelbeneaththesaddledamlocationontheleftbankoftheriver.Detailedscopeandmethodologyfortheworkperformedarepresentedinthefollowingparagraphs.AdetaileddiscussionoftheresultsoftheprogramarepresentedinSection6.Delaysinthecompletionoftheairphotointerpretatioworkpreventedtheuseofthisdatainplanningofthe198DexplorationprogramTheexplorationprogramwasthereforedevelopedonlyonthebasisoffieldreconnaissanceandreviewofpreviousworkbyothers.5.2-ScopeandMethodology(a)GeologicMappingThe1980fieldgeologicmappingprogramwasdirectedtothedamsitestoexpandandverifythepreviousgeologicmapping.Geologicmappingofeachoftheproposeddamsitesincludedwalkingselectedgroundtraverses,notingallbedrockoutcropsandunconsolidatedmaterial.Aerialphoto-graphicbasemapsatscalesof1:6,000and1:24,000wereusedinmappingtheWatanaandDevilCanyondamsitesrespectively.Ateachexposure,thelithology,typeofmaterial,bedding,jointing,weathering,outcropsizeandelevationwerenotedandplottedonthebasemaps.GeologicreconnaissanceoftheDevilCanyonreservoirandpotentialtunnelroutes(whichwerestudiedduringprojectdefinitionstudies)wasperformebetweenPortageandTsusenaCreeksandextendedupto5milesnorthandsouthoftheSusitnaRiver.Ahelicopterreconnaissancewasmadewithina10-mileradiusoftheWatanadamsitetodelineateunconsolidatedmaterialaspotentialborrowsources.Themappingofthereservoirareaswasplottedoneithera1:12,000aerialphotographicora1:63,360USGStopographicbasemap.(b)SubsurfaceInvestigations(i)DiamondCoreDrillingDiamondcoredrillingwasperformedinthefoundationsandabutmentsofbothdamsitesutilizingaskid-mountedLongyear-34diamonddrillwithatwoorthreemancrewtooperateandmaintaintherig.Atotaof3800linearfeetofdrillingwasperformed.Threediamondcoreboringsweredrilledateachsite.Allloggingandsupervisionwasconductedbyageologistwhodescribed,photographedandpackedtherockcoreandsupervisedpermeabilitytestingandinstrumentinstallation.Priortothestartofdiamondcoredrilling,allholeswerecasedthroughtheoverburdenintosoundrock.Thecasingwasleftintheholetopermit subsequenttestingandinstallationofinstru-mentation.5-2-Possibleshearzonesorburiedchannelbeneaththesaddledamlocationontheleftbankoftheriver.Detailedscopeandmethodologyfortheworkperformedarepresentedinthefollowingparagraphs.AdetaileddiscussionoftheresultsoftheprogramarepresentedinSection6.Delaysinthecompletionoftheairphotointerpretatioworkpreventedtheuseofthisdatainplanningofthe198DexplorationprogramTheexplorationprogramwasthereforedevelopedonlyonthebasisoffieldreconnaissanceandreviewofpreviousworkbyothers.5.2-ScopeandMethodology(a)GeologicMappingThe1980fieldgeologicmappingprogramwasdirectedtothedamsitestoexpandandverifythepreviousgeologicmapping.Geologicmappingofeachoftheproposeddamsitesincludedwalkingselectedgroundtraverses,notingallbedrockoutcropsandunconsolidatedmaterial.Aerialphoto-graphicbasemapsatscalesof1:6,000and1:24,000wereusedinmappingtheWatanaandDevilCanyondamsitesrespectively.Ateachexposure,thelithology,typeofmaterial,bedding,jointing,weathering,outcropsizeandelevationwerenotedandplottedonthebasemaps.GeologicreconnaissanceoftheDevilCanyonreservoirandpotentialtunnelroutes(whichwerestudiedduringprojectdefinitionstudies)wasperformebetweenPortageandTsusenaCreeksandextendedupto5milesnorthandsouthoftheSusitnaRiver.Ahelicopterreconnaissancewasmadewithina10-mileradiusoftheWatanadamsitetodelineateunconsolidatedmaterialaspotentialborrowsources.Themappingofthereservoirareaswasplottedoneithera1:12,000aerialphotographicora1:63,360USGStopographicbasemap.(b)SubsurfaceInvestigations(i)DiamondCoreDrillingDiamondcoredrillingwasperformedinthefoundationsandabutmentsofbothdamsitesutilizingaskid-mountedLongyear-34diamonddrillwithatwoorthreemancrewtooperateandmaintaintherig.Atotaof3800linearfeetofdrillingwasperformed.Threediamondcoreboringsweredrilledateachsite.Allloggingandsupervisionwasconductedbyageologistwhodescribed,photographedandpackedtherockcoreandsupervisedpermeabilitytestingandinstrumentinstallation.Priortothestartofdiamondcoredrilling,allholeswerecasedthroughtheoverburdenintosoundrock.Thecasingwasleftintheholetopermit subsequenttestingandinstallationofinstru-mentation.5-2 5-3Thepermeabilityforeachtestsectionwascalculatedusingthefollowingformula:lnLrthe1980fieldseasonisshownDrillingsummarylogsandQk=0.0679--2"n6>~,,-rL1THWhere:k=permeability,cm/secQ=constantrateofflow,gpmL=lengthoftestsection,ftandL>lOrH=differentialheadofwater,ftr=radiusofhole,ftln=naturallogarithmIn-HoleGeophysicalLoggingIn-holegeophysicalloggingwascarriedoutinallthreediamonddrillholesattheDevilCanyonsiteandtwoholesattheWatanasite.BH-2attheWatanasitecavedbadlyandwasnottested.Atotalof3,225linearfeetofloggingwascompleted.TheloggingprocedureinvolvedloweringageophysicalprobeintheholeonawirelinewiththedataAmaximumtestpressureequalto1psiperfootofverticaldepthbelowthegroundsurfacetothewatertable,plus0.5psiperfootofverticaldepthbelowthewatertabledowntothecenterofthetestsection,wasused.However,innocasewasthepressureallowedtoexceed200psi.Theactualgaugepressurewasadjustedtotakeintoconsiderationthedepthofwatertable.ThetestdataandcalculationsarepresentedinAppendixB-1andB-2forWatanaandDevilCanyonsites,respectively,andaschematicoftheprocedureusedisinAppendixB-3.summaryofthedrillingactivityforTable5.1andFigures5.1,and5.2.reportsarecontainedinAppendixB.Permeabilitytestingwasconductedinallthediamonddrillholesuponcompletionofthecoredrilling.Priortotesting,eachholewasthoroughlyflushedwithclearwaterandthedrillstringwithdrawn.Followingflushingofthehole,apackerassemblyconsistingoftwoinflatablepackerelementsseparatedbyaperforatedsectionofpipeandconnectedtothesurfacebyasteelriserpipeandrubberinfla-tionhosewasloweredintothe boreholetothedesireddepth.Thetestprocedureinvolvedinflatingthepackerswithnitrogentoisolateasectionoftheborehole,pumpingwaterunderpressureintothetestzoneandrecordingtheflowrates.Basedontheflowrates,hydraulichead,holediameterandlengthoftestsection,thepermeabilityoftherockoverthetestsectionwascalculated.Ingeneral,thepackerassemblywasinstalledtothebottomoftheholewithtestsbeingrunover16.1footintervalsastheassemblywaswithdrawn.5-3Thepermeabilityforeachtestsectionwascalculatedusingthefollowingformula:lnLrthe1980fieldseasonisshownDrillingsummarylogsandQk=0.0679--2"n6>~,,-rL1THWhere:k=permeability,cm/secQ=constantrateofflow,gpmL=lengthoftestsection,ftandL>lOrH=differentialheadofwater,ftr=radiusofhole,ftln=naturallogarithmIn-HoleGeophysicalLoggingIn-holegeophysicalloggingwascarriedoutinallthreediamonddrillholesattheDevilCanyonsiteandtwoholesattheWatanasite.BH-2attheWatanasitecavedbadlyandwasnottested.Atotalof3,225linearfeetofloggingwascompleted.TheloggingprocedureinvolvedloweringageophysicalprobeintheholeonawirelinewiththedataAmaximumtestpressureequalto1psiperfootofverticaldepthbelowthegroundsurfacetothewatertable,plus0.5psiperfootofverticaldepthbelowthewatertabledowntothecenterofthetestsection,wasused.However,innocasewasthepressureallowedtoexceed200psi.Theactualgaugepressurewasadjustedtotakeintoconsiderationthedepthofwatertable.ThetestdataandcalculationsarepresentedinAppendixB-1andB-2forWatanaandDevilCanyonsites,respectively,andaschematicoftheprocedureusedisinAppendixB-3.summaryofthedrillingactivityforTable5.1andFigures5.1,and5.2.reportsarecontainedinAppendixB.Permeabilitytestingwasconductedinallthediamonddrillholesuponcompletionofthecoredrilling.Priortotesting,eachholewasthoroughlyflushedwithclearwaterandthedrillstringwithdrawn.Followingflushingofthehole,apackerassemblyconsistingoftwoinflatablepackerelementsseparatedbyaperforatedsectionofpipeandconnectedtothesurfacebyasteelriserpipeandrubberinfla-tionhosewasloweredintothe boreholetothedesireddepth.Thetestprocedureinvolvedinflatingthepackerswithnitrogentoisolateasectionoftheborehole,pumpingwaterunderpressureintothetestzoneandrecordingtheflowrates.Basedontheflowrates,hydraulichead,holediameterandlengthoftestsection,thepermeabilityoftherockoverthetestsectionwascalculated.Ingeneral,thepackerassemblywasinstalledtothebottomoftheholewithtestsbeingrunover16.1footintervalsastheassemblywaswithdrawn. 5-4(v)InstrumentationTomonitorthegroundwaterandpermafrostconditionsinthebedrock,piezometersandthermistorstringswereinstalledinallthreebore-holes(BH-1,BH-2andBH-4)atDevilCanyon(Figure5.2);andBH-6atWatana(Figure5.1).onaself-containedloggtemperature,caliper,beingreturnedtothesurfaceandrecordedunit.Thelogsrunineachholeincluded:resistivityandvelocity.ThepiezometersusedwereapneumatictypeassemblymanufacturedbyPeturInstrumentCompanyofSeattle,WA.Thepneumatictypepiezo-meterswereselectedbasedonthefactthatsubfreezingtemperatureswerelikelytobeencounteredintheupperportionsoftheholeswhicwouldcauseblockageinconventionalstandpipepiezometers.Pneumatitypepiezometersarealsoquickandeasytoreadaswellasbeingaccuratewhichisaprimeconsiderationduringwintermonths.TheresultsofthegeophysicalloggingarepresentedinAppendixE.(iv)BoreholePhotographyScheduledboreholephotographytoaugmentcoreloggingdataprovedtcbeimpracticalduetotheinclinationofthedrillholesandthefracturednatureoftherock.Inthreeofthediamonddrillholes,BH-6andBH-8atWatana,andBH-1atDevilCanyon,a"dummy"cameraunitwhichwasloweredintheholestocheckforanyobstructionsancsafepassageoftheunit,becamelodgedinthehole.The"dummy"uniwasrecoveredinallcases,butitwasnotconsideredadvisabletolowerthecamera,aschancesofitbeinglostintheholeordamagedwereveryhigh.ThethermistorstringsweremanufacturedbyInstrumentationServicesinFairbanks,Alaska.Thethermistorstringswereeach250feetlon~withredundantthermistorpointsinstalledat3,6,9,12,15, 18,2125,50,75,100, 125, 150, 175,200and250feet.A40strandcablewasusedtoconnectthethermistorstothesurfacewhereaquickconnectplugonthecablewaspluggedintoaswitchboxthatinturnwasconnectedtoaportablereadoutbox.Thesystemisdesignedsuctthattworeadingsareobtainedateachdepthsoreadingscanbecros!checked.Eachthermistorpointwasinitiallycalibratedinthelaboratorybeforeinstallationandacomputerprogramsetuptocon-vertreadingstotemperature,takingintoaccountthecorrectionfactorsforeachthermistor.Anaccuracyof+0.05'Cwasobtainedwitthisequipment.-TheinstallationdetailsareshownonFigure5.3and5.4.(vi)AugerDrillingAugerdrillingwasconductedatbothsitestoexpandtheworkdonebjthepreviousinvestigatorstodefinethepotentialborrowareas.At5-4(v)InstrumentationTomonitorthegroundwaterandpermafrostconditionsinthebedrock,piezometersandthermistorstringswereinstalledinallthreebore-holes(BH-1,BH-2andBH-4)atDevilCanyon(Figure5.2);andBH-6atWatana(Figure5.1).onaself-containedloggtemperature,caliper,beingreturnedtothesurfaceandrecordedunit.Thelogsrunineachholeincluded:resistivityandvelocity.ThepiezometersusedwereapneumatictypeassemblymanufacturedbyPeturInstrumentCompanyofSeattle,WA.Thepneumatictypepiezo-meterswereselectedbasedonthefactthatsubfreezingtemperatureswerelikelytobeencounteredintheupperportionsoftheholeswhicwouldcauseblockageinconventionalstandpipepiezometers.Pneumatitypepiezometersarealsoquickandeasytoreadaswellasbeingaccuratewhichisaprimeconsiderationduringwintermonths.TheresultsofthegeophysicalloggingarepresentedinAppendixE.(iv)BoreholePhotographyScheduledboreholephotographytoaugmentcoreloggingdataprovedtcbeimpracticalduetotheinclinationofthedrillholesandthefracturednatureoftherock.Inthreeofthediamonddrillholes,BH-6andBH-8atWatana,andBH-1atDevilCanyon,a"dummy"cameraunitwhichwasloweredintheholestocheckforanyobstructionsancsafepassageoftheunit,becamelodgedinthehole.The"dummy"uniwasrecoveredinallcases,butitwasnotconsideredadvisabletolowerthecamera,aschancesofitbeinglostintheholeordamagedwereveryhigh.ThethermistorstringsweremanufacturedbyInstrumentationServicesinFairbanks,Alaska.Thethermistorstringswereeach250feetlon~withredundantthermistorpointsinstalledat3,6,9,12,15, 18,2125,50,75,100, 125, 150, 175,200and250feet.A40strandcablewasusedtoconnectthethermistorstothesurfacewhereaquickconnectplugonthecablewaspluggedintoaswitchboxthatinturnwasconnectedtoaportablereadoutbox.Thesystemisdesignedsuctthattworeadingsareobtainedateachdepthsoreadingscanbecros!checked.Eachthermistorpointwasinitiallycalibratedinthelaboratorybeforeinstallationandacomputerprogramsetuptocon-vertreadingstotemperature,takingintoaccountthecorrectionfactorsforeachthermistor.Anaccuracyof+0.05'Cwasobtainedwitthisequipment.-TheinstallationdetailsareshownonFigure5.3and5.4.(vi)AugerDrillingAugerdrillingwasconductedatbothsitestoexpandtheworkdonebjthepreviousinvestigatorstodefinethepotentialborrowareas.At a(Figure5.1),fourholesweredrilledinBorrowArea0andnineBorrowAreaE.TwoholesweredrilledatDevilCanyon(FigureAsummaryofaugerholelocationsanddepthsarepresentedine5.2.Themoreextensiveprogramwhichhadbeenplannedwasledbecauseofunexpecteddifficultiesencounteredinadvancingtheaugerthroughboulders,cobbles,andhardgroundconditions.GrabsamplesweretakenfromBorrowAreaH.programinitiallyusedaplatform-mountedCME-45rigthatwasreplacedbyaCME-55forthedifficultdrillingconditions.Drillingwasperformedusingahollowstemcontinuousflightaugerstring,havingan8-inch0.0.anda3-1/4inchI.D.,toamaximumdepthof35feet.Materialsampleswerecollectedcontinuouslyintheupper10feetoftheholeandthenat5-footintervalstofulldepthusingasplit-spoonsampler.Thesamplingproceduresconsistedofdrillingtheaugersdowntotherequiredsamplingdepth,removingtheinnerplugandstem,andadvancingthesplit-spoonsampler,18inchesintothesoilbelowthecuttingheadbydrivingitwitha140lbhammerfallingfreely30inches(StandardPenetrationTest).Thesampleswerereturnedtothesurface,loggedbyageologistandpreparedfortransportandstorage.Inmostcases,4to5-inchlongthinbrasslinerswereusedinsidethesplit-spoonsampler,whichallowedselectedsamplestobecappedandsealed.Followingcompletionofthehole,theaugerstringwaswithdrawnandtheholebackfilledwiththedrillcuttings.ThelogsfortheseholesaregiveninAppendixC-l.ThepropertiesoftheborrowmaterialsarediscussedinSection5.SeismicRefractionSurveysSeismicrefractionsurveys(seismiclines)wereperformedontheriverbanksatbothdamsites,andintheborrowareasandrelictchannelneartheWatanasitetoextendthepreviousstudies.Eleventraversestotalling27,800feetwererununderthisprogram,andtheresultsarepresentedinAppendixD.ThelocationsofthelinesarealsoshownonFigure5.1forWatanaandFigure5.2forDevilCanyon.AttheWatanadamsite,fourtraverseswereshotintheimmediatedamsite.Twooftheselinescrossedtherightabutmentandtherelictchannelarea.Athirdlineislocatedupstreamoftheproposedaxisonbothabutments,andthefourthinvestigatedatopographicde-pressionamileupstreamofthedamaxisonthenorthsideoftheriver.BorrowAreas0andEatWatanawereexploredbyfourseismiclines(twowithineacharea).AtDevilCanyon,thethreeseismiclineswererunontheleft(south)bankoftheriveracrossthesmalllakeandadjacentslopestoinves-tigatetheoverburdenthicknessintheproposedsaddledamareaandtheexistenceofapossibleshearzone.5-5a(Figure5.1),fourholesweredrilledinBorrowArea0andnineBorrowAreaE.TwoholesweredrilledatDevilCanyon(FigureAsummaryofaugerholelocationsanddepthsarepresentedine5.2.Themoreextensiveprogramwhichhadbeenplannedwasledbecauseofunexpecteddifficultiesencounteredinadvancingtheaugerthroughboulders,cobbles,andhardgroundconditions.GrabsamplesweretakenfromBorrowAreaH.programinitiallyusedaplatform-mountedCME-45rigthatwasreplacedbyaCME-55forthedifficultdrillingconditions.Drillingwasperformedusingahollowstemcontinuousflightaugerstring,havingan8-inch0.0.anda3-1/4inchI.D.,toamaximumdepthof35feet.Materialsampleswerecollectedcontinuouslyintheupper10feetoftheholeandthenat5-footintervalstofulldepthusingasplit-spoonsampler.Thesamplingproceduresconsistedofdrillingtheaugersdowntotherequiredsamplingdepth,removingtheinnerplugandstem,andadvancingthesplit-spoonsampler,18inchesintothesoilbelowthecuttingheadbydrivingitwitha140lbhammerfallingfreely30inches(StandardPenetrationTest).Thesampleswerereturnedtothesurface,loggedbyageologistandpreparedfortransportandstorage.Inmostcases,4to5-inchlongthinbrasslinerswereusedinsidethesplit-spoonsampler,whichallowedselectedsamplestobecappedandsealed.Followingcompletionofthehole,theaugerstringwaswithdrawnandtheholebackfilledwiththedrillcuttings.ThelogsfortheseholesaregiveninAppendixC-l.ThepropertiesoftheborrowmaterialsarediscussedinSection5.SeismicRefractionSurveysSeismicrefractionsurveys(seismiclines)wereperformedontheriverbanksatbothdamsites,andintheborrowareasandrelictchannelneartheWatanasitetoextendthepreviousstudies.Eleventraversestotalling27,800feetwererununderthisprogram,andtheresultsarepresentedinAppendixD.ThelocationsofthelinesarealsoshownonFigure5.1forWatanaandFigure5.2forDevilCanyon.AttheWatanadamsite,fourtraverseswereshotintheimmediatedamsite.Twooftheselinescrossedtherightabutmentandtherelictchannelarea.Athirdlineislocatedupstreamoftheproposedaxisonbothabutments,andthefourthinvestigatedatopographicde-pressionamileupstreamofthedamaxisonthenorthsideoftheriver.BorrowAreas0andEatWatanawereexploredbyfourseismiclines(twowithineacharea).AtDevilCanyon,thethreeseismiclineswererunontheleft(south)bankoftheriveracrossthesmalllakeandadjacentslopestoinves-tigatetheoverburdenthicknessintheproposedsaddledamareaandtheexistenceofapossibleshearzone.5-5 (c)LaboratoryTestingRepresentativesoilsamplesobtainedfromthepotentialborrowareasfortheWatanadamareaweretestedtodeterminetheirphysicalpropertiesverifyfieldclassification.Atotalof21samplesweretestedtodeter-minethesoil'smoisturecontent,Atterberglimits,grainsizedistributandModifiedProctordensity.AsummaryofthetestingprogramisgivenTable5.2.Alltwenty-onesamplesweretestedusingtheapplicableASTMAASHTOstandardprocedures.TheresultsofthetestingprogramaresummarizedandthedataispresentedinAppendixC-2.5-6(c)LaboratoryTestingRepresentativesoilsamplesobtainedfromthepotentialborrowareasfortheWatanadamareaweretestedtodeterminetheirphysicalpropertiesverifyfieldclassification.Atotalof21samplesweretestedtodeter-minethesoil'smoisturecontent,Atterberglimits,grainsizedistributandModifiedProctordensity.AsummaryofthetestingprogramisgivenTable5.2.Alltwenty-onesamplesweretestedusingtheapplicableASTMAASHTOstandardprocedures.TheresultsofthetestingprogramaresummarizedandthedataispresentedinAppendixC-2.5-6 TABLE5.1-SUMMARYOFOIAMONOORILLINGACTIVITY-19BOHOLEGROUNDLENGTHANGLEFROMNO.LOCATIONELEVATION,FT FTORIENTATIONHORIZONTALPURPOSEWatanaBH-2Right1,835401.0N45E55·FingerbusterAbutmentshearzoneBH-6Right1,605740.4S45W60·PotentialAbutmentfaultunderriverBH-BLeft1,976750.55N60E60·PowerhouseAbutmentgeology,andesiteflowsDevilCanyonBH-1Right1,415750.3S45W67·PowerhouseAbutmentgeologyBH-2Right1,214656.2N60·DamAbutmentfoundationBH-4Left1,353501.0S15W60·SuspectedAbutmentshearzoneNote:DrillholelocationsareshownonFigure5.1(Watana)andFigureS.2(DevilCanyon)TABLE5.1-SUMMARYOFOIAMONOORILLINGACTIVITY-19BOHOLEGROUNDLENGTHANGLEFROMNO.LOCATIONELEVATION,FT FTORIENTATIONHORIZONTALPURPOSEWatanaBH-2Right1,835401.0N45E55·FingerbusterAbutmentshearzoneBH-6Right1,605740.4S45W60·PotentialAbutmentfaultunderriverBH-BLeft1,976750.55N60E60·PowerhouseAbutmentgeology,andesiteflowsDevilCanyonBH-1Right1,415750.3S45W67·PowerhouseAbutmentgeologyBH-2Right1,214656.2N60·DamAbutmentfoundationBH-4Left1,353501.0S15W60·SuspectedAbutmentshearzoneNote:DrillholelocationsareshownonFigure5.1(Watana)andFigureS.2(DevilCanyon) TABLE5.2-SUMMARYOFAUGERORILLINGACTIVITY-1980BorrowHoleOepthAreaNo.Ft.PurposeWatana0AH-D120Imperviousandsemi-AH-0229perviouscorematerialAH-D330.5AH-0415EAH-E125FilterandconcreteAH-E210aggregateAH-E320AH-E420AH-E510AH-E626.5AH-E75.5AH-E86AH-E98DevilCanyonGAH-G123ConcreteaggregateAH-G411NOTE:AugerholelocationsareshownonFigure5.1(Watana)andFigure5.2(OevilCanyon).TABLE5.2-SUMMARYOFAUGERORILLINGACTIVITY-1980BorrowHoleOepthAreaNo.Ft.PurposeWatana0AH-D120Imperviousandsemi-AH-0229perviouscorematerialAH-D330.5AH-0415EAH-E125FilterandconcreteAH-E210aggregateAH-E320AH-E420AH-E510AH-E626.5AH-E75.5AH-E86AH-E98DevilCanyonGAH-G123ConcreteaggregateAH-G411NOTE:AugerholelocationsareshownonFigure5.1(Watana)andFigure5.2(OevilCanyon). TABLE5.3-SUMMARYOFLABORATORYTESTINGNOTE:LaboratorytestresultsareincludedinAppendixC-2.TEST(PRoCEoURE)GrainSizeDistribution(ASTM:0422-63)Natural MoistureContent(ASTM:02216-71)LiquidLimit(ASTM:0423-66)PlasticityIndex(ASTM:0424-59)ModifiedProctorDensity(AASHTOT-160MethodnAn)(AASHToT-18oMethodnon)NUMBEROFTESTSWatanaDamSiteBorrowALeaDeadmanRlveraEHCreekChannel662 2662 26 226 22TABLE5.3-SUMMARYOFLABORATORYTESTINGNOTE:LaboratorytestresultsareincludedinAppendixC-2.TEST(PRoCEoURE)GrainSizeDistribution(ASTM:0422-63)Natural MoistureContent(ASTM:02216-71)LiquidLimit(ASTM:0423-66)PlasticityIndex(ASTM:0424-59)ModifiedProctorDensity(AASHTOT-160MethodnAn)(AASHToT-18oMethodnon)NUMBEROFTESTSWatanaDamSiteBorrowALeaDeadmanRlveraEHCreekChannel662 2662 26 226 22 CONTOURINTERVAL100FEETFIGURE5.1NOTES:J)TOPOGRAPHICCONTOURSAREAPPROXJMATE2)SECTIONSSHOWNONFIGURE6.5®AH-D3®AH-D2BORROWAREAD-+--/QUARRYoBORROWAREAF~WATANA-1980EXPLORATIONMAPJOINTMEASUREMENTSTATIONCROSSSECTION!:oWJBORROWAREAELEGENDACRESAMERICANINC.,19BOoBHBOREHOLEoAHAUGERHOLE~SEISMICLINElJNOTE:FORLOCATIONOFBORROWAREAC,SEEFIGUFiE6.9REFERENCE:U.S.ARMYCORPSOFENGINEERS,1979(18)CONTOURINTERVAL100FEETFIGURE5.1NOTES:J)TOPOGRAPHICCONTOURSAREAPPROXJMATE2)SECTIONSSHOWNONFIGURE6.5®AH-D3®AH-D2BORROWAREAD-+--/QUARRYoBORROWAREAF~WATANA-1980EXPLORATIONMAPJOINTMEASUREMENTSTATIONCROSSSECTION!:oWJBORROWAREAELEGENDACRESAMERICANINC.,19BOoBHBOREHOLEoAHAUGERHOLE~SEISMICLINElJNOTE:FORLOCATIONOFBORROWAREAC,SEEFIGUFiE6.9REFERENCE:U.S.ARMYCORPSOFENGINEERS,1979(18) JOINTMEASUREMENTSTATIONSEISMICUNESCROSSSECTIONLEGEND6DCJNOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)SECTIONSHOWNONFIGURE6.13ACRESAMERICANINC.,1980oBHBOREHOLE0AHAUGERHOLElJ._..-..-----.532533/7001600/700r-----------------------------~,'00REFERENCE:USGS,TALKEETNAMOUNTAINS,{D-5},ALASKAQUADRAflffiLE,SEWARDMERIDIAN:T32N,RIE,S32AND33.CONTOURINTERVAL50FEETDASHEDCONTOUR2.5FEETDEVILCANYON-1980EXPLORATIONMAPFIGURE5.21A~~mIJOINTMEASUREMENTSTATIONSEISMICUNESCROSSSECTIONLEGEND6DCJNOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)SECTIONSHOWNONFIGURE6.13ACRESAMERICANINC.,1980oBHBOREHOLE0AHAUGERHOLElJ._..-..-----.532533/7001600/700r-----------------------------~,'00REFERENCE:USGS,TALKEETNAMOUNTAINS,{D-5},ALASKAQUADRAflffiLE,SEWARDMERIDIAN:T32N,RIE,S32AND33.CONTOURINTERVAL50FEETDASHEDCONTOUR2.5FEETDEVILCANYON-1980EXPLORATIONMAPFIGURE5.21A~~mI NQ-Borehole(2.98"Diam.)PackerinflationlineandpiezometerreadouttubesPermafrostcementgroutEpoxy-filledNX-sizepackerThermistorpoints3/4-inchLD.jointPVCgrouttubeTYPICALINSTRUMENTATIONINSTALLATIONWATANA:BH-6DEVILCANYON:BH-2SlottedPVCr-f---pipetoprotectpiezometerHolesdrilledin~-~rr:.:PVCgrouttubetoallowgrouttoescape20'=B=y=:===;!;:::!?-~'N~!V1~'R~'~C~.=a.o;';['J;';o."=~::!J=:.,,;,~=:r::~;=.!'i=,.::~=:=:;=',.=::':':7:=.':=;'=L=E=======F=IG=U=R=E=5.=3=11A~~[~INQ-Borehole(2.98"Diam.)PackerinflationlineandpiezometerreadouttubesPermafrostcementgroutEpoxy-filledNX-sizepackerThermistorpoints3/4-inchLD.jointPVCgrouttubeTYPICALINSTRUMENTATIONINSTALLATIONWATANA:BH-6DEVILCANYON:BH-2SlottedPVCr-f---pipetoprotectpiezometerHolesdrilledin~-~rr:.:PVCgrouttubetoallowgrouttoescape20'=B=y=:===;!;:::!?-~'N~!V1~'R~'~C~.=a.o;';['J;';o."=~::!J=:.,,;,~=:r::~;=.!'i=,.::~=:=:;=',.=::':':7:=.':=;'=L=E=======F=IG=U=R=E=5.=3=11A~~[~I Thermistorpoints'no~PackerinflationlineandpiezometerreadouttubesNote:Twopiezometer/packerinstallationsweremadeinBH-lPermafrostcementgroutNX-sizeslimlinepackerFiltersandNOTTOSCALE~-l---PneumaticpiezometertipGround"-ihCh.I~D.PVCgrouttubeFoam.seal5-footslottedsection.Threerows0.10inchslotsTYPICALINSTRUMENTATIONINSTALLATIONDEVILCANYON:BH-landBH-4~~~----Grouttube0.010-2-inchI.D.threadedjointPVCcasing----~slotted_~IPOW~=B=y=:==:I=l:!?&~M~~C~O==N=:=:S""U=',"L.;"":r""A""""N==T'"S~,='=N='C==.=========F=IG=U=R=E=5=.4=1flUmuENOINr;eRS•OI!CLCOISTS"'LANNERSSU<:IV£YCl2SThermistorpoints'no~PackerinflationlineandpiezometerreadouttubesNote:Twopiezometer/packerinstallationsweremadeinBH-lPermafrostcementgroutNX-sizeslimlinepackerFiltersandNOTTOSCALE~-l---PneumaticpiezometertipGround"-ihCh.I~D.PVCgrouttubeFoam.seal5-footslottedsection.Threerows0.10inchslotsTYPICALINSTRUMENTATIONINSTALLATIONDEVILCANYON:BH-landBH-4~~~----Grouttube0.010-2-inchI.D.threadedjointPVCcasing----~slotted_~IPOW~=B=y=:==:I=l:!?&~M~~C~O==N=:=:S""U=',"L.;"":r""A""""N==T'"S~,='=N='C==.=========F=IG=U=R=E=5=.4=1flUmuENOINr;eRS•OI!CLCOISTS"'LANNERSSU<:IV£YCl2S RESULTSOFTHEGEOTECHNICALINVESTIGATIONS-WatanascussedinSection3,theWatanadamsitehadbeenexploredbypreviousigators(5,6,18,19).Thisinformationwasthenexpandedbythe1980nrrJoramusingdetailedgeologicmapping,threediamonddrillholes,augerholesseismicrefractionsurveys.Inaddition,airphotointerpretationwasper-fnr'me,d,coveringtheentiredamsiteandreservoirarea.ThelocationofallorationsareshownonFigure6.1.Discussionofresultsofinvestigationsoverburdenconditions,bedrockgeology,groundwater,permafrost,borrowalandreservoirgeologyarepresentedinthefollowingsections.OverburdenConditionsOverburdenthicknessinthedamsitearearangesfromnonexistentalongportionsofthevalleyslope,togreaterthan450feetawayfromthevalleywalls.Thetypeofoverburdenvariesfromweatheredrockandtalustoglaciallyderivedtills,outwash,andlacustrineclaystoorganicma-terials.Thetypeandthicknessofoverburdeninthesiteareahasbeendelineatedbygeologicmapping,drilling,excavationoftestpitsandseismicrefractionsurveys.AdetaileddiscussionofsoilconditionsandpropertiesinselectedborrowsourceareasispresentedinSection6.1(e).AnisopachmapofoverburdenthicknessisshowninFigure6.2.Ingeneral,theoverburdenanthevalleywallsandabutmentsattheWatanasiteisthin,varyinginthicknessfrom0toabout10feet.Onthelowerslopes,intheV-shapedportionofthevalley,overburdenisalmostnonexistent,consistingprimarilyoftalus.Abovethebreakinslopeanthenorthsideoftheriver,theoverburdenthickensandconsistsprimarilyofglacialmaterial.BoringsinDH-lthroughDH-5weredrilledtobedrockbytheCOEintheriverchannelwithinthedamarea,andshowalluviumthicknessontheorderof40to80feet.Thematerialconsistsofcoarsesands,gravelsandboul-ders.Severalbouldersmorethanthreefeetindiameterwereencounteredduringtheinvestigation.Therelativedensityanddistributionofthematerialisnotproperlyknown.Itissuspectedthatthesematerialsmaybecomeunstableduringaseismicevent.Furtherinvestigationswillbenecessarytoproperlyexplorethesedeposits.Severallocalareasofthickoverburdenwereencounteredanbothdamabut-mentsduringthevariousphasesofinvestigation.SeismiclineSW-2(Figure6.1)showsathickeningofoverburdentoapproximately100feetupslopeofBH-2.AsimilarthickpocketofoverburdenwasfoundonthesouthabutmentatDH-25(COE,1978)(Figure6.1)whereadepthofover55feetofglacialandalluvialmaterialsweredrilledwithoutreachingbedrock.Awayfromthevalley,theoverburdenconsistsprincipallyofglacialsilts,sands,gravelsandboulders.Wheredrilled,thecontactbetweentheover-burdenandbedrockissharp.Seismicvelocityoftheunconsolidatedsilts,6-1RESULTSOFTHEGEOTECHNICALINVESTIGATIONS-WatanascussedinSection3,theWatanadamsitehadbeenexploredbypreviousigators(5,6,18,19).Thisinformationwasthenexpandedbythe1980nrrJoramusingdetailedgeologicmapping,threediamonddrillholes,augerholesseismicrefractionsurveys.Inaddition,airphotointerpretationwasper-fnr'me,d,coveringtheentiredamsiteandreservoirarea.ThelocationofallorationsareshownonFigure6.1.Discussionofresultsofinvestigationsoverburdenconditions,bedrockgeology,groundwater,permafrost,borrowalandreservoirgeologyarepresentedinthefollowingsections.OverburdenConditionsOverburdenthicknessinthedamsitearearangesfromnonexistentalongportionsofthevalleyslope,togreaterthan450feetawayfromthevalleywalls.Thetypeofoverburdenvariesfromweatheredrockandtalustoglaciallyderivedtills,outwash,andlacustrineclaystoorganicma-terials.Thetypeandthicknessofoverburdeninthesiteareahasbeendelineatedbygeologicmapping,drilling,excavationoftestpitsandseismicrefractionsurveys.AdetaileddiscussionofsoilconditionsandpropertiesinselectedborrowsourceareasispresentedinSection6.1(e).AnisopachmapofoverburdenthicknessisshowninFigure6.2.Ingeneral,theoverburdenanthevalleywallsandabutmentsattheWatanasiteisthin,varyinginthicknessfrom0toabout10feet.Onthelowerslopes,intheV-shapedportionofthevalley,overburdenisalmostnonexistent,consistingprimarilyoftalus.Abovethebreakinslopeanthenorthsideoftheriver,theoverburdenthickensandconsistsprimarilyofglacialmaterial.BoringsinDH-lthroughDH-5weredrilledtobedrockbytheCOEintheriverchannelwithinthedamarea,andshowalluviumthicknessontheorderof40to80feet.Thematerialconsistsofcoarsesands,gravelsandboul-ders.Severalbouldersmorethanthreefeetindiameterwereencounteredduringtheinvestigation.Therelativedensityanddistributionofthematerialisnotproperlyknown.Itissuspectedthatthesematerialsmaybecomeunstableduringaseismicevent.Furtherinvestigationswillbenecessarytoproperlyexplorethesedeposits.Severallocalareasofthickoverburdenwereencounteredanbothdamabut-mentsduringthevariousphasesofinvestigation.SeismiclineSW-2(Figure6.1)showsathickeningofoverburdentoapproximately100feetupslopeofBH-2.AsimilarthickpocketofoverburdenwasfoundonthesouthabutmentatDH-25(COE,1978)(Figure6.1)whereadepthofover55feetofglacialandalluvialmaterialsweredrilledwithoutreachingbedrock.Awayfromthevalley,theoverburdenconsistsprincipallyofglacialsilts,sands,gravelsandboulders.Wheredrilled,thecontactbetweentheover-burdenandbedrockissharp.Seismicvelocityoftheunconsolidatedsilts,6-1 6-2isunderlainbyaseriesofsedimentary,volcanicTheserockshavenotbeenassignedformationalbeengivenlithologicnamesformappingandTheWatanasiteplutonicrocks.butratherhavecorrelation.Thedamsiteisprimarilyunderlainbyanintrusivedioriticbodywhichrangesincompositionfromgranodioritetoquartzdioritediorite(Figure6.3,sheet1).Thevolcanicrocks(daciteandandesite)aregenerallyfinergrainedequivalentsoftheseintrusirockswithafewmoresilicicvarieties(rhyolite).Thesedirocksconsistoftuffaceoussiltstones,sandstonesandgraywackes.IgneousIntrusivessandsandgravelsgenerallyaverage6,000to7,000ft/secwhereasthedensertills,boulders,andweatheredrockrangebetween13,000to14,ft/sec.Thequartzdioriteislightgrayincolorandisfoundprimarilystreamfromthedamcenterline.Grainsizeismedium(1-5mm)butvariablewithinthisrange.Thequartzdioriteiscomposedof6080percentplagioclasefeldsparwithapproximately5percentMaficmineralsarepredominantlybiotitewithpartiallychlorhornblende.Thetextureismassive,withnoplanarstructures.rockishard,competentandfresh,exceptwithintheshearzonesAdeepbedrockdepressionhasbeendelineatedonthenorthsideoftheriverextendingfromabout2,500feetwestofDeadmanCreeknorthwesttowardTsusenaCreek.Theevidenceforthischannelisbasedonseismirefractionstudies(14,18,20)andseveraldrillholesasshownonFi6.1.Thelowestbedrockelevationencounteredinthechannelwas1,feetor454feetbelowthesurface(DR-22).Theoverburdenintheburichannelconsistsofthreemajorsequencesoftill,lacustrineandall(includingoutwash)materials.Atleasttwosequencesoffinegrainedlacustrinematerialhavebeenencountered.InDR-13,theCOEreportedencounteringasignificantartesiancondition.However,thesourceofartesianpressureandwaterpressurereliefspringsonthecliffswasaddressed.Inanotherboring,DR-22,a200-footintervalofperviousandgravelswasencounteredatelevation2,000(230feetbelowgroundsurface).DiscussionswiththeCOErevealedthatduringafallingpermeabilitytestontheintervalcomposedofthesematerials,takesashighas50gpm/footofheadwererecorded.Basedonlimitedinformatithestratigraphy,itisverydifficulttodrawconclusionsonwhethertill,glacialmaterialoroutwashdepositsarecontinuousoverlargeAreasonableassessmentoftheoverallpermeabilityofthechannelmaterialsisnotpossibleatthistime.Furtherexplorationinthisisnecessary.(b)BedrockGeology(i)Lithology6-2isunderlainbyaseriesofsedimentary,volcanicTheserockshavenotbeenassignedformationalbeengivenlithologicnamesformappingandTheWatanasiteplutonicrocks.butratherhavecorrelation.Thedamsiteisprimarilyunderlainbyanintrusivedioriticbodywhichrangesincompositionfromgranodioritetoquartzdioritediorite(Figure6.3,sheet1).Thevolcanicrocks(daciteandandesite)aregenerallyfinergrainedequivalentsoftheseintrusirockswithafewmoresilicicvarieties(rhyolite).Thesedirocksconsistoftuffaceoussiltstones,sandstonesandgraywackes.IgneousIntrusivessandsandgravelsgenerallyaverage6,000to7,000ft/secwhereasthedensertills,boulders,andweatheredrockrangebetween13,000to14,ft/sec.Thequartzdioriteislightgrayincolorandisfoundprimarilystreamfromthedamcenterline.Grainsizeismedium(1-5mm)butvariablewithinthisrange.Thequartzdioriteiscomposedof6080percentplagioclasefeldsparwithapproximately5percentMaficmineralsarepredominantlybiotitewithpartiallychlorhornblende.Thetextureismassive,withnoplanarstructures.rockishard,competentandfresh,exceptwithintheshearzonesAdeepbedrockdepressionhasbeendelineatedonthenorthsideoftheriverextendingfromabout2,500feetwestofDeadmanCreeknorthwesttowardTsusenaCreek.Theevidenceforthischannelisbasedonseismirefractionstudies(14,18,20)andseveraldrillholesasshownonFi6.1.Thelowestbedrockelevationencounteredinthechannelwas1,feetor454feetbelowthesurface(DR-22).Theoverburdenintheburichannelconsistsofthreemajorsequencesoftill,lacustrineandall(includingoutwash)materials.Atleasttwosequencesoffinegrainedlacustrinematerialhavebeenencountered.InDR-13,theCOEreportedencounteringasignificantartesiancondition.However,thesourceofartesianpressureandwaterpressurereliefspringsonthecliffswasaddressed.Inanotherboring,DR-22,a200-footintervalofperviousandgravelswasencounteredatelevation2,000(230feetbelowgroundsurface).DiscussionswiththeCOErevealedthatduringafallingpermeabilitytestontheintervalcomposedofthesematerials,takesashighas50gpm/footofheadwererecorded.Basedonlimitedinformatithestratigraphy,itisverydifficulttodrawconclusionsonwhethertill,glacialmaterialoroutwashdepositsarecontinuousoverlargeAreasonableassessmentoftheoverallpermeabilityofthechannelmaterialsisnotpossibleatthistime.Furtherexplorationinthisisnecessary.(b)BedrockGeology(i)Lithology BedrockStructure).Thereisgenerallyaverythinweatheringrindonexposedsurfaces.Inclusionsofargillite,volcanicsandfinegraineddioritearefoundinthisunit,particularlyeastof"TheFins".Thedioriteisdarkgrayishgreen,mediumgrainedandmassive.TherockisHOto90percentplagioclasefeldsparwith10to20percentbiotite.Thedioriteishard,competentandgenerallyfreshwithaverythinweatheringrindonexposedsurfaces.Noinclusionshavebeenseeninthediorite.Thequartzdioriteanddioriteappeartooccurinalternatingzonesontheorderofseveralhundredfeetwide.Onecontactisexposedonthe'riverandisgradationaloverabout20feetwithnofracturing,althoughatanotheroutcrop,thecontactiscoincidentwithafracture.Boththedioriteandquartzdioritehavebeenintrudedbyafewfelsicandmaficdikes.Thefelsicdikesarefinegrainedgranodioriteandarelessthantwofeetwide.Bothdeformedandundeformeddikesweremapped.Thecontactwiththesurroundingrockistight.Neitherthedikesorthecontactsarefractured;althoughsomedikeshavebeenoffsetbyhealedshears(seeBedrockStructure).Amaficdikewasmappeddownstreamof"TheFins"onthesouthabutmentatriverlevel.Thedikeisapproximately5feetwideandconsistsoffinegraineddiorite.Thedikeishighlyfracturedandlieswithinatalus-filledgully.Thediketrendsnorthwest-southeast,paralleltothemajorjointset.Alargemaficstructure(350to400feetwide)dioriticincompositionintrudedthequartzdioritein"TheFins"area.Thetextureisporphyriticwithafinegrainedtoaphaniticgroundmass.Basedontexture,therockisanandesiteporphyrytoadioriteporphyry.Tosimplifyterminology,thetermdioriteporphyrywillbeused.Phenocrystsconsistofplagioclasefeldsparandhorn-blende.Feldsparphenocrystsaremediumgrainedandfrom10percentoftherockat"TheFins"to20to30percentatoutcropsonthesouthbank.Thehornblendephenocrystsaremediumgrainedanocompriseabout5percentoftherock.Therockisgenerallymassivewithrareoccurrencesofcompositionallayering.Thedioriteporphyrybecomeslessporphyriticandmoreaphaniticnearthecontactswiththequartzdiorite.Inclusionswiththisunitcon-sistofroundedquartzdioriteandtabularargillitefragmentsfrom1to6incheslong.Contactswiththeinclusionsaresharpandtight.Thedioriteporphyryisfresh,hardandcompetent.Thecontactbe-tweenthedioriteporphyryandthequartzdioriteisshearedat"TheFins";however,onthesouthbank,bothrocktypesareseparatedbyonlyafewfeet.Sincethecontactiscovered,noevidenceofshear-ingcouldbeseen.Itislikelythatthecontactcouldbefractured.Downstreamfromthediorite/quartzdiorite,andapproximately3000feetdownstreamfromtheproposedcenterline,isaseriesofextrusiverocksrangingincompositionfromrhyolitetoandesiteandbasaltbut6-3BedrockStructure).Thereisgenerallyaverythinweatheringrindonexposedsurfaces.Inclusionsofargillite,volcanicsandfinegraineddioritearefoundinthisunit,particularlyeastof"TheFins".Thedioriteisdarkgrayishgreen,mediumgrainedandmassive.TherockisHOto90percentplagioclasefeldsparwith10to20percentbiotite.Thedioriteishard,competentandgenerallyfreshwithaverythinweatheringrindonexposedsurfaces.Noinclusionshavebeenseeninthediorite.Thequartzdioriteanddioriteappeartooccurinalternatingzonesontheorderofseveralhundredfeetwide.Onecontactisexposedonthe'riverandisgradationaloverabout20feetwithnofracturing,althoughatanotheroutcrop,thecontactiscoincidentwithafracture.Boththedioriteandquartzdioritehavebeenintrudedbyafewfelsicandmaficdikes.Thefelsicdikesarefinegrainedgranodioriteandarelessthantwofeetwide.Bothdeformedandundeformeddikesweremapped.Thecontactwiththesurroundingrockistight.Neitherthedikesorthecontactsarefractured;althoughsomedikeshavebeenoffsetbyhealedshears(seeBedrockStructure).Amaficdikewasmappeddownstreamof"TheFins"onthesouthabutmentatriverlevel.Thedikeisapproximately5feetwideandconsistsoffinegraineddiorite.Thedikeishighlyfracturedandlieswithinatalus-filledgully.Thediketrendsnorthwest-southeast,paralleltothemajorjointset.Alargemaficstructure(350to400feetwide)dioriticincompositionintrudedthequartzdioritein"TheFins"area.Thetextureisporphyriticwithafinegrainedtoaphaniticgroundmass.Basedontexture,therockisanandesiteporphyrytoadioriteporphyry.Tosimplifyterminology,thetermdioriteporphyrywillbeused.Phenocrystsconsistofplagioclasefeldsparandhorn-blende.Feldsparphenocrystsaremediumgrainedandfrom10percentoftherockat"TheFins"to20to30percentatoutcropsonthesouthbank.Thehornblendephenocrystsaremediumgrainedanocompriseabout5percentoftherock.Therockisgenerallymassivewithrareoccurrencesofcompositionallayering.Thedioriteporphyrybecomeslessporphyriticandmoreaphaniticnearthecontactswiththequartzdiorite.Inclusionswiththisunitcon-sistofroundedquartzdioriteandtabularargillitefragmentsfrom1to6incheslong.Contactswiththeinclusionsaresharpandtight.Thedioriteporphyryisfresh,hardandcompetent.Thecontactbe-tweenthedioriteporphyryandthequartzdioriteisshearedat"TheFins";however,onthesouthbank,bothrocktypesareseparatedbyonlyafewfeet.Sincethecontactiscovered,noevidenceofshear-ingcouldbeseen.Itislikelythatthecontactcouldbefractured.Downstreamfromthediorite/quartzdiorite,andapproximately3000feetdownstreamfromtheproposedcenterline,isaseriesofextrusiverocksrangingincompositionfromrhyolitetoandesiteandbasaltbut6-3 6-4Jointdatawasrecordedatalloutcrops,aswellasat10jointstations(WJ-lthroughWJ-I0)whichwerechosenfordetailedjointmeasurements(Figure6.3,sheet2).Atbothoutcropandjointstations,theorientationofmajorandminorjointsetswererp~nrdaswellastheconditionofthejointsurface,spacingandanymineralizationorcoating.Atoutcrops,threeorientationswereofjointsfromeachjointsetandanaveragereadingrecorded.Jointsispredominantlyandesiteporphyry.Whereexposedonthebanksofriver,theserocksarecomplexlyfaulted.Fieldrelationshipsindicatethattheremaybemorethanoneepisodeofextrusiveactivitydeformation.Atthisphaseofmapping,nostratigraphicrelationshcouldbedeterminedandsotheserockshaveallbeenincludedasunit:andesiteporphyry.Theandesiteporphyryismediumtodarkgraytogreenwithanaphaniticgroundmassandfine(lessthan1mm)tomediumgrainedfeldsparphenocrysts.InclusionsofquartzdioritearefoundinandesiteporphyrynearQuarryA.Nearthecontactwiththedioritherockisamonzoniteincompositionbutbecauseoftheaphanitictextureistermedalatite.Thelatiteislighttomediumgrayishgreenwithnumerousinclusion~ofargilliteandquartzdiorite,thecontactsbeingsharpandtight.Thelatiteisflowbandedwith1strikingnorthwest-southeastanddipping15°west.Thecontactwithedioriteiscoincidentwiththemain"Fingerbuster"shearzone.Othervariationsinthisunitincluderhyolitic,andbasalticunitsThemoremaficrocksappeartobeprevalenttowardthewest.ThecontactbetweentheandesiteflowandthedioritewasinBH-2andBH-8(Figures6.4and6.5).SimilarlytheCOEboriDH-21andDH-24penetratedandesitedikesontheleftabutment.natureofthecontactinBH-2isunclear,inthatasecondaryshearzonecorrespondswiththiscontact,resultinginpoorqualityrock.ThecontactinBH-8wasintersectedatadepthofapproximately50feet.Therockinthiszonewashighlyfracturedandjointedwithclayseamsextendingoveradistanceof10to15feet.Corewasontheorderof70to80percent.Asequenceoftuffaceoussiltstoneandsandstonesareexposedincliffsapproximately5,000feetdownstreamofthedamsiteandareoverlainbytheandesitic(basaltic)rocks(Figure6.3).Thesesedmentaryrocksarecomposedessentiallyofvolcanicdebris,thesilstonebeingamediumgray,finegrainedrockthatexhibitssomeshcharacteronweathering,whilethesandstonehasabuffcoloredgroundmasswithinclusionsoffeldspar,quartz,andargillite.Therockintheareaisgenerallysoundandslightlyweathered.(ii)BedrockStructure6-4Jointdatawasrecordedatalloutcrops,aswellasat10jointstations(WJ-lthroughWJ-I0)whichwerechosenfordetailedjointmeasurements(Figure6.3,sheet2).Atbothoutcropandjointstations,theorientationofmajorandminorjointsetswererp~nrdaswellastheconditionofthejointsurface,spacingandanymineralizationorcoating.Atoutcrops,threeorientationswereofjointsfromeachjointsetandanaveragereadingrecorded.Jointsispredominantlyandesiteporphyry.Whereexposedonthebanksofriver,theserocksarecomplexlyfaulted.Fieldrelationshipsindicatethattheremaybemorethanoneepisodeofextrusiveactivitydeformation.Atthisphaseofmapping,nostratigraphicrelationshcouldbedeterminedandsotheserockshaveallbeenincludedasunit:andesiteporphyry.Theandesiteporphyryismediumtodarkgraytogreenwithanaphaniticgroundmassandfine(lessthan1mm)tomediumgrainedfeldsparphenocrysts.InclusionsofquartzdioritearefoundinandesiteporphyrynearQuarryA.Nearthecontactwiththedioritherockisamonzoniteincompositionbutbecauseoftheaphanitictextureistermedalatite.Thelatiteislighttomediumgrayishgreenwithnumerousinclusion~ofargilliteandquartzdiorite,thecontactsbeingsharpandtight.Thelatiteisflowbandedwith1strikingnorthwest-southeastanddipping15°west.Thecontactwithedioriteiscoincidentwiththemain"Fingerbuster"shearzone.Othervariationsinthisunitincluderhyolitic,andbasalticunitsThemoremaficrocksappeartobeprevalenttowardthewest.ThecontactbetweentheandesiteflowandthedioritewasinBH-2andBH-8(Figures6.4and6.5).SimilarlytheCOEboriDH-21andDH-24penetratedandesitedikesontheleftabutment.natureofthecontactinBH-2isunclear,inthatasecondaryshearzonecorrespondswiththiscontact,resultinginpoorqualityrock.ThecontactinBH-8wasintersectedatadepthofapproximately50feet.Therockinthiszonewashighlyfracturedandjointedwithclayseamsextendingoveradistanceof10to15feet.Corewasontheorderof70to80percent.Asequenceoftuffaceoussiltstoneandsandstonesareexposedincliffsapproximately5,000feetdownstreamofthedamsiteandareoverlainbytheandesitic(basaltic)rocks(Figure6.3).Thesesedmentaryrocksarecomposedessentiallyofvolcanicdebris,thesilstonebeingamediumgray,finegrainedrockthatexhibitssomeshcharacteronweathering,whilethesandstonehasabuffcoloredgroundmasswithinclusionsoffeldspar,quartz,andargillite.Therockintheareaisgenerallysoundandslightlyweathered.(ii)BedrockStructure Jointstationswerechosenatrepresentativeareashavinggoodthreedimensionalexposureofmajorstructures,"TheFins"and"Finger-buster",TsusenaCreek,andinthemajorrocktypes:quartzdiorite,dioriteandandesiteporphyries.AtstationsWJ-lthrough3,readingswerelimitedto60to86jointsduetolimitedexposure.OnehundredjointswererecordedatstationsWJ-4throughWJ-I0.Foreachsta-tion,jointmeasurementswereplottedonthelowerhemisphereofaSchmidtequal-areastereonetandcontouredat3,5,7,10and15per-centcontourintervals.AnexampleillustratingthemethodologyispresentedonFigure6.6a.WatanajointstationsareshownonFigures6.6(b-k).Acompositestereonetof766jointswasalsocompiledandisincludedasFigure6.6(1).Twomajorandfourminorjointsetsweremappedatthesite.SetIandSetIIaremajorjointswhichoccurthroughoutthesitearea.SetsIIIandIVareminorsetswhichgenerallyarelessprominentthanthemajorsetsbutmaylocallybequitepronounced,whileSetsVandVIdonotshowprominentlyoveranyextent.Table6.1isasummaryofjointsetorientations,spacing,surfaceconditionandstructuralrelationsatWatana.JointSetIisthemostprominentsetatWatana.Theorientationisabout320·(N40·W)throughoutmostofthesitewithdipsfrom65·northeastto70·southwestandaveragingnearvertical.Jointsur-facesareplanartoslightlycurvedandmostlysmooth,withspacingfromonetotwofeet.Openjointsurfacesintheandesiteprophyryin"TheFins"arepittedandroughwherefeldsparandhornblendephenocystshavebeenweatheredout.MinorcarbonatecoatingwasobservedonthissetonlyatWJ-6andWJ-I0.Thejointsaregenerallyclosed,exceptinshearandfracturezones.SetIjointsareparalleltothemajorshearandfracturezonesinthedamsitearea.SetIjointsshowaconsistenttrendthroughoutthedamsitefromWJ-2upstreamto"TheFins".DownstreamfromWJ-2,thetrendchangesto335·(N25·W).JointSetIIgenerallytrends45·(N45·E)anddipsbetween70·north-westand70·southeast.Spacingaverages6inchesto1foot.Sur-facesaresmoothandplanartoslightlycurved.Minorcarbonatecoat-ingisfoundonthissetat"TheFins"andatWJ-I0.TheriverrunsparalleltothissetbetweenWJ-8andWJ-5.NoshearinghasbeenfoundassociatedwithSetII.JointSetIIIisnorth-southtrendingwithmoderatedipstotheeastandwest.ThissetisgenerallypresentthroughoutthesitebutisnotasprominentasSetsIandII.Spacingisquitevariableandcanrangefrom2inchesto5feetwherepresent.Jointsurfacesareplanartoslightlycurvedandsmoothtorough.Nomineralizationisassociatedwiththisset.SetIIIisparalleltothenorth-southtrendingshearsfoundat"TheFins",Fingerbuster,WJ-I0,WJ-8,andWJ-7.WestdippingSetIIIjointspredominatewherethenorth-southshearsarewestdippingasatWJ-2,6, 7,8and10ontheeasternandcentralareasofthesite.EastdippingSetIIIjointspredominatewherethenorth-south.shearsareeastdippingasatWJ-land9onthewesternareaofthesite.6-5Jointstationswerechosenatrepresentativeareashavinggoodthreedimensionalexposureofmajorstructures,"TheFins"and"Finger-buster",TsusenaCreek,andinthemajorrocktypes:quartzdiorite,dioriteandandesiteporphyries.AtstationsWJ-lthrough3,readingswerelimitedto60to86jointsduetolimitedexposure.OnehundredjointswererecordedatstationsWJ-4throughWJ-I0.Foreachsta-tion,jointmeasurementswereplottedonthelowerhemisphereofaSchmidtequal-areastereonetandcontouredat3,5,7,10and15per-centcontourintervals.AnexampleillustratingthemethodologyispresentedonFigure6.6a.WatanajointstationsareshownonFigures6.6(b-k).Acompositestereonetof766jointswasalsocompiledandisincludedasFigure6.6(1).Twomajorandfourminorjointsetsweremappedatthesite.SetIandSetIIaremajorjointswhichoccurthroughoutthesitearea.SetsIIIandIVareminorsetswhichgenerallyarelessprominentthanthemajorsetsbutmaylocallybequitepronounced,whileSetsVandVIdonotshowprominentlyoveranyextent.Table6.1isasummaryofjointsetorientations,spacing,surfaceconditionandstructuralrelationsatWatana.JointSetIisthemostprominentsetatWatana.Theorientationisabout320·(N40·W)throughoutmostofthesitewithdipsfrom65·northeastto70·southwestandaveragingnearvertical.Jointsur-facesareplanartoslightlycurvedandmostlysmooth,withspacingfromonetotwofeet.Openjointsurfacesintheandesiteprophyryin"TheFins"arepittedandroughwherefeldsparandhornblendephenocystshavebeenweatheredout.MinorcarbonatecoatingwasobservedonthissetonlyatWJ-6andWJ-I0.Thejointsaregenerallyclosed,exceptinshearandfracturezones.SetIjointsareparalleltothemajorshearandfracturezonesinthedamsitearea.SetIjointsshowaconsistenttrendthroughoutthedamsitefromWJ-2upstreamto"TheFins".DownstreamfromWJ-2,thetrendchangesto335·(N25·W).JointSetIIgenerallytrends45·(N45·E)anddipsbetween70·north-westand70·southeast.Spacingaverages6inchesto1foot.Sur-facesaresmoothandplanartoslightlycurved.Minorcarbonatecoat-ingisfoundonthissetat"TheFins"andatWJ-I0.TheriverrunsparalleltothissetbetweenWJ-8andWJ-5.NoshearinghasbeenfoundassociatedwithSetII.JointSetIIIisnorth-southtrendingwithmoderatedipstotheeastandwest.ThissetisgenerallypresentthroughoutthesitebutisnotasprominentasSetsIandII.Spacingisquitevariableandcanrangefrom2inchesto5feetwherepresent.Jointsurfacesareplanartoslightlycurvedandsmoothtorough.Nomineralizationisassociatedwiththisset.SetIIIisparalleltothenorth-southtrendingshearsfoundat"TheFins",Fingerbuster,WJ-I0,WJ-8,andWJ-7.WestdippingSetIIIjointspredominatewherethenorth-southshearsarewestdippingasatWJ-2,6, 7,8and10ontheeasternandcentralareasofthesite.EastdippingSetIIIjointspredominatewherethenorth-south.shearsareeastdippingasatWJ-land9onthewesternareaofthesite.6-5 ShearsandFractures6-6Majorshearsandfracturesareorientedonanorthwesttrendwithsteepdipsfrom70'northeasttoBO'southwest.Thesefeatureste~toformdeepgulliesontheabutmentsasaresultoferosionofth)shearedandfracturedrock.Minorshearsandfracturesareorient~north-southwithmoderatedipstotheeastandwest,andeast-westdippingsteeplynorthandsouth.Theseorientationsareparallel\majorjointSetsIandIIandminorSetIII.averagetrendofabout65'(N65'E)withdipsbeand60'southeast.Noshearswereobservedpa~BetweenWJ-BandWJ-10,theriverisparalleljThesecondtypeofshear,whichismorecommon,isfoundinallth~rockunitsandconsistsofplanarareasofcrushedrock(sand-sizegrains)andgougewhichisseverelyweathered.Theseareasarege~erallylessthan6incheswide,butcanbemorethan20feetatthemajorshears.Thecrushedrockandgougeisgenerallybutnotalw1withinazoneoffracturedrockfrom1to2feetwide.Theamount,offsetontheseshearscouldgenerallynotbedeterminedbecauseo~lackofgoodmarkers.JointSetVIhasantween60'northwestalleltothisset.SetV!.JointSetIVconsistsofnumerouslowangle(dippinglessthan40')jointsofvariousorientations.Spacingishighlyvariableranginifrom1inchto10feetwithanaverageof1foot.Jointsurfaces~irregularandroughwithnomineralizationorshearingassociated~them.Thejointdipdirectionsappearrelatedtoslopedipdirectjwithjointsonthenorthabutmentdippingsouthandthoseonthesdabutmentdippingnorth.SetIVjointsarepossiblystressrelief:jointsresultingfromglacialunloading.JointSetsVandVIappeatobeonlylocallyprominent..JointSetVisorientednearlyeast-westat280'(N80'W).SetVismostprominentatthewesternendofthedamsiteinthe"Finger-buster"area(WJ-9)andatWJ-1,2and10where"east-west"shearzonesaremoreprevalent.Betweenthe"Fingerbuster"andWJ-2,theriverisparalleltoSetV.Majorandminorshearsandfracturesweremappedatriverelevationthedamsitearea(Figure6.3,sheet2).Fracturesweredefinedasareasofveryclosetoclosespaced(lessthan2inchesto1foot)jointswherenorelativemovementhasoccurred.Fracturesrange~6inchesto50feetinwidthbutaregenerallylessthan3feet.Gthebasisofmappingcompletedtodate,itappearsthatseveralpe~iodsofjointingoccurredatthesite,withmostbeingformedprio~themajorshearingandsomeconcurrentwithoraftertheshearing.Twoformsofshearsweremapped.Thefirstarehealedshearsfoundthequartzdioriteanddiorite.Theserangefromlessthan1inchabout1.5feetandcontainbrecciawhichhasbeenhealedbyfinegrained,igneousmaterial.Offsetsmeasuredonthesefeatureswhentheycrossfelsicdikesareupto1foot.Thehealedrockishardcompetent.Theseminorfeatureshavetwobasicorientations-35'1(N35'E)dipping45to70'east,and300'(N60'W)dipping65'southlShearsandFractures6-6Majorshearsandfracturesareorientedonanorthwesttrendwithsteepdipsfrom70'northeasttoBO'southwest.Thesefeatureste~toformdeepgulliesontheabutmentsasaresultoferosionofth)shearedandfracturedrock.Minorshearsandfracturesareorient~north-southwithmoderatedipstotheeastandwest,andeast-westdippingsteeplynorthandsouth.Theseorientationsareparallel\majorjointSetsIandIIandminorSetIII.averagetrendofabout65'(N65'E)withdipsbeand60'southeast.Noshearswereobservedpa~BetweenWJ-BandWJ-10,theriverisparalleljThesecondtypeofshear,whichismorecommon,isfoundinallth~rockunitsandconsistsofplanarareasofcrushedrock(sand-sizegrains)andgougewhichisseverelyweathered.Theseareasarege~erallylessthan6incheswide,butcanbemorethan20feetatthemajorshears.Thecrushedrockandgougeisgenerallybutnotalw1withinazoneoffracturedrockfrom1to2feetwide.Theamount,offsetontheseshearscouldgenerallynotbedeterminedbecauseo~lackofgoodmarkers.JointSetVIhasantween60'northwestalleltothisset.SetV!.JointSetIVconsistsofnumerouslowangle(dippinglessthan40')jointsofvariousorientations.Spacingishighlyvariableranginifrom1inchto10feetwithanaverageof1foot.Jointsurfaces~irregularandroughwithnomineralizationorshearingassociated~them.Thejointdipdirectionsappearrelatedtoslopedipdirectjwithjointsonthenorthabutmentdippingsouthandthoseonthesdabutmentdippingnorth.SetIVjointsarepossiblystressrelief:jointsresultingfromglacialunloading.JointSetsVandVIappeatobeonlylocallyprominent..JointSetVisorientednearlyeast-westat280'(N80'W).SetVismostprominentatthewesternendofthedamsiteinthe"Finger-buster"area(WJ-9)andatWJ-1,2and10where"east-west"shearzonesaremoreprevalent.Betweenthe"Fingerbuster"andWJ-2,theriverisparalleltoSetV.Majorandminorshearsandfracturesweremappedatriverelevationthedamsitearea(Figure6.3,sheet2).Fracturesweredefinedasareasofveryclosetoclosespaced(lessthan2inchesto1foot)jointswherenorelativemovementhasoccurred.Fracturesrange~6inchesto50feetinwidthbutaregenerallylessthan3feet.Gthebasisofmappingcompletedtodate,itappearsthatseveralpe~iodsofjointingoccurredatthesite,withmostbeingformedprio~themajorshearingandsomeconcurrentwithoraftertheshearing.Twoformsofshearsweremapped.Thefirstarehealedshearsfoundthequartzdioriteanddiorite.Theserangefromlessthan1inchabout1.5feetandcontainbrecciawhichhasbeenhealedbyfinegrained,igneousmaterial.Offsetsmeasuredonthesefeatureswhentheycrossfelsicdikesareupto1foot.Thehealedrockishardcompetent.Theseminorfeatureshavetwobasicorientations-35'1(N35'E)dipping45to70'east,and300'(N60'W)dipping65'southl Twomajorshearzoneswhichwereidentifiedinpreviousstudiesandwereverifiedbythisinvestigationarelocatedupstreamanddown-streamoftheproposeddam.Theupstreamzone,called"TheFins"bytheCaE,isexposedonthenorthabutmentapproximately3,000feetup-streamoftheproposeddamaxis.Thefeatureoccursintheareaofthequartzdioriteandandesiteporphyrycontacts."TheFins"con-sistsofaseriesofshearsandfracturesinan800footwidearea.Thegulliesformedbytheshearsandfracturesareseparatedbynarrowintactrockbandsorribs,from5to50feetwide.Thetwoprimaryshearsarenorthwesttrendinganddip70'east.Theshearattheandesiteporphyry/quartzdioritecontactconsistsof10feetofcrushedrockandgouge.Theothershearispartiallycoveredbytalus,butappearstobeamaximumof50to60feetwide,estimatedbythewidthofthegully.Itislikelythatthisareaconsistsofseveralsmallershearsratherthanoneshearofthiswidth.Quartzandcarbonateveins(0.5inches)inthiszonecrosscuttheshearwith-outoffset.Upstreamfromthecontactshearisaseriesoffournorthwesttrendingshearsinan80footwidezoneofopenjointing.East-westandnorth-southtrendingshearsalsooccurin"TheFins".Thedipandwidthoftheeast-westshearsareuncertain.Thenorth-southshearsarelessthan1footwideanddip57'tothewest.Slickensidesoncarbonatecoatingindicateanobliquesenseofmove-ment.Thenorth-southshearsappeartoproject.acrosstheriverinthevicinityoftheupstreamcofferdamandalignwithgulliesonthesouthabutment.Anotherseriesofnorth-southstrikingshearsalsooccuracrosstheriverfrom"TheFins".TheCaEhasinferredacon-tinuationof"TheFins"shearzonetothesoutheast.Thisareawillbeinvestigatedduringthe1981summerprogram.ThetraceofthezonetothenorthwestmaycorrelatewithahighlyoxidizedandshearedgranodioriteoutcroponTsusenaCreek.Thisoutcrop,approximately325feetwide,whichhasundergonehydrothermalalteration,isalsocharacterizedbynorthwest,north-southandeastwesttrendingshearswithassociatedcrushedrockandgouge.Otherevidencewhichsupportsanorthwestcontinuationof"TheFins"isseenintheseismicrefrac-tionsurveysonthenorthbank,whichshowalowerbedrockvelocityassociatedwiththetraceofthisfeature(14,18,20).Thetraceofthefeaturealsocloselycoincideswithamorphologicdepression.Thesecondmajorshearzoneatthesite,calledthe"Fingerbuster"bytheCaE,islocated1,500feetdownstreamoftheproposeddamaxisonthenorthbank(Figure6.3).BH-2,whichintersectedthisfeature,drilledthroughapproximately100feetofhighlyfractured,shearedrockwhichcontainsclayseamsandgouge.Themajorshearatthe"Fingerbuster"iscoincidentwiththeandesiteporphyry/dioritecon-tact.Thesheartrendsnorthwestwithaverticaldip.Thisfeatureisintersectedbyaverticalnorth-southshear.Bothliewithinarubblefilledgullyapproximately40feetwideanddivergefurtherup-slope.Rockwithinthiszoneishighlyfracturedandmoderatelyweatheredwithseveral3inchshearsconsistingofsiltysandmateri-al.Slicksonthenorth-southshearindicateaverticalmovement.Theextentoftheseshearswillbedeterminedduringthe1981summerprogram.Minorshearsinthe"Fingerbuster"trendnorthwest,east-westandnorth-south.Theeast-wes~trendin9shearsdipfrom80'southto80'north,paralleltothestretchoftheriverbetweenthe"Fingerbuster"andthedamcenterline.6-7Twomajorshearzoneswhichwereidentifiedinpreviousstudiesandwereverifiedbythisinvestigationarelocatedupstreamanddown-streamoftheproposeddam.Theupstreamzone,called"TheFins"bytheCaE,isexposedonthenorthabutmentapproximately3,000feetup-streamoftheproposeddamaxis.Thefeatureoccursintheareaofthequartzdioriteandandesiteporphyrycontacts."TheFins"con-sistsofaseriesofshearsandfracturesinan800footwidearea.Thegulliesformedbytheshearsandfracturesareseparatedbynarrowintactrockbandsorribs,from5to50feetwide.Thetwoprimaryshearsarenorthwesttrendinganddip70'east.Theshearattheandesiteporphyry/quartzdioritecontactconsistsof10feetofcrushedrockandgouge.Theothershearispartiallycoveredbytalus,butappearstobeamaximumof50to60feetwide,estimatedbythewidthofthegully.Itislikelythatthisareaconsistsofseveralsmallershearsratherthanoneshearofthiswidth.Quartzandcarbonateveins(0.5inches)inthiszonecrosscuttheshearwith-outoffset.Upstreamfromthecontactshearisaseriesoffournorthwesttrendingshearsinan80footwidezoneofopenjointing.East-westandnorth-southtrendingshearsalsooccurin"TheFins".Thedipandwidthoftheeast-westshearsareuncertain.Thenorth-southshearsarelessthan1footwideanddip57'tothewest.Slickensidesoncarbonatecoatingindicateanobliquesenseofmove-ment.Thenorth-southshearsappeartoproject.acrosstheriverinthevicinityoftheupstreamcofferdamandalignwithgulliesonthesouthabutment.Anotherseriesofnorth-southstrikingshearsalsooccuracrosstheriverfrom"TheFins".TheCaEhasinferredacon-tinuationof"TheFins"shearzonetothesoutheast.Thisareawillbeinvestigatedduringthe1981summerprogram.ThetraceofthezonetothenorthwestmaycorrelatewithahighlyoxidizedandshearedgranodioriteoutcroponTsusenaCreek.Thisoutcrop,approximately325feetwide,whichhasundergonehydrothermalalteration,isalsocharacterizedbynorthwest,north-southandeastwesttrendingshearswithassociatedcrushedrockandgouge.Otherevidencewhichsupportsanorthwestcontinuationof"TheFins"isseenintheseismicrefrac-tionsurveysonthenorthbank,whichshowalowerbedrockvelocityassociatedwiththetraceofthisfeature(14,18,20).Thetraceofthefeaturealsocloselycoincideswithamorphologicdepression.Thesecondmajorshearzoneatthesite,calledthe"Fingerbuster"bytheCaE,islocated1,500feetdownstreamoftheproposeddamaxisonthenorthbank(Figure6.3).BH-2,whichintersectedthisfeature,drilledthroughapproximately100feetofhighlyfractured,shearedrockwhichcontainsclayseamsandgouge.Themajorshearatthe"Fingerbuster"iscoincidentwiththeandesiteporphyry/dioritecon-tact.Thesheartrendsnorthwestwithaverticaldip.Thisfeatureisintersectedbyaverticalnorth-southshear.Bothliewithinarubblefilledgullyapproximately40feetwideanddivergefurtherup-slope.Rockwithinthiszoneishighlyfracturedandmoderatelyweatheredwithseveral3inchshearsconsistingofsiltysandmateri-al.Slicksonthenorth-southshearindicateaverticalmovement.Theextentoftheseshearswillbedeterminedduringthe1981summerprogram.Minorshearsinthe"Fingerbuster"trendnorthwest,east-westandnorth-south.Theeast-wes~trendin9shearsdipfrom80'southto80'north,paralleltothestretchoftheriverbetweenthe"Fingerbuster"andthedamcenterline.6-7 Theminorshearzonesarefoundbetween"TheFins"andthe"Finge~buster".Neartheproposeddamcenterlineareaseriesofsteepl]dippingnorthwesttrendingfracturezonesandnorth-southshearsWdipsof40'to85'totheeast.Theshearsaverage1to2feetwXMovementofthe40'dipshearwasestimatedtobeabout1footbasonjointsoffsetacrosstheshear.UpstreamonthesouthabutmentanotherzoneofpredominatlynorthwesttrendingshearsandfracturiTheextentofboththisfeatureandtheoneatcenterlinewillbeeltracedduringthe1981summerprogram..(iii)RockQualityTheRockQualityDesignation(KQD)wasdeterminedforallrockconandisgraphicallyshownontheSummaryLogsinAppendixB-1.TherockqualityencounteredinthedrillingwasgenerallygoodtoeX3cellentwithRQD'saveragingbetween75andgOpercent(seeTablel6.2).Ingeneral,rockqualityimproveswithdepth,withtheuppeto80feetofthesurfacebeingweatheredandmorefractured.Belthisweatheredzone,rockqualitytendstoimprovewithonlylocalzonesoffracturedandshearedrock.Thesezonesgenerallyrange'lthicknessfrom1to5feet,butcanbeupto30feet.ThepoorestqualityrockwasfoundinBH-2whichdrilledthrough~ofthe"Fingerbuster"shearzone.ThisboringwassitedwithinttlzoneanddirectedN45'Eataninclinationof55'.Asseeninthe;1inglogs,theshearzonewasintersectedatanapproximatedepthgfeetandcontinuedtoanapproximateholelengthof100feet(ver~depth65to80feet).Thezone,whichcorrespondswiththeandes)dioritecontact,consistsofhighlyfractured,severelyweathered;1brecciatedandshearedrock.Repeatedgroutingwasrequiredtom~tainholestability.Belowthiszone,rockqualityimprovedwithC!localizedzonesoflowRQD'sencounteredaround200to210and250feetdepths,respectively.Ingeneral,weatheringappearstobeprimarilyphysicalinnature;1withsandrockbeingaffectedtoabout40feetfromthesurfacea~damsite.Theweatheringis1ighttomoderateinjoints,withpentrationgenerallylessthanafewinchesintotheunbrokenrock.!cIShearedandfracturedzonesareconsiderablymoreweathered,andmoftheshearzonesexhibitchemicalweatheringandhydrothermala]ation.However,theseveresteffectsofchemicalalterationapp~Dlyarelimitedtotheimmediateshearzones,sotheoverallrockmqualityisquitegood,andappearstobeentirelyadequateforcogstructionoflargehydropowerstructuresutilizingconventional.constructionmethods.RockPermeabilityI,II6-8Waterpressuretestswereperformedinalloftheborings,howeve~testingwasperformedbelow650feetinBH-6orbelow70feetin§duetounstableholeconditions.Graphicrepresentationofthec~latedpermeabilitiesareshownontheSummaryLogs(AppendixB-l):1Overall,rockpermeabilityisrelativelylow,rangingfrom10-4tq10-6cm/sec.Waterlossesweresomewhathigherintheshallower(iv)Theminorshearzonesarefoundbetween"TheFins"andthe"Finge~buster".Neartheproposeddamcenterlineareaseriesofsteepl]dippingnorthwesttrendingfracturezonesandnorth-southshearsWdipsof40'to85'totheeast.Theshearsaverage1to2feetwXMovementofthe40'dipshearwasestimatedtobeabout1footbasonjointsoffsetacrosstheshear.UpstreamonthesouthabutmentanotherzoneofpredominatlynorthwesttrendingshearsandfracturiTheextentofboththisfeatureandtheoneatcenterlinewillbeeltracedduringthe1981summerprogram..(iii)RockQualityTheRockQualityDesignation(KQD)wasdeterminedforallrockconandisgraphicallyshownontheSummaryLogsinAppendixB-1.TherockqualityencounteredinthedrillingwasgenerallygoodtoeX3cellentwithRQD'saveragingbetween75andgOpercent(seeTablel6.2).Ingeneral,rockqualityimproveswithdepth,withtheuppeto80feetofthesurfacebeingweatheredandmorefractured.Belthisweatheredzone,rockqualitytendstoimprovewithonlylocalzonesoffracturedandshearedrock.Thesezonesgenerallyrange'lthicknessfrom1to5feet,butcanbeupto30feet.ThepoorestqualityrockwasfoundinBH-2whichdrilledthrough~ofthe"Fingerbuster"shearzone.ThisboringwassitedwithinttlzoneanddirectedN45'Eataninclinationof55'.Asseeninthe;1inglogs,theshearzonewasintersectedatanapproximatedepthgfeetandcontinuedtoanapproximateholelengthof100feet(ver~depth65to80feet).Thezone,whichcorrespondswiththeandes)dioritecontact,consistsofhighlyfractured,severelyweathered;1brecciatedandshearedrock.Repeatedgroutingwasrequiredtom~tainholestability.Belowthiszone,rockqualityimprovedwithC!localizedzonesoflowRQD'sencounteredaround200to210and250feetdepths,respectively.Ingeneral,weatheringappearstobeprimarilyphysicalinnature;1withsandrockbeingaffectedtoabout40feetfromthesurfacea~damsite.Theweatheringis1ighttomoderateinjoints,withpentrationgenerallylessthanafewinchesintotheunbrokenrock.!cIShearedandfracturedzonesareconsiderablymoreweathered,andmoftheshearzonesexhibitchemicalweatheringandhydrothermala]ation.However,theseveresteffectsofchemicalalterationapp~Dlyarelimitedtotheimmediateshearzones,sotheoverallrockmqualityisquitegood,andappearstobeentirelyadequateforcogstructionoflargehydropowerstructuresutilizingconventional.constructionmethods.RockPermeabilityI,II6-8Waterpressuretestswereperformedinalloftheborings,howeve~testingwasperformedbelow650feetinBH-6orbelow70feetin§duetounstableholeconditions.Graphicrepresentationofthec~latedpermeabilitiesareshownontheSummaryLogs(AppendixB-l):1Overall,rockpermeabilityisrelativelylow,rangingfrom10-4tq10-6cm/sec.Waterlossesweresomewhathigherintheshallower(iv) portionoftheholes,andafewshearzones,suchasthoseencounteredinBH-2,tookhighquantitiesofwaterwithoutreturn.However,thesezonestendedtocave,andthereforecouldnotbeaccuratelytested.groundwaterregimeinthebedrockisconfinedtomovementalongfrac-andjointswithintherock.Waterlevels,asmeasuredduringthellingprogram,rangedfrom16feetbelowgroundsurfaceinholeBH-8to147feetinBH-6.Althoughverylittledataiscurrentlyavailablerela-tothegroundwater,itisassumedthatthegroundwaterinthenon-oer'mafroareasofthenorthbankisasubduedreplicaofthetopographythgroundwatergradientsbeingtowardstheSusitnaRiveranditsibutaries.Readingsoftheinstalledpiezometerswillbecontinuedintobetterevaluatethegroundwaterregime.limitedamountofdataiscurrentlyavailableregardingpermafrostitionattheWatanasite.thermalprobes,consistingof3/4inchgalvanizedsteelpipesfilledthdieselfuel,wereinstalledbytheCOE(18)inboreholesonbothsidestherivertomonitorgroundtemperatures.Readingsovera 5monthodusingthermistorsinseveralofthesepipesshowedpermafrostcondi-onthesouthbank.AllbutholeDH-21,whichwasdrilledbeneaththever,temperaturesbelowfreezingtothebottomofthehole.TheewasDH-28,drilledtoadepthof125feet.Minimumrangedaround-0.6°C.ngtheearlyphasesofthe1980program,anattemptwasmadetoreadinstruments,andtheresultsaresummarizedinFigures6.7and6.8.oftheprobesonthesouthbankwereblockedwithiceorshowedsub-temperaturesatdepthsof15to30feetbelowgroundsurface;anditsthereforeevidentthatpermafrostexistsinthesouthbankatrelativelylowdepths.Becauseoftheiceblockage,andtheshallowdepthofin-lationoftheprobes,itwasnotpossibletodeterminethedepthofthehni-tnmofthe permafrost.Temperatureswithinthisshallowzoneranged-0.01to-0.52°C.Noevidenceofpermafrostwasobservedfromprobesthenorthbank.However,itwasdeterminedthatgroundtemperaturesarein0.5°Cofthefreezingpointtoconsiderabledepths.drillinginBorrowAreaDbyboththeCOEandAcresindicatesthatiscontinuouspermafrostexiststhroughoutthe area.Visibleicewasdentifiedinseveralofthesoilsamplestodepthsof10feetormore.OnsouthabutmentBH-8(Acres,1980),whichhadremainedopenfromJuly,observedto"freezeback".ItwasfirstnotedinSeptemberduringtheicalloggingthattheholewas"neckeddown"atabout175feetandtemperatureatthatdepthwaslessthanO°C.TheholewasnextcheckednNovemberandfoundtobecompletelyfrozen.Inpreparationforinstal-ationofthe1980instrumentation,warmwaterwaspumpeddowntheholetotheice.Atthestartofthemeltingoperation,icewasencountered6-9portionoftheholes,andafewshearzones,suchasthoseencounteredinBH-2,tookhighquantitiesofwaterwithoutreturn.However,thesezonestendedtocave,andthereforecouldnotbeaccuratelytested.groundwaterregimeinthebedrockisconfinedtomovementalongfrac-andjointswithintherock.Waterlevels,asmeasuredduringthellingprogram,rangedfrom16feetbelowgroundsurfaceinholeBH-8to147feetinBH-6.Althoughverylittledataiscurrentlyavailablerela-tothegroundwater,itisassumedthatthegroundwaterinthenon-oer'mafroareasofthenorthbankisasubduedreplicaofthetopographythgroundwatergradientsbeingtowardstheSusitnaRiveranditsibutaries.Readingsoftheinstalledpiezometerswillbecontinuedintobetterevaluatethegroundwaterregime.limitedamountofdataiscurrentlyavailableregardingpermafrostitionattheWatanasite.thermalprobes,consistingof3/4inchgalvanizedsteelpipesfilledthdieselfuel,wereinstalledbytheCOE(18)inboreholesonbothsidestherivertomonitorgroundtemperatures.Readingsovera 5monthodusingthermistorsinseveralofthesepipesshowedpermafrostcondi-onthesouthbank.AllbutholeDH-21,whichwasdrilledbeneaththever,temperaturesbelowfreezingtothebottomofthehole.TheewasDH-28,drilledtoadepthof125feet.Minimumrangedaround-0.6°C.ngtheearlyphasesofthe1980program,anattemptwasmadetoreadinstruments,andtheresultsaresummarizedinFigures6.7and6.8.oftheprobesonthesouthbankwereblockedwithiceorshowedsub-temperaturesatdepthsof15to30feetbelowgroundsurface;anditsthereforeevidentthatpermafrostexistsinthesouthbankatrelativelylowdepths.Becauseoftheiceblockage,andtheshallowdepthofin-lationoftheprobes,itwasnotpossibletodeterminethedepthofthehni-tnmofthe permafrost.Temperatureswithinthisshallowzoneranged-0.01to-0.52°C.Noevidenceofpermafrostwasobservedfromprobesthenorthbank.However,itwasdeterminedthatgroundtemperaturesarein0.5°Cofthefreezingpointtoconsiderabledepths.drillinginBorrowAreaDbyboththeCOEandAcresindicatesthatiscontinuouspermafrostexiststhroughoutthe area.Visibleicewasdentifiedinseveralofthesoilsamplestodepthsof10feetormore.OnsouthabutmentBH-8(Acres,1980),whichhadremainedopenfromJuly,observedto"freezeback".ItwasfirstnotedinSeptemberduringtheicalloggingthattheholewas"neckeddown"atabout175feetandtemperatureatthatdepthwaslessthanO°C.TheholewasnextcheckednNovemberandfoundtobecompletelyfrozen.Inpreparationforinstal-ationofthe1980instrumentation,warmwaterwaspumpeddowntheholetotheice.Atthestartofthemeltingoperation,icewasencountered6-9 Thisborrowareawasidentifiedbytheearlierinvestigationsasaprimarysourceofimperviousandsemi-perviousmaterialforthedamconstruction.Theareaislocated1.5milesupstreamofthedamonthenorthbank(Figures6.1and6.9).Fouradditionalaugerhoandtwoadditionalseismiclinesperformedduringthe1980programgenerallyconfirmtheearlierfindings.Overburdenthroughouttheareaisverythick,rangingfrom150tomuchas350feetthick(14,20).Thematerialinthisareaiscom-posedofasurfacelayerofnaturalorganicgroundcover,thentwothreefeetofbouldersandorganicsiltsunderlainbyglacialtillscomposedofdensegravellysiltysands.Thetillsrangefrom15tofeetthickandusuallyoverlieaclaytosandygravellyclay.6-10(i)RockfillMaterialThe1980investigationprogramwasplannedtoconfirmthematerialpreviouslyidentifiedbytheCOEandtoprovideadditionalinformationtotheirgeotechnicalproperties,thicknessandarealextent.Primaryemphasiswasplacedondefiningthecoreandfiltermaterialsourcesandverifyingthequantitiesofrockfillpreviouslyidentifiednearthedamsite.Explorationsincludedgeologicmapping,augerdrilling,seismicrefractionsurveys,andlaboratorytesting.ThelocationmapforallexplorationsisshowninFigure6.1.TheboringlogsareincludedinAppendixC-1,thelaboratorytestprograminAppendixC-2,andtheseirefractionstudyinAppendixD.atadepthof50feet.Meltingproceededtoadepthof170feetwhereholewasblockedbycaving.TwoquarriespreviouslydesignatedQuarryAandQuarryBbytheCOE(Figures6.1and6.9)wereinvestigated.AdditionalsurficialwasperformedinQuarryAonthesouthbankandindicatedtherockisprimarilyandesiteoverlyingdiorite.Thisdiffersfrominterpretationoftheearlierexploration.Additionaldiamondcoredrillinganddetailedmappingwillberequiredtoconfirmthethinessandextentofthevariousrockunits.QuarryBwasinvestibyadditionalsurficialmappingandaseismiclineacrossthesectionofthearea(Figure6.1).Thedatacollectedindicatesoverburdeninthisareamayreachasmuchas300feetthickwhichwouldprecludeexploitationoftheexposedrockfaceasaquarry.(ii)CoreMaterial-BorrowArea0AthermistorstringwasinstalledinBH-6onthenorthbanktoadepth250feet.However,temperatureshavenotyetstabilizedinthehole.istobenotedthatthisholeremainedopenandunfrozenfromthetimeitscompletioninJulyuntilinstrumentationwasinstalledinNovember.Therefore,theholedoesnotappeartopenetrateapermafrostzone.(e)BorrowAreasThisborrowareawasidentifiedbytheearlierinvestigationsasaprimarysourceofimperviousandsemi-perviousmaterialforthedamconstruction.Theareaislocated1.5milesupstreamofthedamonthenorthbank(Figures6.1and6.9).Fouradditionalaugerhoandtwoadditionalseismiclinesperformedduringthe1980programgenerallyconfirmtheearlierfindings.Overburdenthroughouttheareaisverythick,rangingfrom150tomuchas350feetthick(14,20).Thematerialinthisareaiscom-posedofasurfacelayerofnaturalorganicgroundcover,thentwothreefeetofbouldersandorganicsiltsunderlainbyglacialtillscomposedofdensegravellysiltysands.Thetillsrangefrom15tofeetthickandusuallyoverlieaclaytosandygravellyclay.6-10(i)RockfillMaterialThe1980investigationprogramwasplannedtoconfirmthematerialpreviouslyidentifiedbytheCOEandtoprovideadditionalinformationtotheirgeotechnicalproperties,thicknessandarealextent.Primaryemphasiswasplacedondefiningthecoreandfiltermaterialsourcesandverifyingthequantitiesofrockfillpreviouslyidentifiednearthedamsite.Explorationsincludedgeologicmapping,augerdrilling,seismicrefractionsurveys,andlaboratorytesting.ThelocationmapforallexplorationsisshowninFigure6.1.TheboringlogsareincludedinAppendixC-1,thelaboratorytestprograminAppendixC-2,andtheseirefractionstudyinAppendixD.atadepthof50feet.Meltingproceededtoadepthof170feetwhereholewasblockedbycaving.TwoquarriespreviouslydesignatedQuarryAandQuarryBbytheCOE(Figures6.1and6.9)wereinvestigated.AdditionalsurficialwasperformedinQuarryAonthesouthbankandindicatedtherockisprimarilyandesiteoverlyingdiorite.Thisdiffersfrominterpretationoftheearlierexploration.Additionaldiamondcoredrillinganddetailedmappingwillberequiredtoconfirmthethinessandextentofthevariousrockunits.QuarryBwasinvestibyadditionalsurficialmappingandaseismiclineacrossthesectionofthearea(Figure6.1).Thedatacollectedindicatesoverburdeninthisareamayreachasmuchas300feetthickwhichwouldprecludeexploitationoftheexposedrockfaceasaquarry.(ii)CoreMaterial-BorrowArea0AthermistorstringwasinstalledinBH-6onthenorthbanktoadepth250feet.However,temperatureshavenotyetstabilizedinthehole.istobenotedthatthisholeremainedopenandunfrozenfromthetimeitscompletioninJulyuntilinstrumentationwasinstalledinNovember.Therefore,theholedoesnotappeartopenetrateapermafrostzone.(e)BorrowAreas Grainsizedistributioncurvesofthetillsamplestestedinthisinvestigation(AppendixC-2)andtheCOEprogram(18)showthatthematerialiswellgraded,consistingprimarilyofsiltysandwithsomegravelandatraceofclay.Thematerialisgenerallydensetoverydensein-situ,andhasanaturalmoisturecontentrangingfrom6.6to25.7percentwithanaverageof11percent.Moisturecontentwasfoundtobevariablebetweensamplesfromthesamehole,aswellasfromholetohole.Thefinerfractionofthematerialisgenerallynon-plastictoverylowplasticity(PIranges2to12).Theshapeofthecompactioncurvesindicatesthatmoisturecontentwillbecriticalinobtainingmaximumdensityandstrengthduringconstruction,andthattheshearstrengthofthematerialdropsoffrapidlywithincreasesofwatercontentovertheoptimumwatercontent.iii)FilterMaterial-BorrowAreaEThisborrowareawasidentifiedasthemainsourceoffilterandcon-creteaggregatematerialbytheCOE(18).BorrowAreaEisanallu-vialdepositformedatthemouthofTsusenaCreekontherightbankoftheSusitnaRiver,approximatelyfourmilesdownstreamofthedamsite(Figures6.1and6.9).Nineaugerholesrangingfrom5to31feetdeepweredrilledinthisareatoexpandthepreviouswork(AppendixC-l).Aswell,additionalseismicrefractionlines(18)wereruntoconfirmthethicknessofthealluvialmaterialandthelimitsoftheproposedBorrowarea.Theaugerdrillingindicatedathinorganicandsiltlayervaryingfrom0.5to2.0feetthickovermostofthearea.Thislayerisunderlainby0.5to3.0feetofsiltysandtocleansand,belowwhichisa 6footthicklayerofsandygravel.Thesandyandgravellymaterialsarewellroundedparticlesupto4inchesindiameterandarecleanandwellgraded.Thesizeoftheparticlesappearstoincreasebelow10feet,withvariablecobbleandbouldercontentthathinderedthedrilling.Thewatertableinthisareaisnearthebaseofthesandygravellayerfrom7to16.5feetbelowthegroundsurface.Twoholes(AH-E8andAH-E9)weredrilledonasandbarfurtherup-streamonTsusenaCreek(Figure6.1)inanattempttoexpandthelimitsofBorrowAreaEandconfirmtheavailabilityofadditionalquantitiesofmaterial.Bothholeswereterminatedatlessthan10feetdeepduetoahighconcentrationofboulders.However,theover-burdenprofilescomparefavorablywiththeworkfromthemainsectionoftheborrowarea.The1980seismicline(SL-9)inthenorthwestportionoftheareaconfirmsthatthealluvialmaterialsvaryinthicknessfrom30feettoasmuchas200feetlocally,withanaveragethicknessof30to50feet.Grainsizedistributioncurves(AppendixC-2)ofthesplitspoonsamplesshowthattheupperfewfeetofmaterialconsistsofsandysiltgradingdownwardstosiltysand.Thislayerisgenerallypoorlygradedandrelativelyfinegrainedwith30to60percentpassingtheNo.200sieve.6-11Grainsizedistributioncurvesofthetillsamplestestedinthisinvestigation(AppendixC-2)andtheCOEprogram(18)showthatthematerialiswellgraded,consistingprimarilyofsiltysandwithsomegravelandatraceofclay.Thematerialisgenerallydensetoverydensein-situ,andhasanaturalmoisturecontentrangingfrom6.6to25.7percentwithanaverageof11percent.Moisturecontentwasfoundtobevariablebetweensamplesfromthesamehole,aswellasfromholetohole.Thefinerfractionofthematerialisgenerallynon-plastictoverylowplasticity(PIranges2to12).Theshapeofthecompactioncurvesindicatesthatmoisturecontentwillbecriticalinobtainingmaximumdensityandstrengthduringconstruction,andthattheshearstrengthofthematerialdropsoffrapidlywithincreasesofwatercontentovertheoptimumwatercontent.iii)FilterMaterial-BorrowAreaEThisborrowareawasidentifiedasthemainsourceoffilterandcon-creteaggregatematerialbytheCOE(18).BorrowAreaEisanallu-vialdepositformedatthemouthofTsusenaCreekontherightbankoftheSusitnaRiver,approximatelyfourmilesdownstreamofthedamsite(Figures6.1and6.9).Nineaugerholesrangingfrom5to31feetdeepweredrilledinthisareatoexpandthepreviouswork(AppendixC-l).Aswell,additionalseismicrefractionlines(18)wereruntoconfirmthethicknessofthealluvialmaterialandthelimitsoftheproposedBorrowarea.Theaugerdrillingindicatedathinorganicandsiltlayervaryingfrom0.5to2.0feetthickovermostofthearea.Thislayerisunderlainby0.5to3.0feetofsiltysandtocleansand,belowwhichisa 6footthicklayerofsandygravel.Thesandyandgravellymaterialsarewellroundedparticlesupto4inchesindiameterandarecleanandwellgraded.Thesizeoftheparticlesappearstoincreasebelow10feet,withvariablecobbleandbouldercontentthathinderedthedrilling.Thewatertableinthisareaisnearthebaseofthesandygravellayerfrom7to16.5feetbelowthegroundsurface.Twoholes(AH-E8andAH-E9)weredrilledonasandbarfurtherup-streamonTsusenaCreek(Figure6.1)inanattempttoexpandthelimitsofBorrowAreaEandconfirmtheavailabilityofadditionalquantitiesofmaterial.Bothholeswereterminatedatlessthan10feetdeepduetoahighconcentrationofboulders.However,theover-burdenprofilescomparefavorablywiththeworkfromthemainsectionoftheborrowarea.The1980seismicline(SL-9)inthenorthwestportionoftheareaconfirmsthatthealluvialmaterialsvaryinthicknessfrom30feettoasmuchas200feetlocally,withanaveragethicknessof30to50feet.Grainsizedistributioncurves(AppendixC-2)ofthesplitspoonsamplesshowthattheupperfewfeetofmaterialconsistsofsandysiltgradingdownwardstosiltysand.Thislayerisgenerallypoorlygradedandrelativelyfinegrainedwith30to60percentpassingtheNo.200sieve.6-11 Theunderlyingmaterialisclassifiedassandygraveltogravelly~withtracesofsilt.Thegrainsizedistributionsforthislayer~verygoodcorrelationwiththeresultsobtainedbytheCaEforBor~AreaE.Naturalmoisturecontentforthesandysiltlayerranges~15.7to27.3percent.Thegravellysandlayerbycomparisonhasnaturalmoisturecontentsrangingfrom4.4to9.8percent(allsam~weretakenfromabovethewatertable).AllthenewdataisconsistentwiththeearlierdatagatheredbytnCaE.Basedontheadditionalholesandseismiclinestheborrowa~couldbeexpandedupstreamalongTsusenaCreek,withadequatequanttiesapparentlybeingreadilyavailable.Furthertestingwillbeperformedin1981toconfirmthematerialpropertiesforuseasconcreteaggregate.(iv)OtherPotentialMaterialSourcesDuringthecourseofthecurrentandpreviousinvestigationswithinthedamsitearea,severalpotentialsourcesofmaterials,otherththosediscussedabove,wereidentified(Figure6.9).However,conserableadditionalinvestigationwillberequiredtoevaluatethet~suitabilityandquantitiesofmaterialsavailablefromtheseareas.Thevarioussourceareasarediscussedbelowintermsofthetypesmaterialswhichmightbeobtainedfromthem.-SourcesofRockfillMaterialConsiderablerockexcavationwillberequiredduringconstructionforthedamfoundation,diversionfacilities,undergroundpower-house,penstocksandspillway.Dependingonthequalityofthematerialandtheconstructionschedule,someofitmaybeusefulfill.-SourcesofCoreMaterialBasedonreconnaissancemappingandexploration,threeareaswereidentifiedaspotentialsourcesofcorematerial.Severalbagsampleswerecollectedtoaidinthepreliminarydefinitionofthmaterialsavailableineacharea.Thefirstarea,designatedBorrowAreaH,islocatedsouthwestofFogLakes(Figure6.9)andisapproximatelyfivetosevenmilesfthedamsite.Thetopographyofthisareaisgenerallyflattogentlyrolling.Mostofthesurfaceiscoveredbyshallowswampsandmarshesindicatingpoordrainageandrelativelyimperviousunderlyingmaterials.SlumpexposuresalongFogCreekandtheSusitnaRiverindicatetheareaisunderlainbyarelativelythiclayerofsilt,sandandgravelwithsomecobblesandatraceofclay.Alargeicewedgewasobservedinaslumpexposureonthewestendofthesite,indicatingthatthetillisfrozenlocally.Grabsamplesweretaken,andgradationcurvesarepresented.(AppendixC-2).6-12Theunderlyingmaterialisclassifiedassandygraveltogravelly~withtracesofsilt.Thegrainsizedistributionsforthislayer~verygoodcorrelationwiththeresultsobtainedbytheCaEforBor~AreaE.Naturalmoisturecontentforthesandysiltlayerranges~15.7to27.3percent.Thegravellysandlayerbycomparisonhasnaturalmoisturecontentsrangingfrom4.4to9.8percent(allsam~weretakenfromabovethewatertable).AllthenewdataisconsistentwiththeearlierdatagatheredbytnCaE.Basedontheadditionalholesandseismiclinestheborrowa~couldbeexpandedupstreamalongTsusenaCreek,withadequatequanttiesapparentlybeingreadilyavailable.Furthertestingwillbeperformedin1981toconfirmthematerialpropertiesforuseasconcreteaggregate.(iv)OtherPotentialMaterialSourcesDuringthecourseofthecurrentandpreviousinvestigationswithinthedamsitearea,severalpotentialsourcesofmaterials,otherththosediscussedabove,wereidentified(Figure6.9).However,conserableadditionalinvestigationwillberequiredtoevaluatethet~suitabilityandquantitiesofmaterialsavailablefromtheseareas.Thevarioussourceareasarediscussedbelowintermsofthetypesmaterialswhichmightbeobtainedfromthem.-SourcesofRockfillMaterialConsiderablerockexcavationwillberequiredduringconstructionforthedamfoundation,diversionfacilities,undergroundpower-house,penstocksandspillway.Dependingonthequalityofthematerialandtheconstructionschedule,someofitmaybeusefulfill.-SourcesofCoreMaterialBasedonreconnaissancemappingandexploration,threeareaswereidentifiedaspotentialsourcesofcorematerial.Severalbagsampleswerecollectedtoaidinthepreliminarydefinitionofthmaterialsavailableineacharea.Thefirstarea,designatedBorrowAreaH,islocatedsouthwestofFogLakes(Figure6.9)andisapproximatelyfivetosevenmilesfthedamsite.Thetopographyofthisareaisgenerallyflattogentlyrolling.Mostofthesurfaceiscoveredbyshallowswampsandmarshesindicatingpoordrainageandrelativelyimperviousunderlyingmaterials.SlumpexposuresalongFogCreekandtheSusitnaRiverindicatetheareaisunderlainbyarelativelythiclayerofsilt,sandandgravelwithsomecobblesandatraceofclay.Alargeicewedgewasobservedinaslumpexposureonthewestendofthesite,indicatingthatthetillisfrozenlocally.Grabsamplesweretaken,andgradationcurvesarepresented.(AppendixC-2).6-12 ThesecondareaislocatedtotheeastofBorrowAreaDonDeadmanCreek,onetotwomilesupstreamfromtheconfluencewiththeSusitnaRiverandapproximatelythreemilesfromthedamsite.BasedoncliffandslumpexposuresalongDeadmanCreekandthemor-phologyofthesite,threetypesofmaterialswereidentifiedinthisarea.Thesematerialsareglacialoutwash,ablationtillandlodgementtill.Theoutwashconsistsofarelativelyclean,mediumtocoarsegrainedsandwithsomegravel,cobblesandboulders.Theablationtilliscomposedprimarilyofsiltandsandwithminoramountsofgravel,cobblesandclay,whilethelodgementtillisasandy,clayeysiltwithsomegravelandcobbles,generallyverycompact.Thetopographyofthisareaisgenerallyflattogentlyrollingwithseveraloldchannelssuperimposedonthesurface.Theseoldchan-nelsareindicativeoffluvialprocessesanditisthereforeassumedthatmuchofthissiteisblanketedwithalayerofoutwashmaterialofvariablethicknessoverlyingaseriesoftills.ThethirdareaislocatedonthewestedgeofBorrowAreaD.Areviewofthepreviousdatasuggeststhatthepercentageoftillsandclay-richmaterialincreasestothewest.Furtherinvestigationwouldberequiredtoverifythis,shouldadditionalfinegrainedmaterialsourcesberequired.-SourcesofFilterMaterialIntheupperreachesofTsusenaCreek,theCOEdelineatedtwoareasdesignatedBorrowAreaCandBorrowAreaF(Figure6.9)whichmaybesuitablesourcesoffiltermaterial.Todateonlyalimitedamountofinvestigation,consistingoftestpitsinareaFandthreeseis-miclinesinareaC,hasbeenperformed(Figure6.1).Additionalinvestigationsandtestingwillberequiredtoverifythetypeandquantitiesofmaterialsineacharea.Basedonsurficialmappingandgeneralreconnaissanceinthevi-cinityofthedamsite,itwouldappearthattheareasurroundingtheconfluenceofClarkCreekandTsusenaCreek,approximatelyfivetosixmilesnorthofthedamsite(Figure6.8),mayprovideapotentialsourceoffiltermaterial.Thisareaappearstobecomposedprimarilyofalluvialmaterialsandreworkedglacialoutwash.Onesampleofmaterialwasalsocollectedfromagravelbarexposedintheriverchannelslightlyupstreamofthedam.Thegrainsizedistributioncurveshowsthatthissampleisagravelinasandmatrixwithafewcobblesandfewfines.LogsofDH-1throughDH-5indicatesimilarmaterialatdepth.Furtherinvestigationofthismaterialforfilter,transition,aggregateorshellmaterialiswarranted,andwillbeconductedaspartofthe1981investigation.6-13ThesecondareaislocatedtotheeastofBorrowAreaDonDeadmanCreek,onetotwomilesupstreamfromtheconfluencewiththeSusitnaRiverandapproximatelythreemilesfromthedamsite.BasedoncliffandslumpexposuresalongDeadmanCreekandthemor-phologyofthesite,threetypesofmaterialswereidentifiedinthisarea.Thesematerialsareglacialoutwash,ablationtillandlodgementtill.Theoutwashconsistsofarelativelyclean,mediumtocoarsegrainedsandwithsomegravel,cobblesandboulders.Theablationtilliscomposedprimarilyofsiltandsandwithminoramountsofgravel,cobblesandclay,whilethelodgementtillisasandy,clayeysiltwithsomegravelandcobbles,generallyverycompact.Thetopographyofthisareaisgenerallyflattogentlyrollingwithseveraloldchannelssuperimposedonthesurface.Theseoldchan-nelsareindicativeoffluvialprocessesanditisthereforeassumedthatmuchofthissiteisblanketedwithalayerofoutwashmaterialofvariablethicknessoverlyingaseriesoftills.ThethirdareaislocatedonthewestedgeofBorrowAreaD.Areviewofthepreviousdatasuggeststhatthepercentageoftillsandclay-richmaterialincreasestothewest.Furtherinvestigationwouldberequiredtoverifythis,shouldadditionalfinegrainedmaterialsourcesberequired.-SourcesofFilterMaterialIntheupperreachesofTsusenaCreek,theCOEdelineatedtwoareasdesignatedBorrowAreaCandBorrowAreaF(Figure6.9)whichmaybesuitablesourcesoffiltermaterial.Todateonlyalimitedamountofinvestigation,consistingoftestpitsinareaFandthreeseis-miclinesinareaC,hasbeenperformed(Figure6.1).Additionalinvestigationsandtestingwillberequiredtoverifythetypeandquantitiesofmaterialsineacharea.Basedonsurficialmappingandgeneralreconnaissanceinthevi-cinityofthedamsite,itwouldappearthattheareasurroundingtheconfluenceofClarkCreekandTsusenaCreek,approximatelyfivetosixmilesnorthofthedamsite(Figure6.8),mayprovideapotentialsourceoffiltermaterial.Thisareaappearstobecomposedprimarilyofalluvialmaterialsandreworkedglacialoutwash.Onesampleofmaterialwasalsocollectedfromagravelbarexposedintheriverchannelslightlyupstreamofthedam.Thegrainsizedistributioncurveshowsthatthissampleisagravelinasandmatrixwithafewcobblesandfewfines.LogsofDH-1throughDH-5indicatesimilarmaterialatdepth.Furtherinvestigationofthismaterialforfilter,transition,aggregateorshellmaterialiswarranted,andwillbeconductedaspartofthe1981investigation.6-13 Generally,thelowersectionoftheWatanaReservoirandadjacentslopesarepredominantlycoveredbyaveneerofglacialtillwithscatteredoutwashdeposits.Twomaintypesoftillhavebeenifiedinthearea;ablationandbasaltills.Thebasaltillisconsolidated,hasafinegrainedmatrix(moresiltandclay)andlowpermeability.Theablationtillhaslessfinesandasomewhathigherpermeability.Outwashdepositsconsistofcobbles,gravels,andsandsthatexhibitacrudestratificationandarefreedrainingOnthesouthsideoftheSusitnaRiver,theFogLakeareaisteristicofaflutedgroundmorainesurface.UpstreamintheCreekarea,glaciolacustrinematerialformsabroad,flatplainwhmantlestheunderlyingglacialtillandthesemi-consolidatedTertisediments.Thismaterialconsistspredominantlyofstratified,graded,finegrainedsandsandsiltswithlesseramountsofclay.Significantalluvialdepositsexistintherivervalleyandconsistreworkedoutwashandalluvium.GlaciationoftheareawasaccompanbythefillinginoftheSusitnaRivervalley.Subsequentmodifictionbyalluvialprocessesduringdeglaciationresultedinthetionoffloodplainterraces.Icedisintegrationfeaturessuchaskamesandeskershavebeenobservedintherivervalley.6-14Permafrostexistsinthearea,asevidencedbyactiveicewedges,polygons,stonenetsandslumpingoftheglacialtilloverlyingfrost.NumerousslumpshavebeenidentifiedintheWatanaarea,especiallyinsedimentscomprisedofbasaltill,andinsomeinstancestheTertiarysediments.ThemajorityoftheslumpsoccurfrozenglacialtillsintheWatanaCreekareaandonanunnamedbetweenOeadmanandWatanaCreek.Inaddition,numerousareasoffrozenalluviumandinterstitialicecrystalshavebeenobservedinoutcropsanddrillholedrivesamples.PreliminaryreconnaissancemappingoftheWatanaReservoirwasperformedforthe1980fieldprogram.Principalrocktypesandgeneraltypesofficialmaterialwereidentified.ThetopographyoftheWatanaReservoirand-adjacentslopesisbyanarrowV-shapedstream-cutvalleysuperimposedonabroadU-shapedglacialvalley.Surficialdepositsmaskmuchofthebedrockintheespeciallyintheloweranduppermostreachesofthereservoir.Asurficialgeologymapofthereservoir,preparedbytheCOE.distinguishestilacustrineandalluvialdeposits,aswellasgeneralrocktypes(18).(i)SurficialOeposits(ii)BedrockGeologyAspreviouslydiscussed,theWatanadamsiteisunderlainbyadioripluton.ApproximatelythreemilesupstreamoftheWatanadamsite,non-conformablecontactbetweenargilliteandthedioriticpluton(f)ReservoirGeologyGenerally,thelowersectionoftheWatanaReservoirandadjacentslopesarepredominantlycoveredbyaveneerofglacialtillwithscatteredoutwashdeposits.Twomaintypesoftillhavebeenifiedinthearea;ablationandbasaltills.Thebasaltillisconsolidated,hasafinegrainedmatrix(moresiltandclay)andlowpermeability.Theablationtillhaslessfinesandasomewhathigherpermeability.Outwashdepositsconsistofcobbles,gravels,andsandsthatexhibitacrudestratificationandarefreedrainingOnthesouthsideoftheSusitnaRiver,theFogLakeareaisteristicofaflutedgroundmorainesurface.UpstreamintheCreekarea,glaciolacustrinematerialformsabroad,flatplainwhmantlestheunderlyingglacialtillandthesemi-consolidatedTertisediments.Thismaterialconsistspredominantlyofstratified,graded,finegrainedsandsandsiltswithlesseramountsofclay.Significantalluvialdepositsexistintherivervalleyandconsistreworkedoutwashandalluvium.GlaciationoftheareawasaccompanbythefillinginoftheSusitnaRivervalley.Subsequentmodifictionbyalluvialprocessesduringdeglaciationresultedinthetionoffloodplainterraces.Icedisintegrationfeaturessuchaskamesandeskershavebeenobservedintherivervalley.6-14Permafrostexistsinthearea,asevidencedbyactiveicewedges,polygons,stonenetsandslumpingoftheglacialtilloverlyingfrost.NumerousslumpshavebeenidentifiedintheWatanaarea,especiallyinsedimentscomprisedofbasaltill,andinsomeinstancestheTertiarysediments.ThemajorityoftheslumpsoccurfrozenglacialtillsintheWatanaCreekareaandonanunnamedbetweenOeadmanandWatanaCreek.Inaddition,numerousareasoffrozenalluviumandinterstitialicecrystalshavebeenobservedinoutcropsanddrillholedrivesamples.PreliminaryreconnaissancemappingoftheWatanaReservoirwasperformedforthe1980fieldprogram.Principalrocktypesandgeneraltypesofficialmaterialwereidentified.ThetopographyoftheWatanaReservoirand-adjacentslopesisbyanarrowV-shapedstream-cutvalleysuperimposedonabroadU-shapedglacialvalley.Surficialdepositsmaskmuchofthebedrockintheespeciallyintheloweranduppermostreachesofthereservoir.Asurficialgeologymapofthereservoir,preparedbytheCOE.distinguishestilacustrineandalluvialdeposits,aswellasgeneralrocktypes(18).(i)SurficialOeposits(ii)BedrockGeologyAspreviouslydiscussed,theWatanadamsiteisunderlainbyadioripluton.ApproximatelythreemilesupstreamoftheWatanadamsite,non-conformablecontactbetweenargilliteandthedioriticpluton(f)ReservoirGeology crossestheSusitnaRiver.AnapproximatelocationofthiscontacthasalsobeendelineatedonFogCreek,4milestothesouthofthedamsite.JustdownstreamoftheconfluenceofWatanaCreekandtheSusitnaRiver,thebedrockconsistsofsemi-consolidated,Tertiary,sedimentaryrocks(15)andvolcanicsofTriassicage(Figure4.1).TheseTriassicvolcanicsconsistofmetabasaltflowswithminorthininterbedsofmetachert,argillite,metavolcaniclasticrocksandmarble(5).FromjustupstreamofWatanaCreektoJayCreek,therockunitconsistsofametavolcanogenicsequencedominantlycomposedofmeta-morphosedflowsandtuffsofbasaltictoandesiticcomposition.FromJayCreektojustdownstreamoftheOshetnaRiver,thereservoirisunderlainbyametamorphicterrainofamphiboliteandminoramountsofgreenchistandfoliateddiorite.TotheeastoftheOshetnaRiver,glacialdepositspredominate.ThemainstructuralfeatureoftheWatanaReservoirisathrustwhichtrendsnortheast-southwestandisknownastheTalkeetnaThrust(4).ThisthrustfaultcrossestheSusitnaRiverapproximatelyeightmilesupstreamoftheWatanadamsite.ThedipofthisfaultisuncertainasCsejteyandothers(4)haveinterpretedittohaveasoutheastdip,whileTurnerandSmith(16,17)suggestanorthwestdip.Todate,noevidencehasbeenfoundforrecentdisplacementalongthisfault.Atthesouthwestendofthefault,unfaultedTertiaryvolcanicsoverliethefault(4).EvidenceofpossiblefaultinghasbeenobservedinthesedimentaryandvolcanicrockofJurassicage,northofWatanaCreek(4,17).InvestigationsoftheTertiarysedimentsinWatanaCreekbymembersoftheUniversityofAlaskaGeologyDepartmentdidnot,however,uncoveranydirectevidenceoffaulting.Additionalworkonthereservoirgeologyisplannedforthe1981program.6-15crossestheSusitnaRiver.AnapproximatelocationofthiscontacthasalsobeendelineatedonFogCreek,4milestothesouthofthedamsite.JustdownstreamoftheconfluenceofWatanaCreekandtheSusitnaRiver,thebedrockconsistsofsemi-consolidated,Tertiary,sedimentaryrocks(15)andvolcanicsofTriassicage(Figure4.1).TheseTriassicvolcanicsconsistofmetabasaltflowswithminorthininterbedsofmetachert,argillite,metavolcaniclasticrocksandmarble(5).FromjustupstreamofWatanaCreektoJayCreek,therockunitconsistsofametavolcanogenicsequencedominantlycomposedofmeta-morphosedflowsandtuffsofbasaltictoandesiticcomposition.FromJayCreektojustdownstreamoftheOshetnaRiver,thereservoirisunderlainbyametamorphicterrainofamphiboliteandminoramountsofgreenchistandfoliateddiorite.TotheeastoftheOshetnaRiver,glacialdepositspredominate.ThemainstructuralfeatureoftheWatanaReservoirisathrustwhichtrendsnortheast-southwestandisknownastheTalkeetnaThrust(4).ThisthrustfaultcrossestheSusitnaRiverapproximatelyeightmilesupstreamoftheWatanadamsite.ThedipofthisfaultisuncertainasCsejteyandothers(4)haveinterpretedittohaveasoutheastdip,whileTurnerandSmith(16,17)suggestanorthwestdip.Todate,noevidencehasbeenfoundforrecentdisplacementalongthisfault.Atthesouthwestendofthefault,unfaultedTertiaryvolcanicsoverliethefault(4).EvidenceofpossiblefaultinghasbeenobservedinthesedimentaryandvolcanicrockofJurassicage,northofWatanaCreek(4,17).InvestigationsoftheTertiarysedimentsinWatanaCreekbymembersoftheUniversityofAlaskaGeologyDepartmentdidnot,however,uncoveranydirectevidenceoffaulting.Additionalworkonthereservoirgeologyisplannedforthe1981program.6-15 ThebedrockatDevilCanyoniswellexposedalongthecanyoninscatteredoutcropsthroughoutthearea(Figure6.12).Bec[ro"ksistsprimarilyofaCretaceousargilliteinterbeddedwith(Figure4.1)whichhasbeenmetamorphosedandintrudedbymaficdikes.Theargilliteismediumtodarkgray,hardandsliweathered.Themajorconstituentsarequartzandbiotitewithpyriteandorganicmaterial(19).Theargilliteisverythinlywithgrainsizegenerallyveryfinebutranginguptomediumdependingontheproportionofsand-sizeparticles.Whereore,ensandgrainsarealignedparalleltothefoliation.Thetexturevariesfrommassiveandnon-foliatedtoawellfoliation.Wherepresent,thefoliationrangesfromslatyphylliticandrarelyschistose.Thetextureappearstobeontherelationofbeddingtofoldaxes(seeBedrockStructure).InterbeddedwiththeargillitearethinbedsoflightgrayThisischaracteristicofturbiditydepositswhichistheioriginofthisunit(5).Thisrockconsistsoffineandmediumgrainswhicharegenerallygradedwithinthebeds.Themajortuentsofthegraywackearefeldspar,quartzandbiotitewithmiironoxides,pyriteandorganicmaterial(19).Thecontactstheargilliteandgraywackebedsaresharpandtight.6-16DevilCanyonhassteepwallswhicharegenerallycoveredbyathinofoverburden.Theoverburdenvariesfromafewinchestoseveralthickness.Theoverburdenconsistsprimarilyoftalusonoratthethesteeptoverticalvalleywalls.Ontheflatuplandareasabove1feet,theslopesarecoveredbyglacialtillthatvariesfrom5to35thick.AnoverburdenisopachmapconstructedfromseismicsurveyandboringdataisshownonFigure6.11.Ontheleftbankoftheriver(south),thereisatopographicdepressionparallelingtheelongatedinthisregion.Theoverburdeninthisareareachesadepthofmore85feetandconsistsprincipallyofglacialmaterial.Aterraceorbardepositislocatedapproximately900feetupstreamoftheprc)posedaxisattheconfluenceoftheSusitnaRiverandCheechako.thicknessofalluvialmaterialapproaches350feet(Figure6.11).burdenalongthispointbarthickensrapidlyfrom100feettomorefeetoveradistanceoflessthan400feet.Thissteepdropoffinwasidentifiedinpreviousstudiesandrequiresfurtherinvestigation6.2-DevilCanyonThissectiondiscussesthegeologyandgeotechnicalconditionsoftheDevilCanyonsiteasinvestigatedduringthe1980programandby~arlierinvestigators.(a)OverburdenConditions(b)BedrockGeology(i)LithologyThebedrockatDevilCanyoniswellexposedalongthecanyoninscatteredoutcropsthroughoutthearea(Figure6.12).Bec[ro"ksistsprimarilyofaCretaceousargilliteinterbeddedwith(Figure4.1)whichhasbeenmetamorphosedandintrudedbymaficdikes.Theargilliteismediumtodarkgray,hardandsliweathered.Themajorconstituentsarequartzandbiotitewithpyriteandorganicmaterial(19).Theargilliteisverythinlywithgrainsizegenerallyveryfinebutranginguptomediumdependingontheproportionofsand-sizeparticles.Whereore,ensandgrainsarealignedparalleltothefoliation.Thetexturevariesfrommassiveandnon-foliatedtoawellfoliation.Wherepresent,thefoliationrangesfromslatyphylliticandrarelyschistose.Thetextureappearstobeontherelationofbeddingtofoldaxes(seeBedrockStructure).InterbeddedwiththeargillitearethinbedsoflightgrayThisischaracteristicofturbiditydepositswhichistheioriginofthisunit(5).Thisrockconsistsoffineandmediumgrainswhicharegenerallygradedwithinthebeds.Themajortuentsofthegraywackearefeldspar,quartzandbiotitewithmiironoxides,pyriteandorganicmaterial(19).Thecontactstheargilliteandgraywackebedsaresharpandtight.6-16DevilCanyonhassteepwallswhicharegenerallycoveredbyathinofoverburden.Theoverburdenvariesfromafewinchestoseveralthickness.Theoverburdenconsistsprimarilyoftalusonoratthethesteeptoverticalvalleywalls.Ontheflatuplandareasabove1feet,theslopesarecoveredbyglacialtillthatvariesfrom5to35thick.AnoverburdenisopachmapconstructedfromseismicsurveyandboringdataisshownonFigure6.11.Ontheleftbankoftheriver(south),thereisatopographicdepressionparallelingtheelongatedinthisregion.Theoverburdeninthisareareachesadepthofmore85feetandconsistsprincipallyofglacialmaterial.Aterraceorbardepositislocatedapproximately900feetupstreamoftheprc)posedaxisattheconfluenceoftheSusitnaRiverandCheechako.thicknessofalluvialmaterialapproaches350feet(Figure6.11).burdenalongthispointbarthickensrapidlyfrom100feettomorefeetoveradistanceoflessthan400feet.Thissteepdropoffinwasidentifiedinpreviousstudiesandrequiresfurtherinvestigation6.2-DevilCanyonThissectiondiscussesthegeologyandgeotechnicalconditionsoftheDevilCanyonsiteasinvestigatedduringthe1980programandby~arlierinvestigators.(a)OverburdenConditions(b)BedrockGeology(i)Lithology Approximately3,500feetsoutheastofthedamsite,theargilliteunitisincontactwithgranodiorite/quartzdiorite(Figure4.1).Therockismediumgrainedandconsistsofquartz,plagioclasefeldsparandbiotite.Thecontactbetweenthegranodiorite/dioriteandtheargil-liteisirregularwiththegranodiorite/dioriteintrudingtheargil-lite.Theextentoftheintrusionbeneaththesitehasnotbeendetermined,althoughdioritewasencounteredinBH-2(Figure6.13).Dikesandveinshaveintrudedallrocksinthesitearea.Theargil-litecontainsnumerousfoldedandfaultedquartzveinsandhasbeenintrudedbybothfelsicandmaficdikes.Thegranodiorite/dioriteappearstohavebeenintrudedonlybymaficdikes.Thefelsicdikesarelightyellowish-graytograyandconsistofaplite,rhyoliteandotherunidentifiedsilicicvarieties.Thetexturesvaryfromaphani-tictofinegrained.Maficdikesarefinegrained,darkgray,andappeartobedioritetobasalt(diabase)incomposition.Dikesrangefromlessthan1inchto60feetwide,butaregenerallyabout20feetwide.Dikesstrikefromnorthwesttonorthwithsteeptoverticaldips.Theygenerallyformgullies,andoccasionallyridgeswhereexposedinthecanyonwalls.Thereappearstobenocorrelationbetweenlithologyandmorphologicexpression.Dikeswhichformgulliestendtobeveryclosetocloselyfractured.Someareshearedatthecontactwiththesurroundingrock.NumerousdikeshavebeenmappedinDevilCanyon.Steepslopesintheimmediateareahavelimitedmapping;however,itappearslikelythatdikeswillalsobefoundthere.Thisareawillbefurtherinvestigatedin1981usingtechnicalclimberstomaptheslopes.i)BedrockStructureTheargilliteatDevilCanyonhasbeensubjectedtomorethanoneperiodoftectonicdeformationasevidencedbyrefoldedfoldsandthedevelopmentofmultiplefoliations.Foliationiscoincidentwithbed-dingplanes.Wheretwoormorefoliationsarenearlyparallel,theresultingcombinedfoliationcanbequitepronouncedwithaslatytophylliticappearanceasseeninthedamsitearea.Wheretwofolia-tionsareobliquetoeachother,neitherfoliationpredominatesandtherockappears massive.Thestrikeofthebeddingplanefoliationwhichvariesfrom035'to090'(N35'EtoEast)issubparalleltotheriveranddipsfrom45'to80'SE(Figure6.11).Slopesonthenorthbanktendtobeparallelwiththebedding,dippingatabout60'andaresteeperthanthoseonthesouthbank(45').AsattheWatanasite,jointmeasurementsweretakenatalloutcrops,aswellasatfourjointstations(Figure6.12).StationsOCJ-1and2weretakenatriverlevelonthesouthandnorthbanksatthedamsite,respectively.StationDCJ-3isalsoontheriverapproximately3,000feetdownstream.DCJ-4isonthenorthbankabout750feetfromtheriver.Allstationsareinargillite.Foreachstation,joint6-17Approximately3,500feetsoutheastofthedamsite,theargilliteunitisincontactwithgranodiorite/quartzdiorite(Figure4.1).Therockismediumgrainedandconsistsofquartz,plagioclasefeldsparandbiotite.Thecontactbetweenthegranodiorite/dioriteandtheargil-liteisirregularwiththegranodiorite/dioriteintrudingtheargil-lite.Theextentoftheintrusionbeneaththesitehasnotbeendetermined,althoughdioritewasencounteredinBH-2(Figure6.13).Dikesandveinshaveintrudedallrocksinthesitearea.Theargil-litecontainsnumerousfoldedandfaultedquartzveinsandhasbeenintrudedbybothfelsicandmaficdikes.Thegranodiorite/dioriteappearstohavebeenintrudedonlybymaficdikes.Thefelsicdikesarelightyellowish-graytograyandconsistofaplite,rhyoliteandotherunidentifiedsilicicvarieties.Thetexturesvaryfromaphani-tictofinegrained.Maficdikesarefinegrained,darkgray,andappeartobedioritetobasalt(diabase)incomposition.Dikesrangefromlessthan1inchto60feetwide,butaregenerallyabout20feetwide.Dikesstrikefromnorthwesttonorthwithsteeptoverticaldips.Theygenerallyformgullies,andoccasionallyridgeswhereexposedinthecanyonwalls.Thereappearstobenocorrelationbetweenlithologyandmorphologicexpression.Dikeswhichformgulliestendtobeveryclosetocloselyfractured.Someareshearedatthecontactwiththesurroundingrock.NumerousdikeshavebeenmappedinDevilCanyon.Steepslopesintheimmediateareahavelimitedmapping;however,itappearslikelythatdikeswillalsobefoundthere.Thisareawillbefurtherinvestigatedin1981usingtechnicalclimberstomaptheslopes.i)BedrockStructureTheargilliteatDevilCanyonhasbeensubjectedtomorethanoneperiodoftectonicdeformationasevidencedbyrefoldedfoldsandthedevelopmentofmultiplefoliations.Foliationiscoincidentwithbed-dingplanes.Wheretwoormorefoliationsarenearlyparallel,theresultingcombinedfoliationcanbequitepronouncedwithaslatytophylliticappearanceasseeninthedamsitearea.Wheretwofolia-tionsareobliquetoeachother,neitherfoliationpredominatesandtherockappears massive.Thestrikeofthebeddingplanefoliationwhichvariesfrom035'to090'(N35'EtoEast)issubparalleltotheriveranddipsfrom45'to80'SE(Figure6.11).Slopesonthenorthbanktendtobeparallelwiththebedding,dippingatabout60'andaresteeperthanthoseonthesouthbank(45').AsattheWatanasite,jointmeasurementsweretakenatalloutcrops,aswellasatfourjointstations(Figure6.12).StationsOCJ-1and2weretakenatriverlevelonthesouthandnorthbanksatthedamsite,respectively.StationDCJ-3isalsoontheriverapproximately3,000feetdownstream.DCJ-4isonthenorthbankabout750feetfromtheriver.Allstationsareinargillite.Foreachstation,joint6-17 measurementswereplottedonthelowerhemisphereofaSchmidtequaareastereonetandcontouredat3,5,7,10and15percentcontourintervals.StereonetsforeachstationareshownonFigures6.14(a-d).OnemajorandthreeminorjointsetsweremappedatDevilCanyon.ThesesetsappeartobesimilartothosemappeduyWPRS(19).Tabl6.3summarizesthejointcharacteristics.Themajorjointset,Setstrikesapproximatelynorthwestwithanaveragedipof85·NE.Itiprominentatalloutcropsandjointstations.Thissetisplanar\Iasmoothtoroughsurface.Ontheleftbank,ontheuppercanyonwalls,SetIjointsareopenasmuchas6inches;however,theverticalextentoftheopennessisunknown.JointSetIIstrikesapproximatelynortheastanddips75·to85·NWThespacingrangesfrom3to15feet.LikeSetI,SetIIalsohasopenjointsonthesouthbank(Figure6.12).Thesejointsdiptowatheriverandmaybepotentialplanesforslopefailure.JointSetIIIisbeddingplanefoliationorcleavage.Thejointsurfaceconditionisvariablefromplaneandsmoothtoirregularanrough.JointSetIVisacombinationofseverallowanglejointsets.Thevaryinorientationfromnortheast,eastandnorthwestwithdipslethan30·tothenorthwest,southandnortheastrespectively.Surfaconditionrangesfromplaneandsmoothtoirregularandrough.Jointspacingintheboringsrangesfromlessthanonefootto10fwithspacingandtightnessincreasingwithdepth.Ironstainingiscommonalongthejointsurfacesandnumerouscalcite"healed"jointwerealsoencountered.Severalfractureandshearzoneshavebeenmappedalongthecanyonwallsandinthedrillholes(Figure6.12andAppendixB-2).Ingeneral,thesezonesarecharacterizedbyhighlyfracturedandcrusrock,moderatetohighweatheringdependingonlocation,claygougehigherpermeabilityandcorelossduringdrilling.Withdepth,thezonesbecomeconsiderablynarrower,tighterandmorewidelyspaced.Thetrendofthesezonesareapproximatelynorthwestandnortheast,paralleltojointSetsIandII.The1981programwilldelineatethesezonesinmoredetail.Thesezonesaremarkedbyhighlyfrac-turedandshearedrockwithclaygouge.OfthethreeholesdrilledthepoorestqualityrockwasencounteredinBH-4(Table6.4),whichwasdrilledbeneaththelakeonthesouthbank.Althoughthequalioftherockinthisholewasnotashighastheotherholes,noevidencecouldbefoundintheboringfromanymajorshearing,althou9minorshearwasencounteredfrom293to296feet.Additionaldrillwill,however,berequiredinthisarea.(iii)RockQualityTheoverallnatureoftherockisthatofaveryhard,brittlerockmass,resemblingthatofhigher-grademetamorphicrocks.Thejoint6-18measurementswereplottedonthelowerhemisphereofaSchmidtequaareastereonetandcontouredat3,5,7,10and15percentcontourintervals.StereonetsforeachstationareshownonFigures6.14(a-d).OnemajorandthreeminorjointsetsweremappedatDevilCanyon.ThesesetsappeartobesimilartothosemappeduyWPRS(19).Tabl6.3summarizesthejointcharacteristics.Themajorjointset,Setstrikesapproximatelynorthwestwithanaveragedipof85·NE.Itiprominentatalloutcropsandjointstations.Thissetisplanar\Iasmoothtoroughsurface.Ontheleftbank,ontheuppercanyonwalls,SetIjointsareopenasmuchas6inches;however,theverticalextentoftheopennessisunknown.JointSetIIstrikesapproximatelynortheastanddips75·to85·NWThespacingrangesfrom3to15feet.LikeSetI,SetIIalsohasopenjointsonthesouthbank(Figure6.12).Thesejointsdiptowatheriverandmaybepotentialplanesforslopefailure.JointSetIIIisbeddingplanefoliationorcleavage.Thejointsurfaceconditionisvariablefromplaneandsmoothtoirregularanrough.JointSetIVisacombinationofseverallowanglejointsets.Thevaryinorientationfromnortheast,eastandnorthwestwithdipslethan30·tothenorthwest,southandnortheastrespectively.Surfaconditionrangesfromplaneandsmoothtoirregularandrough.Jointspacingintheboringsrangesfromlessthanonefootto10fwithspacingandtightnessincreasingwithdepth.Ironstainingiscommonalongthejointsurfacesandnumerouscalcite"healed"jointwerealsoencountered.Severalfractureandshearzoneshavebeenmappedalongthecanyonwallsandinthedrillholes(Figure6.12andAppendixB-2).Ingeneral,thesezonesarecharacterizedbyhighlyfracturedandcrusrock,moderatetohighweatheringdependingonlocation,claygougehigherpermeabilityandcorelossduringdrilling.Withdepth,thezonesbecomeconsiderablynarrower,tighterandmorewidelyspaced.Thetrendofthesezonesareapproximatelynorthwestandnortheast,paralleltojointSetsIandII.The1981programwilldelineatethesezonesinmoredetail.Thesezonesaremarkedbyhighlyfrac-turedandshearedrockwithclaygouge.OfthethreeholesdrilledthepoorestqualityrockwasencounteredinBH-4(Table6.4),whichwasdrilledbeneaththelakeonthesouthbank.Althoughthequalioftherockinthisholewasnotashighastheotherholes,noevidencecouldbefoundintheboringfromanymajorshearing,althou9minorshearwasencounteredfrom293to296feet.Additionaldrillwill,however,berequiredinthisarea.(iii)RockQualityTheoverallnatureoftherockisthatofaveryhard,brittlerockmass,resemblingthatofhigher-grademetamorphicrocks.Thejoint6-18 andfracturingappearstobecontrolledmorebythedirectionofregionalstressandfoliationthanbythebeddingstructure.AsatWatana,theweatheringpenetrationislimitedtothepercolationpathsaffordedbyopenjointsandfracturezones.Amorecompleteevaluationofweatheringmechanismsandextentofchemicalandhydrothermalattentionwillbeattemptedinthe1981pr09ram.Indicationstodatearethattherockissuitableforconstructionoflargestructures,althoughsomedeterioratedzoneswillrequiresignificantremedialwork.(iv)RockPermeabilityThevaluescomputedfromthewaterpressuretestsshowrelativelylowpermeabilitiesontheorderof10-4to10-6cm/sec(AppendixB-2).Inmostcases,thezonesofhigherpermeabilitycorrelatewiththeupperweatheredzonesandthemorefracturedzonesatdepth.ExaminationofthedatafromtestsperformedinBH-4showedminimalwaterlosseseveninmorehighlyfracturedones,indicatingtheoveralltightnessoftherockmass.GroundwaterGroundwatermigrationwithintherockisrestrictedtojointsandfrac-tures.AsdescribedinSection5,severalpiezometershavebeeninstalledtodefinethesitegroundwaterregime.Datacollectedthusfaratthesitehasbeeninsufficienttoaccuratelydefinethegroundwaterconditions;however,itisassumedthatthegroundwaterlevelisasubduedreplicaofthesurfacetopographywiththegradientsbeingtowardstheriverandlakes.PermafrostPreliminarytemperaturemeasurementsmadeintheboringsshowednoperma-frostconditionsoneithersideoftheriver.Additionalmonitoringoftheinstrumentationwillbecarriedoutthroughouttheprojecttoaccuratelydefineatemperatureprofile.BorrowAreasThe1980investigationsattheDevilCanyonsiteweredesignedtoconfirmtheconcreteaggregatesourcenearCheechakoCreekpreviouslyidentifiedbytheUSBR.Reconnaissancemappingofthesurroundingareawasalsoconduct-edtoidentifysourcesofimperviousmaterialsforthecofferdamandthesaddledam.(i)ConcreteAggregateThepreviousinvestigationshadidentifiedthealluvialfanneartheCheechakoCreekconfluence,approximately1,000feetupstreamoftheproposeddam,astheprimarysourceofconcreteaggregate.However,duetolimitationsonaccessatthesite,-onlytwoaugerholesweredrilledduringthe1980investigation.6-19andfracturingappearstobecontrolledmorebythedirectionofregionalstressandfoliationthanbythebeddingstructure.AsatWatana,theweatheringpenetrationislimitedtothepercolationpathsaffordedbyopenjointsandfracturezones.Amorecompleteevaluationofweatheringmechanismsandextentofchemicalandhydrothermalattentionwillbeattemptedinthe1981pr09ram.Indicationstodatearethattherockissuitableforconstructionoflargestructures,althoughsomedeterioratedzoneswillrequiresignificantremedialwork.(iv)RockPermeabilityThevaluescomputedfromthewaterpressuretestsshowrelativelylowpermeabilitiesontheorderof10-4to10-6cm/sec(AppendixB-2).Inmostcases,thezonesofhigherpermeabilitycorrelatewiththeupperweatheredzonesandthemorefracturedzonesatdepth.ExaminationofthedatafromtestsperformedinBH-4showedminimalwaterlosseseveninmorehighlyfracturedones,indicatingtheoveralltightnessoftherockmass.GroundwaterGroundwatermigrationwithintherockisrestrictedtojointsandfrac-tures.AsdescribedinSection5,severalpiezometershavebeeninstalledtodefinethesitegroundwaterregime.Datacollectedthusfaratthesitehasbeeninsufficienttoaccuratelydefinethegroundwaterconditions;however,itisassumedthatthegroundwaterlevelisasubduedreplicaofthesurfacetopographywiththegradientsbeingtowardstheriverandlakes.PermafrostPreliminarytemperaturemeasurementsmadeintheboringsshowednoperma-frostconditionsoneithersideoftheriver.Additionalmonitoringoftheinstrumentationwillbecarriedoutthroughouttheprojecttoaccuratelydefineatemperatureprofile.BorrowAreasThe1980investigationsattheDevilCanyonsiteweredesignedtoconfirmtheconcreteaggregatesourcenearCheechakoCreekpreviouslyidentifiedbytheUSBR.Reconnaissancemappingofthesurroundingareawasalsoconduct-edtoidentifysourcesofimperviousmaterialsforthecofferdamandthesaddledam.(i)ConcreteAggregateThepreviousinvestigationshadidentifiedthealluvialfanneartheCheechakoCreekconfluence,approximately1,000feetupstreamoftheproposeddam,astheprimarysourceofconcreteaggregate.However,duetolimitationsonaccessatthesite,-onlytwoaugerholesweredrilledduringthe1980investigation.6-19 6-20(iii)AdditionalMaterialSourceReconnaissancemappingoftheareasadjacenttothecanyonbythisapreviousinvestigationshasshownthattheareaismantledwithout,washandtillmaterialsseveralfeetthick.Inaddition,theburiedchannelareaonthesouthabutmentisfilledwithsome90feetofglcialmaterial.Thismaterialwasdescribedduringthefieldprogramasgenerallydense,wellgradedandcomposedofparticlesranginginsizefromrockflourtoboulders.Thismaterialmayprovideasourcofimperviousfill,butwillrequiretestingtodeterminesuitability.3/4to1-11selectivetests,thereappearstobeadeficiencyofHowever,thiscouldbeaccommodatedbythelocalmorainalmaterials.FromtheUSSRinchgravel.processingofTheseholes,locatedinthewesternsideofthefan,weredrilledtodepthsof11and23feetrespectively.Datafromtheseholesindicathatathinmantleoforganicmaterialoverliesthreetofourfeetasiltysand.Belowthesandisalayerofsandygravelwitha\racesiltandscatteredbouldersandcobblesthathinderthedrillingprocess.SeismiclinesrunbyShannon&WilsonfortheCOE(14,18)indicatethatthislayerisasmuchas80feetthick,extendingtoapproximatelyelevation870feet.ResultsofthelaboratorytestingconductedbytheUSSR(19)indicatthatthematerialfromthisfanisofadequatequalityforuseascocreteaggregate.Thegravelparticlesarestreamwornandgenerallyrounded,withaccompanyingsubangularsands.Petrographicanalysesthesandandgravelindicatesthatthefancompositionincludesquardiorites,granites,andesites,diorites,dacites,metavolcanicrocksaplites,breccias,schists,phyllites,argillites,andamphibolites.Generallythematerialisofgoodqualitywithlessthan2percentdeleteriousconstituentssuchaschert,muscovite,andargillite.1particlesaregenerallyfreshwith13percentofthematerialtestedshowingdeteriorationorweatheringeffects.(ii)ImperviousMaterialTwoterraceshavebeenmappedontheeastsideofCheechakoCreeksoutheastoftheproposeddamaxis.Thegravelintheseterracesiscoarserthaninthealluvialfan,butmayprovideadditionalgranulamaterialafterprocessing.(f)ReservoirGeologyTheDevilCanyonReservoirwillbeconfinedtothenarrowcanyonoftheSusitnaRiver.Thetopographyinandaroundthereservoirisbedrockcontrolled.Overburdenisthintoabsent,exceptintheupperreachesoftheproposedreservoirwherealluvialdepositscoverthevalleyfloor.6-20(iii)AdditionalMaterialSourceReconnaissancemappingoftheareasadjacenttothecanyonbythisapreviousinvestigationshasshownthattheareaismantledwithout,washandtillmaterialsseveralfeetthick.Inaddition,theburiedchannelareaonthesouthabutmentisfilledwithsome90feetofglcialmaterial.Thismaterialwasdescribedduringthefieldprogramasgenerallydense,wellgradedandcomposedofparticlesranginginsizefromrockflourtoboulders.Thismaterialmayprovideasourcofimperviousfill,butwillrequiretestingtodeterminesuitability.3/4to1-11selectivetests,thereappearstobeadeficiencyofHowever,thiscouldbeaccommodatedbythelocalmorainalmaterials.FromtheUSSRinchgravel.processingofTheseholes,locatedinthewesternsideofthefan,weredrilledtodepthsof11and23feetrespectively.Datafromtheseholesindicathatathinmantleoforganicmaterialoverliesthreetofourfeetasiltysand.Belowthesandisalayerofsandygravelwitha\racesiltandscatteredbouldersandcobblesthathinderthedrillingprocess.SeismiclinesrunbyShannon&WilsonfortheCOE(14,18)indicatethatthislayerisasmuchas80feetthick,extendingtoapproximatelyelevation870feet.ResultsofthelaboratorytestingconductedbytheUSSR(19)indicatthatthematerialfromthisfanisofadequatequalityforuseascocreteaggregate.Thegravelparticlesarestreamwornandgenerallyrounded,withaccompanyingsubangularsands.Petrographicanalysesthesandandgravelindicatesthatthefancompositionincludesquardiorites,granites,andesites,diorites,dacites,metavolcanicrocksaplites,breccias,schists,phyllites,argillites,andamphibolites.Generallythematerialisofgoodqualitywithlessthan2percentdeleteriousconstituentssuchaschert,muscovite,andargillite.1particlesaregenerallyfreshwith13percentofthematerialtestedshowingdeteriorationorweatheringeffects.(ii)ImperviousMaterialTwoterraceshavebeenmappedontheeastsideofCheechakoCreeksoutheastoftheproposeddamaxis.Thegravelintheseterracesiscoarserthaninthealluvialfan,butmayprovideadditionalgranulamaterialafterprocessing.(f)ReservoirGeologyTheDevilCanyonReservoirwillbeconfinedtothenarrowcanyonoftheSusitnaRiver.Thetopographyinandaroundthereservoirisbedrockcontrolled.Overburdenisthintoabsent,exceptintheupperreachesoftheproposedreservoirwherealluvialdepositscoverthevalleyfloor. largeintrusiveplutonicbodywhichunderliestheWatanasite(seeion6.1)alsoextendsbeneathadjacentslopes.Itispredominantlyaotitegranodioritewithlocalareasofquartzdioriteanddiorite.Itisghtgraytopink,mediumgrainedandcomposedofquartz,feldspar,bio-teandhornblende.Themostcommonmaficmineralisbiotite.When,therockhasalightyellow-grayorpinkishyellow-graycolor,whereitishighlyoxidizedandironstained.Thegranodioriteis1ymassive,competent,andhardwitntheexceptionoftherockex-ontheuplandnorthoftheSusitnaRiverwherethebiotiteioritehasbeenbadlydecomposedasaresultofphysicalweathering.otherprincipalrocktypesinthereservoirareaaretheargilliteand,whichareexposedattheDevilCanyondamsite.Insummary,thelitehasbeenintrudedbythemassivegranodioriteandasaresult,isolatedroofpendantsoftheargilliteandgraywackearefoundthroughoutthereservoirandsurroundingareas.Theargi11ite/vWilck:evariestoaphylliteoflowmetamorphicgrade,withpossibleatedschistoutcrops.rockhasbeenisoc1inal1yfoldedintosteeplydippingstructureswhich1ystrikenortheast-southwest.ThecontactbetweentheargillitethebiotitegranodioritecrossestheSusitnaRiverjustupstreamofthe1Canyondamsite.Itisnon-conformableandcharacterizedbyanaphanitictexturewithanapparentwidechilledzone.Thetrendofcontactisroughlynortheast-southwestasitcrossestheriver.Sever-largeoutcropareasoftheargillitewhicharecompletelysurroundedbybiotitegranodioritearelocatedintheDevilCreekarea(Figure4.1).1iminaryjointmeasurementsmadeinthereservoirareaindicatestruc-trendssimilartothoseencounteredatthedamsite(Table6.3).intspacingatthesestationsrangedupto3feet.6-21largeintrusiveplutonicbodywhichunderliestheWatanasite(seeion6.1)alsoextendsbeneathadjacentslopes.Itispredominantlyaotitegranodioritewithlocalareasofquartzdioriteanddiorite.Itisghtgraytopink,mediumgrainedandcomposedofquartz,feldspar,bio-teandhornblende.Themostcommonmaficmineralisbiotite.When,therockhasalightyellow-grayorpinkishyellow-graycolor,whereitishighlyoxidizedandironstained.Thegranodioriteis1ymassive,competent,andhardwitntheexceptionoftherockex-ontheuplandnorthoftheSusitnaRiverwherethebiotiteioritehasbeenbadlydecomposedasaresultofphysicalweathering.otherprincipalrocktypesinthereservoirareaaretheargilliteand,whichareexposedattheDevilCanyondamsite.Insummary,thelitehasbeenintrudedbythemassivegranodioriteandasaresult,isolatedroofpendantsoftheargilliteandgraywackearefoundthroughoutthereservoirandsurroundingareas.Theargi11ite/vWilck:evariestoaphylliteoflowmetamorphicgrade,withpossibleatedschistoutcrops.rockhasbeenisoc1inal1yfoldedintosteeplydippingstructureswhich1ystrikenortheast-southwest.ThecontactbetweentheargillitethebiotitegranodioritecrossestheSusitnaRiverjustupstreamofthe1Canyondamsite.Itisnon-conformableandcharacterizedbyanaphanitictexturewithanapparentwidechilledzone.Thetrendofcontactisroughlynortheast-southwestasitcrossestheriver.Sever-largeoutcropareasoftheargillitewhicharecompletelysurroundedbybiotitegranodioritearelocatedintheDevilCreekarea(Figure4.1).1iminaryjointmeasurementsmadeinthereservoirareaindicatestruc-trendssimilartothoseencounteredatthedamsite(Table6.3).intspacingatthesestationsrangedupto3feet.6-21 Strike Dip Spacing Joint Set (Range/Av)(Range/Av) (Range/Av) Surface Coating Remarks (excluding 294·-345·/320·65·NE-70·SW/90·1"-15'/1-2 1 Planar to slightly Minor carbonate Parallel to major WJ-1 and WJ-9)curved,smooth,shears occasionally rough, closed;but open in fracture zones WJ-1 and WJ-9 310·-0·/335·70·NE-70·SW/90·1"-15/1-2'Same as above None Parallel to major shears rr 20·-60·/45·70·NW-70·SE/90·311 -2'/6"-1'Planar to slightly Minor carbonate No shearing curved,smooth I I I 345·-25·/10·50 o _60 o W Variable 211 _5 1 Planar to slightly None Parallel to minor 50·-85·E curved,smooth to shears rough IV East-West less than 40°Variab Ie,Irregular,rough None No shearing and others 1"-10' V 260·-325·/280·65·N-70·S/611 -1'Planar smooth to Minor carbonate Parallel to minor mostly north rough shears VI 60·-80·/65·60·NW/60·SE 6"_4'/1/2'Planar to slightly Minor carbonate No shearing curved,roulj1 Strike Dip Spacing Joint Set (Range/Av)(Range/Av) (Range/Av)Surface Coating Remarks (excluding 294·-345·/320·65·NE-70·SW/90·1"-15'/1-2 1 Planar to slightly Minor carbonate Paralle I to major WJ-1 and WJ-9)curved,smooth,shears occasionally rough, closed;but open in fracture zones WJ-1 and WJ-9 310·-0·/335·70·NE-70·SW/90·1"-15/1-2'Same as above None Parallel to major shears rr 20·-60·/45·70·NW-70·SE/90·311 -2'/6"-1'Planar to slightly Minor carbonate No shearing curved,smooth I I I 345·-25·/10·50 o _60 o W Variable 2 11 _5 1 Planar to slightly None Parallel to minor 50·-85·E curved,smooth to shears rough IV East-West less than 40°Variab Ie,Irregular,rough None No shearing and others 1"-10' V 260·-325·/280·65·N-70·S/611 -1'Planar smooth to Minor carbonate Para lie I to minor mostly north rough shears VI 60·-80·/65·60·NW/60·SE 6"_4'/1/2'Planar to slightly Minor carbonate No shearing curved,roulj1 TABLE6.2:WATANA-BOREHOLEROCKQUALITYDISTRIBUTIONROCKQUALITYCLASSIFICATION(MODIFIEDFROMDEERE,1963)BOREHOLEPERCENTAGEOFRECOVEREDCOREINSPECIFICRQDRANGESNUMBERo-z5%25-50%50-75%75-90%90-95%95-100%--- ---------BH-2191522171314BH-65213221543BH-84718161838VeryPoorPoorFairGoodVeryGoodExcellent0-25%25-5m~50-75%75-90%90-95%95-100%TABLE6.2:WATANA-BOREHOLEROCKQUALITYDISTRIBUTIONROCKQUALITYCLASSIFICATION(MODIFIEDFROMDEERE,1963)BOREHOLEPERCENTAGEOFRECOVEREDCOREINSPECIFICRQDRANGESNUMBERo-z5%25-50%50-75%75-90%90-95%95-100%--- ---------BH-2191522171314BH-65213221543BH-84718161838VeryPoorPoorFairGoodVeryGoodExcellent0-25%25-5m~50-75%75-90%90-95%95-100% TABLE 6.3:OEVIL CANYON -JOINT CHARACTERISTICS IV Strike Oip Spaciny (Range Surface Coating 1"to 2 1 /6"Planar,smooth to Iron oxide, 335"B5"NE rough,some open quartz B5"NW 6"to 15 1 /1'Planar,smooth "SE 2"to 2'Planar to irregular, BO"smooth to rough 040"to 060"25"to 30"NW 2 11 to 4'/1'Planar to irregular, smooth to rough 90"5"S 340"20"NE TABLE 6.3:OEVIL CANYON -JOINT CHARACTERISTICS IV Strike Oip Spaciny (Range/Av)(Range/Av)(Range Surface Coating 320"to 350"/7B"NE to n"sw/1"to 2 1 /6"Planar,smooth to Iron oxide, 335"B5"NE rough,some open quartz 030"to 060 0 75°to B5"NW 6"to 15 1 /1'Planar,smooth 035"to 090"/45"to BO"SE 2"to 2'Planar to irregular, BO"smooth to rough 040"to 060"25"to 30"NW 2 11 to 4'/1'Planar to irregular, smooth to rough 90"5"S 340"20"NE TABLE6.4:DEVILCANYON-BOREHOLEROCKQUALITYDISTRIBUTIONROCKQUALITYCLASSIFICATION(MODIFIEDFROMDEERE,1963)BOREHOLEPERCENTAGEOFRECOVEREDCOREINSPECIFICRQORANGESNUMBER0-25%25-50%50-/S%75-9m~90-95%95-100%------BH-122 9211551BH-237142055BH-41816221637VeryPoorPoorFairGoadVeryGoadExcellent0-25%25-50%50-75%75-90%90-95%95-100%TABLE6.4:DEVILCANYON-BOREHOLEROCKQUALITYDISTRIBUTIONROCKQUALITYCLASSIFICATION(MODIFIEDFROMDEERE,1963)BOREHOLEPERCENTAGEOFRECOVEREDCOREINSPECIFICRQORANGESNUMBER0-25%25-50%50-/S%75-9m~90-95%95-100%------BH-122 9211551BH-237142055BH-41816221637VeryPoorPoorFairGoadVeryGoadExcellent0-25%25-50%50-75%75-90%90-95%95-100% 2000CONTOURINTERVAL100FEETFIGURE6.1NOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)SECTIONSSHOWNONFIGURE6.51000010002000=·~~!B_~-!i_;J·~_~-~IIOi~~~~_!SCALEINFEET®API7~.oOI/'1,;'J,;®API8~/®API9(l)CDBORROWAREAD-r--r---jl'-/QUARRYAoSEISMICLINES:DM-CORPSOFENGINEERS(1975)SW-CORPSOFENGINEERS(1978)SL-ACRESAMERICANINC.(1980)CROSSSECTIONlJLEGENDWATANA-EXPLORATIONLOCATIONMAPCORPSOFENGINEERS,1978___TPTESTPIT®APAUGERHOLEoDHCOREDRILLHOLEoDRROTARYDRILLHOLEACRESAMERICANINC.,1980oBHBOREHOLE®AHAUGERHOLEBORROWAREAENOTE:FORLOCATIONOFBORROWAREAC,SEEFIGURE6.9REFERENCE:U.S.ARMYCORPSOFENGINEERS,1979(18)2000CONTOURINTERVAL100FEETFIGURE6.1NOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)SECTIONSSHOWNONFIGURE6.51000010002000=·~~!B_~-!i_;J·~_~-~IIOi~~~~_!SCALEINFEET®API7~.oOI/'1,;'J,;®API8~/®API9(l)CDBORROWAREAD-r--r---jl'-/QUARRYAoSEISMICLINES:DM-CORPSOFENGINEERS(1975)SW-CORPSOFENGINEERS(1978)SL-ACRESAMERICANINC.(1980)CROSSSECTIONlJLEGENDWATANA-EXPLORATIONLOCATIONMAPCORPSOFENGINEERS,1978___TPTESTPIT®APAUGERHOLEoDHCOREDRILLHOLEoDRROTARYDRILLHOLEACRESAMERICANINC.,1980oBHBOREHOLE®AHAUGERHOLEBORROWAREAENOTE:FORLOCATIONOFBORROWAREAC,SEEFIGURE6.9REFERENCE:U.S.ARMYCORPSOFENGINEERS,1979(18) 3000!IIFIGURE6.2CONTOURINTERVAL:100FEETSCALEINFEET1000010002000~-..-_-;JNOTE:TOPOGRAPHICCONTOURSAREAPPROXIMATE"--,/"t~I I"I"/I/ // I,/I"._.1/r-'oWATANA-OVERBURDENISOPACHMAPLEGENDDATAPOINTSiiiDRILLHOLE1>.SEISMICLINESTATION----DEPTHTOBEDROCKCONTOURAPPROXIMATE-BURIEDCHANNELTHALWEG~MAJORBEDROCKOUTCROPS~ASMAPPEDREF.U.S.ARMYCORPSOFENGINEERSSUPPLEMENTALFEASIBILITYREPORT1979._15003000!IIFIGURE6.2CONTOURINTERVAL:100FEETSCALEINFEET1000010002000~-..-_-;JNOTE:TOPOGRAPHICCONTOURSAREAPPROXIMATE"--,/"t~I I"I"/I/ // I,/I"._.1/r-'oWATANA-OVERBURDENISOPACHMAPLEGENDDATAPOINTSiiiDRILLHOLE1>.SEISMICLINESTATION----DEPTHTOBEDROCKCONTOURAPPROXIMATE-BURIEDCHANNELTHALWEG~MAJORBEDROCKOUTCROPS~ASMAPPEDREF.U.S.ARMYCORPSOFENGINEERSSUPPLEMENTALFEASIBILITYREPORT1979._1500 NOTES:I)FIELDMAPPINGUNDERTAKENATASCALEOFI:6,000(AERIALPHOTOGRAPHS)2)TOPOGRAPHICCONTOURSAREAPPROXIMATESHEETIOF2198533 534528S27LEGEND1::::::::::1i~~~~~~OLU~S~~T~~g~E~Nj;N6N~~gk~~NESP<;1PORPHYRITICANDESITE,INCLUDINGANDESITIC< • ,'.BASALT,DACITE,ANDRHYODACITE\,P'''jDIORITE,INCLUDINGQUARTZDIORITEAND0;,;;,;:';GRANODIORITE:'b'~-;g.~®OUTCROP-lfSJ-STRIKEANDDIPOFBEDDING-:::::~~~:01-+-VERTICALBEDDING~SHEARANDFRACTUREZONES,SHOWINGDIP-.-SHEAR,VERTICAL.-i!5-SHEARWITHDIP-A.r-SHEAR,VARIABLEDIP~STRIKEANDDIPANDOFJOINTS_VERTICALJOINTSf::,.WJ-2JOINTMEASUREMENTSTATIONx2216Gi2552300----_,,2239(ij167532533WATANA-GEOLOGICMAP,,2208~2184x20982200zoO2100531532REFERENCE'USGS.TALKEETNAMOUNTAINS(D-4)QUADRANGLE.SEWARDMERIDIAN'T32N.R5ENOTES:I)FIELDMAPPINGUNDERTAKENATASCALEOFI:6,000(AERIALPHOTOGRAPHS)2)TOPOGRAPHICCONTOURSAREAPPROXIMATESHEETIOF2198533 534528S27LEGEND1::::::::::1i~~~~~~OLU~S~~T~~g~E~Nj;N6N~~gk~~NESP<;1PORPHYRITICANDESITE,INCLUDINGANDESITIC<•,'.BASALT,DACITE,ANDRHYODACITE\,P'''jDIORITE,INCLUDINGQUARTZDIORITEAND0;,;;,;:';GRANODIORITE:'b'~-;g.~®OUTCROP-lfSJ-STRIKEANDDIPOFBEDDING-:::::~~~:01-+-VERTICALBEDDING~SHEARANDFRACTUREZONES,SHOWINGDIP-.-SHEAR,VERTICAL.-i!5-SHEARWITHDIP-A.r-SHEAR,VARIABLEDIP~STRIKEANDDIPANDOFJOINTS_VERTICALJOINTSf::,.WJ-2JOINTMEASUREMENTSTATIONx2216Gi2552300----_,,2239(ij167532533WATANA-GEOLOGICMAP,,2208~2184x20982200zoO2100531532REFERENCE'USGS.TALKEETNAMOUNTAINS(D-4)QUADRANGLE.SEWARDMERIDIAN'T32N.R5E FIGURE6.3NOTES;Ir/GEOLOGICMAPPINGPERFORMEDOFFRIVERICE,MARCH19BI.2)JOINTMEASUREMENTSDETAILEDININSETSASINDICATED.3)NORTHTOBOTTOMOFSHEET.SHEET20F2PROPOSEDDAMAXIS.....-+--VERTICAL,~VARIABLE-III--VERTICAL_ -CONTACTAPPROXIMATE..DIORITEWATANA-GEOLOGICMAPSHORELINEDIKEFRACTUREDZONESHEARZONE_0"-LEGEND~SHEARZONEWITHDIP~STRIKEANDDIPOFJOINTS6WJ-2JOINTMEASUREMENTSTATIONQUARTZDIORIT~.FIGURE6.3NOTES;Ir/GEOLOGICMAPPINGPERFORMEDOFFRIVERICE,MARCH19BI.2)JOINTMEASUREMENTSDETAILEDININSETSASINDICATED.3)NORTHTOBOTTOMOFSHEET.SHEET20F2PROPOSEDDAMAXIS.....-+--VERTICAL,~VARIABLE-III--VERTICAL_ -CONTACTAPPROXIMATE..DIORITEWATANA-GEOLOGICMAPSHORELINEDIKEFRACTUREDZONESHEARZONELEGEND~SHEARZONEWITHDIP~STRIKEANDDIPOFJOINTS6WJ-2JOINTMEASUREMENTSTATION-"'-QUARTZDIORIT~. E6.4•COREDRILLHOLEROTARYDRILLHOLESEISMICLINEJOINTMEASUREMENTSTATION!:::,WJLEGENDoDHoDR.DM,SW.4iOO~~~Ob~~4~O~O~~8~O~O__'~200ere.....,.......•!SCALEINFEETACRESAMERICANINC.1980oBHBOREHOLE~SEISMICLINECORPSOFENGINEERS,1975a1978<XlAPAUGERHOLEx2198$33 $34S28$27x22162300------x2466<"9Gbx2490x2347WATANA-SITEEXPLORATIONMAPx2208'\22184~2357,------2200----210020(;01900$31$32REFERENCE'USGS.TALKEETNAMOUNTAINS(0-4)QUADRANGLE,SEWARDMERIDIAN'T32N,R5EE6.4•COREDRILLHOLEROTARYDRILLHOLESEISMICLINEJOINTMEASUREMENTSTATION!:::,WJLEGENDoDHoDR.DM,SW.4iOO~~~Ob~~4~O~O~~8~O~O__'~200ere.....,.......•!SCALEINFEETACRESAMERICANINC.1980oBHBOREHOLE~SEISMICLINECORPSOFENGINEERS,1975a1978<XlAPAUGERHOLEx2198$33$34S28$27x22162300------x2466<"9Gbx2490x2347WATANA-SITEEXPLORATIONMAPx2208'\22184~2357,------2200----210020(;01900$31$32REFERENCE'USGS.TALKEETNAMOUNTAINS(0-4)QUADRANGLE,SEWARDMERIDIAN'T32N,R5E 400!FIGURE6.52002001000~SCALEINFEETI)VERTICALANDHORIZONTALSCALEI:I2)SECTIONUNESSHOWNONFIGURE6.1LEGEND~RIVERALLUVIUMI</JGLACIALTILLaSHEARANDFRACTUREZONESoROCKSOUTHDIORITE-GRANODIORITESOUTHBANKBH-8aOTTOM175'UISSOUTHEASTSOUTHBANKBH-8aOTTOM200'U/SBH-8DH-24DH-23(PROJECTED)7'GLACIALTILLDAN~'i'TE~QUARTZDIORITEANDESITE350'DIS40'RIVERALLUVIUMDIORITEANDESITEDIKELOOKINGU/SSECTIONA-ARIVER'SEDGESECTIONB-BLOOKINGU/SDH-21aOTTOM70'DISMODERATELY_FRACTUREDZONEWATANA-GEOLOGICCROSSSECTIONSBH-2BOTTOM300'U/SNORTHBANKNORTHBANKaooREFERENCE:CORPSOFENGINEERS,1979tlB)25001000:50020001000NORTHWEST2500NORTH2000f-UJUJU.~Zo~UJ..JUJ~zo~G:uf1500l;;UJU.400!FIGURE6.52002001000~SCALEINFEETI)VERTICALANDHORIZONTALSCALEI:I2)SECTIONUNESSHOWNONFIGURE6.1LEGEND~RIVERALLUVIUMI</JGLACIALTILLaSHEARANDFRACTUREZONESoROCKSOUTHDIORITE-GRANODIORITESOUTHBANKBH-8aOTTOM175'UISSOUTHEASTSOUTHBANKBH-8aOTTOM200'U/SBH-8DH-24DH-23(PROJECTED)7'GLACIALTILLDAN~'i'TE~QUARTZDIORITEANDESITE350'DIS40'RIVERALLUVIUMDIORITEANDESITEDIKELOOKINGU/SSECTIONA-ARIVER'SEDGESECTIONB-BLOOKINGU/SDH-21aOTTOM70'DISMODERATELY_FRACTUREDZONEWATANA-GEOLOGICCROSSSECTIONSBH-2BOTTOM300'U/SNORTHBANKNORTHBANKaooREFERENCE:CORPSOFENGINEERS,1979tlB)25001000:50020001000NORTHWEST2500NORTH2000f-UJUJU.~Zo~UJ..JUJ~zo~G:uf1500l;;UJU. 90°EEeFIGURE(i6a[11mIecN0°+eoJOINTPLOTTINGMETHODSAMPLEPOINTPLOTSPLOTTINGBYPROJECTIONOFPOINTSTRIKEDJ.E.PERPENDICULARSTOJOINTPLANES800SEONSURFACEOFLOWERHEMISPHERE.AN600EPOINTSAREPLOTTEDONANEQUAL-BN300W90°AREANET.CN4SoE100NWCONTOURSARENUMBEROFJOINTSDN7SoW300NEPER1%OFAREA.EN-S800W90°EEeFIGURE(i6a[11mIecN0°+eoJOINTPLOTTINGMETHODSAMPLEPOINTPLOTSPLOTTINGBYPROJECTIONOFPOINTSTRIKEDJ.E.PERPENDICULARSTOJOINTPLANES800SEONSURFACEOFLOWERHEMISPHERE.AN600EPOINTSAREPLOTTEDONANEQUAL-BN300W90°AREANET.CN4SoE100NWCONTOURSARENUMBEROFJOINTSDN7SoW300NEPER1%OFAREA.EN-S800W JOINTSTEREOGRAPHICPLOTS-WATANAWJ-INOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.3.NUMBEROFPOINTS.IS86.FIGURE&6bII~IRIoSET::szr.SETY.£fl+tSETIV~(:JQSETI(}SET]]IJOINTSTEREOGRAPHICPLOTS-WATANAWJ-INOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.3.NUMBEROFPOINTS.IS86.FIGURE&6bII~IRIoSET::szr.SETY.£fl+tSETIV~(:JQSETI(}SET]]I N00I-I3.18005NOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLO~TEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJ0INTSPER1%OFAREA.3.NUMBEROFPOINTSIS60.WATANA-JOINTCONTOURPLOTSTATIONWJ-2FIGURE6.6c/iii]N00I-I3.18005NOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLO~TEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJ0INTSPER1%OFAREA.3.NUMBEROFPOINTSIS60.WATANA-JOINTCONTOURPLOTSTATIONWJ-2FIGURE6.6c/iii] FIGURE6.6dI-IWATANA-JOINTCONTOURPLOTSTATIONWJ-3PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS.80.FIGURE6.6dI-IWATANA-JOINTCONTOURPLOTSTATIONWJ-3PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS.80. 1-IWATANA-JOINTCONTOURPLOTSTATIONWJ-4900EFIGUREfiGe111mISETYPLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSISlOa.1-IWATANA-JOINTCONTOURPLOTSTATIONWJ-4900EFIGUREfiGe111mISETYPLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSISlOa. SEne~FIGURE6.61IIIRIU-IsmzC?WATANA-JOINTCONTOURPLOTSTATIONWJ-5PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE,POINTSAREPLOTTEDONANEQUAL-AREANET,CONTOURSARENUMBEROFJOINTSPER1%OFAREA,NUMBEROFPOINTSISlOa,S:SEne~FIGURE6.61IIIRIU-IsmzC?WATANA-JOINTCONTOURPLOTSTATIONWJ-5PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE,POINTSAREPLOTTEDONANEQUAL-AREANET,CONTOURSARENUMBEROFJOINTSPER1%OFAREA,NUMBEROFPOINTSISlOa,S: JOINTSTEREOGRAPHICPLOTS-WATANAWJ-6N0°SET~[)PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-NET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS100.FIGURE66gIA~lmIJOINTSTEREOGRAPHICPLOTS-WATANAWJ-6N0°SET~[)PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-NET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS100.FIGURE66gIA~lmI NOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.3.NUMBEROFPOINTSIS100.WATANA-JOINTCONTOURPLOTSTATIONWJ-7FIGURE6.6h1~lmI3N001800SoSET1Yo\NOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.3.NUMBEROFPOINTSIS100.WATANA-JOINTCONTOURPLOTSTATIONWJ-7FIGURE6.6h1~lmI3N001800SoSET1Yo\ WATANA-JOINTCONTOURPLOTSTATIONWJ-8FIGURE6.61IA~IIGoN0°@SET.lY.I-,QPLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS100.WATANA-JOINTCONTOURPLOTSTATIONWJ-8FIGURE6.61IA~IIGoN0°@SET.lY.I-,QPLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS100. WATANA-JOINTCONTOURPLOTSTATIONWJ-9PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS100.N0°oSETrrSETm:SETYWATANA-JOINTCONTOURPLOTSTATIONWJ-9PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS100.N0°oSETrrSETm:SETY WATANA-JOINTCONTOURPLOTSTATIONWJ-IO90°EFIGURE6.6kIIIRIo[)SET~N0°I-IooSETINOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.3.NUMBEROFPOINTSISlOa.WATANA-JOINTCONTOURPLOTSTATIONWJ-IO90°EFIGURE6.6kIIIRIo[)SET~N0°I-IooSETINOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.3.NUMBEROFPOINTSISlOa. FIGURE6.6L111mISETJI.Q//N00SET3ZI1800SI(}SETrsz:SETIIWATANA-JOINTCONTOURPLOTCOMPOSITEPLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE,POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.FIGURE6.6L111mISETJI.Q//N00SET3ZI1800SI(}SETrsz:SETIIWATANA-JOINTCONTOURPLOTCOMPOSITEPLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE,POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA. 86FIGURE6.7NOTESI)READINGSTAKENJULY30,19802)BOREHOLELOCATIONSSHOWNONFIG.6.4DH-28TEMPERATURE(OC)o2 4-21210DH-25TEMPERATURE(OC)2 4 6 8o-24WATANADAMSITE-SUBSURFACETEMPERATUREMEASUREMENTSDH-24TEMPERATURE(OC)-20 2DH-23TEMPERATURE(OC)-20 2DH-12TEMPERATURE(OC)-20 2 486FIGURE6.7NOTESI)READINGSTAKENJULY30,19802)BOREHOLELOCATIONSSHOWNONFIG.6.4DH-28TEMPERATURE(OC)o2 4-21210DH-25TEMPERATURE(OC)2 4 6 8o-24WATANADAMSITE-SUBSURFACETEMPERATUREMEASUREMENTSDH-24TEMPERATURE(OC)-20 2DH-23TEMPERATURE(OC)-20 2DH-12TEMPERATURE(OC)-20 2 4 FIGURE68IMlmINOTES:IlREADINGSTAKENJULY30,19802)BOREHOLELDCATIONSSHOWNONFIG.6.41210DR-22TEMPERATURE(OC)2 4 6 8o-210--8DR-19TEMPERATURE(OC)o2 4 6WATANA-RELICTCHANNELAREASUBSURFACETEMPERATUREMEASUREMENTS-26DR-18TEMPERATURE(OC)o2 4FIGURE68IMlmINOTES:IlREADINGSTAKENJULY30,19802)BOREHOLELDCATIONSSHOWNONFIG.6.41210DR-22TEMPERATURE(OC)2 4 6 8o-210--8DR-19TEMPERATURE(OC)o2 4 6WATANA-RELICTCHANNELAREASUBSURFACETEMPERATUREMEASUREMENTS-26DR-18TEMPERATURE(OC)o2 4 WATANA-POTENTIALBORROWAREASoIIPRESENTLYIDENTIFIED::~::(}WAREA~::\:r:::':::3PROPOSEDNEWAREA"YMH&KFORINVESTIGATIONo.05iSCALEINMILESoFlGURE6.9•WATANA-POTENTIALBORROWAREASoIIPRESENTLYIDENTIFIED::~::(}WAREA~::\:r:::':::3PROPOSEDNEWAREA"YMH&KFORINVESTIGATIONo.05iSCALEINMILESoFlGURE6.9• LEGENDSEISMICUNESJOINTMEASUREMENTSTATIONCROSSSECTIONODCJCONTOURINTERVAL50FEETDASHEDCONTOUR25FEET20002004006001-!~""Iiiii~-liiiiid~-liiiii_~-'iiiii;J~~~;iiiiiiiiiiiiiiiiillSCALEINFEETFIGURE6.10[iii]NOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)SECTIONSHOWNONFIGURE6.13ACRESAMERICANINC.,1980tVBHBOREHOLEoAHAUGERHOLECORPSOFENGINEERS,1978~SEISMICLINESUSBR,1958tVDHBOREHOLE___Tp,S,TESTPITSANDTRENCHESlJDEVILCANYON-EXPLORATIONLOCATIONMAPREFERENCES:I)USGS,TALKEETNAMOUNTAINS,(D-5),ALASKAQUADRANGLESEWARDMERIDIAN:T32N,RIE,S32AND33.2)U.S.ARMYCORPSOFENGINEERS,1979.(18)3)U.S.8UREAUOFRECLAMATION,1960.(19)LEGENDSEISMICUNESJOINTMEASUREMENTSTATIONCROSSSECTIONODCJCONTOURINTERVAL50FEETDASHEDCONTOUR25FEET20002004006001-!~""Iiiii~-liiiiid~-liiiii_~-'iiiii;J~~~;iiiiiiiiiiiiiiiiillSCALEINFEETFIGURE6.10[iii]NOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)SECTIONSHOWNONFIGURE6.13ACRESAMERICANINC.,1980tVBHBOREHOLEoAHAUGERHOLECORPSOFENGINEERS,1978~SEISMICLINESUSBR,1958tVDHBOREHOLE___Tp,S,TESTPITSANDTRENCHESlJDEVILCANYON-EXPLORATIONLOCATIONMAPREFERENCES:I)USGS,TALKEETNAMOUNTAINS,(D-5),ALASKAQUADRANGLESEWARDMERIDIAN:T32N,RIE,S32AND33.2)U.S.ARMYCORPSOFENGINEERS,1979.(18)3)U.S.8UREAUOFRECLAMATION,1960.(19) LEGENDCONTOURINTERVAL50FEETDASHEDCONTOUR25FEETFIGURE6.11DEPTHTOBEDROCKCONTOURAPPROXIMATEMAJORBEDROCKOUTCROPSoDRILLHOLESEISMICLINESTATION2CO0200490600~P=l!iiii;;~-!iiiibJ~-!iiii_~-Iiiiii;J~~~iiiiiiiiijj!SCALEINFEETNOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)ISOPACHCONTOURSAREINFEETBELOWGROUNDSURFACEDEVILCANYON-OVERBURDENISOPACHMAPREFERENCEUSGSTALKEETNAMOUNTAINS(0-5l,ALASKAQUAORANGLE,,SEWARDMERIDIAN:T32N,RIE,S32AND33.LEGENDCONTOURINTERVAL50FEETDASHEDCONTOUR25FEETFIGURE6.11DEPTHTOBEDROCKCONTOURAPPROXIMATEMAJORBEDROCKOUTCROPSoDRILLHOLESEISMICLINESTATION2CO0200490600~P=l!iiii;;~-!iiiibJ~-!iiii_~-Iiiiii;J~~~iiiiiiiiijj!SCALEINFEETNOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)ISOPACHCONTOURSAREINFEETBELOWGROUNDSURFACEDEVILCANYON-OVERBURDENISOPACHMAPREFERENCEUSGSTALKEETNAMOUNTAINS(0-5l,ALASKAQUAORANGLE,,SEWARDMERIDIAN:T32N,RIE,S32AND33. &J)!400!FIGURE6.12SCALEINFEETLEGEND~STRIKEANDDIPOFBEDS75---STRIKEANDDIPOFJOINTS85--D-STRIKEANDDIPOFOPENJOINTSNOTES:I}GEOLOGICMAPPINGUNDERTAKENATTHESCALEOFI:24,000(AERIALPHOTOGRAPHS)2}TOPOGRAPHICCONTOURSAREAPPROXIMATE3)MODIFIEDFROM:KACHADOORIAN,1974(10).....--..." . 1MAJOROUTCROPSOFARGILLITE,,,~__/GRAYWACKEz:::x:::z::x::DIKE,FELSICA.--SHEARZONE,(DASHEDWHEREINDEFINITE)DDCJ-2JOINTMEASUREMENTSTATIONDEVILCANYON-GEOLOGICMAP1700~------___1600REFERENCEUSGS,TALKEETNAMOUNTAINS(D-5),ALASKAQUADRANGLE,SEWARDMERIDAN, T32N,RIE,S32,AND33.&J)!400!FIGURE6.12SCALEINFEETLEGEND~STRIKEANDDIPOFBEDS75---STRIKEANDDIPOFJOINTS85--D-STRIKEANDDIPOFOPENJOINTSNOTES:I}GEOLOGICMAPPINGUNDERTAKENATTHESCALEOFI:24,000(AERIALPHOTOGRAPHS)2}TOPOGRAPHICCONTOURSAREAPPROXIMATE3)MODIFIEDFROM:KACHADOORIAN,1974(10).....--...".1MAJOROUTCROPSOFARGILLITE,,,~__/GRAYWACKEz:::x:::z::x::DIKE,FELSICA.--SHEARZONE,(DASHEDWHEREINDEFINITE)DDCJ-2JOINTMEASUREMENTSTATIONDEVILCANYON-GEOLOGICMAP1700~------___1600REFERENCEUSGS,TALKEETNAMOUNTAINS(D-5),ALASKAQUADRANGLE,SEWARDMERIDAN,T32N,RIE,S32,AND33. 200I100,FIGURE6.13SCALEINFEET100500F-Jo'iiJNOTESI)VERTICALANDHORIZONTALSCALEI:I2)SECTIONLINESHOWNONFIGURE6.10LEGENDL'"}iY!GLACIALTILLOROVERBURDENCJROCK~SHEARANDFRACTUREZONESE::3CONTACTSOUTHMODERATELYFRACTURED/'"",,"53'OVERBUROENOF........."--SILTANDBOULDERS............._,,/'"ARGILLITE-PHYLLITE--\PPROXIMATEOVERBURCENDEPTHINBURIEDCHANNELBH,-4BOTTOM250'DISSOUTHBANKSECTIONRGILLlTE-PHYLLITECROSSDH-I(PROJECTED)GEOLOGICCANYONrRIVER'S_\EDGEi 'DH-13IDEVILLOOKINGU/SNORTHBANKBH-2PROJECTED200'DISGRANODIORITENORTHI.WPFtS,19602.CORPSOFENGINEERS,19783.ACRESAMERICANINC.,1980500600200I100,FIGURE6.13SCALEINFEET100500F-Jo'iiJNOTESI)VERTICALANDHORIZONTALSCALEI:I2)SECTIONLINESHOWNONFIGURE6.10LEGENDL'"}iY!GLACIALTILLOROVERBURDENCJROCK~SHEARANDFRACTUREZONESE::3CONTACTSOUTHMODERATELYFRACTURED/'"",,"53'OVERBUROENOF........."--SILTANDBOULDERS............._,,/'"ARGILLITE-PHYLLITE--\PPROXIMATEOVERBURCENDEPTHINBURIEDCHANNELBH,-4BOTTOM250'DISSOUTHBANKSECTIONRGILLlTE-PHYLLITECROSSDH-I(PROJECTED)GEOLOGICCANYONrRIVER'S_\EDGEi 'DH-13IDEVILLOOKINGU/SNORTHBANKBH-2PROJECTED200'DISGRANODIORITENORTHI.WPFtS,19602.CORPSOFENGINEERS,19783.ACRESAMERICANINC.,1980500600 90°EEeFIGURE(i6a[11mIecN0°+eoJOINTPLOTTINGMETHODSAMPLEPOINTPLOTSPLOTTINGBYPROJECTIONOFPOINTSTRIKEDJ.E.PERPENDICULARSTOJOINTPLANES800SEONSURFACEOFLOWERHEMISPHERE.AN600EPOINTSAREPLOTTEDONANEQUAL-BN300W90°AREANET.CN4SoE100NWCONTOURSARENUMBEROFJOINTSDN7SoW300NEPER1%OFAREA.EN-S800W90°EEeFIGURE(i6a[11mIecN0°+eoJOINTPLOTTINGMETHODSAMPLEPOINTPLOTSPLOTTINGBYPROJECTIONOFPOINTSTRIKEDJ.E.PERPENDICULARSTOJOINTPLANES800SEONSURFACEOFLOWERHEMISPHERE.AN600EPOINTSAREPLOTTEDONANEQUAL-BN300W90°AREANET.CN4SoE100NWCONTOURSARENUMBEROFJOINTSDN7SoW300NEPER1%OFAREA.EN-S800W JOINTSTEREOGRAPHICPLOTS-WATANAWJ-INOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.3.NUMBEROFPOINTS.IS86.FIGURE&6bII~IRIoSET::szr.SETY.£fl+tSETIV~(:JQSETI(}SET]]IJOINTSTEREOGRAPHICPLOTS-WATANAWJ-INOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.3.NUMBEROFPOINTS.IS86.FIGURE&6bII~IRIoSET::szr.SETY.£fl+tSETIV~(:JQSETI(}SET]]I N00I-I3.18005NOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLO~TEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJ0INTSPER1%OFAREA.3.NUMBEROFPOINTSIS60.WATANA-JOINTCONTOURPLOTSTATIONWJ-2FIGURE6.6c/iii]N00I-I3.18005NOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLO~TEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJ0INTSPER1%OFAREA.3.NUMBEROFPOINTSIS60.WATANA-JOINTCONTOURPLOTSTATIONWJ-2FIGURE6.6c/iii] FIGURE6.6dI-IWATANA-JOINTCONTOURPLOTSTATIONWJ-3PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS.80.FIGURE6.6dI-IWATANA-JOINTCONTOURPLOTSTATIONWJ-3PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS.80. 1-IWATANA-JOINTCONTOURPLOTSTATIONWJ-4900EFIGUREfiGe111mISETYPLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSISlOa.1-IWATANA-JOINTCONTOURPLOTSTATIONWJ-4900EFIGUREfiGe111mISETYPLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSISlOa. SEne~FIGURE6.61IIIRIU-IsmzC?WATANA-JOINTCONTOURPLOTSTATIONWJ-5PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE,POINTSAREPLOTTEDONANEQUAL-AREANET,CONTOURSARENUMBEROFJOINTSPER1%OFAREA,NUMBEROFPOINTSISlOa,S:SEne~FIGURE6.61IIIRIU-IsmzC?WATANA-JOINTCONTOURPLOTSTATIONWJ-5PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE,POINTSAREPLOTTEDONANEQUAL-AREANET,CONTOURSARENUMBEROFJOINTSPER1%OFAREA,NUMBEROFPOINTSISlOa,S: JOINTSTEREOGRAPHICPLOTS-WATANAWJ-6N0°SET~[)PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-NET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS100.FIGURE66gIA~lmIJOINTSTEREOGRAPHICPLOTS-WATANAWJ-6N0°SET~[)PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-NET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS100.FIGURE66gIA~lmI NOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.3.NUMBEROFPOINTSIS100.WATANA-JOINTCONTOURPLOTSTATIONWJ-7FIGURE6.6h1~lmI3N001800SoSET1Yo\NOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.3.NUMBEROFPOINTSIS100.WATANA-JOINTCONTOURPLOTSTATIONWJ-7FIGURE6.6h1~lmI3N001800SoSET1Yo\ WATANA-JOINTCONTOURPLOTSTATIONWJ-8FIGURE6.61IA~IIGoN0°@SET.lY.I-,QPLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS100.WATANA-JOINTCONTOURPLOTSTATIONWJ-8FIGURE6.61IA~IIGoN0°@SET.lY.I-,QPLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS100. WATANA-JOINTCONTOURPLOTSTATIONWJ-9PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS100.N0°oSETrrSETm:SETYWATANA-JOINTCONTOURPLOTSTATIONWJ-9PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS100.N0°oSETrrSETm:SETY WATANA-JOINTCONTOURPLOTSTATIONWJ-IO90°EFIGURE6.6kIIIRIo[)SET~N0°I-IooSETINOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.3.NUMBEROFPOINTSISlOa.WATANA-JOINTCONTOURPLOTSTATIONWJ-IO90°EFIGURE6.6kIIIRIo[)SET~N0°I-IooSETINOTES:1.PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.2.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.3.NUMBEROFPOINTSISlOa. FIGURE6.6L111mISETJI.Q//N00SET3ZI1800SI(}SETrsz:SETIIWATANA-JOINTCONTOURPLOTCOMPOSITEPLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE,POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.FIGURE6.6L111mISETJI.Q//N00SET3ZI1800SI(}SETrsz:SETIIWATANA-JOINTCONTOURPLOTCOMPOSITEPLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE,POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA. 86FIGURE6.7NOTESI)READINGSTAKENJULY30,19802)BOREHOLELOCATIONSSHOWNONFIG.6.4DH-28TEMPERATURE(OC)o2 4-21210DH-25TEMPERATURE(OC)2 4 6 8o-24WATANADAMSITE-SUBSURFACETEMPERATUREMEASUREMENTSDH-24TEMPERATURE(OC)-20 2DH-23TEMPERATURE(OC)-20 2DH-12TEMPERATURE(OC)-20 2 486FIGURE6.7NOTESI)READINGSTAKENJULY30,19802)BOREHOLELOCATIONSSHOWNONFIG.6.4DH-28TEMPERATURE(OC)o2 4-21210DH-25TEMPERATURE(OC)2 4 6 8o-24WATANADAMSITE-SUBSURFACETEMPERATUREMEASUREMENTSDH-24TEMPERATURE(OC)-20 2DH-23TEMPERATURE(OC)-20 2DH-12TEMPERATURE(OC)-20 2 4 FIGURE68IMlmINOTES:IlREADINGSTAKENJULY30,19802)BOREHOLELDCATIONSSHOWNONFIG.6.41210DR-22TEMPERATURE(OC)2 4 6 8o-210--8DR-19TEMPERATURE(OC)o2 4 6WATANA-RELICTCHANNELAREASUBSURFACETEMPERATUREMEASUREMENTS-26DR-18TEMPERATURE(OC)o2 4FIGURE68IMlmINOTES:IlREADINGSTAKENJULY30,19802)BOREHOLELDCATIONSSHOWNONFIG.6.41210DR-22TEMPERATURE(OC)2 4 6 8o-210--8DR-19TEMPERATURE(OC)o2 4 6WATANA-RELICTCHANNELAREASUBSURFACETEMPERATUREMEASUREMENTS-26DR-18TEMPERATURE(OC)o2 4 WATANA-POTENTIALBORROWAREASoIIPRESENTLYIDENTIFIED::~::(}WAREA~::\:r:::':::3PROPOSEDNEWAREA"YMH&KFORINVESTIGATIONo.05iSCALEINMILESoFlGURE6.9•WATANA-POTENTIALBORROWAREASoIIPRESENTLYIDENTIFIED::~::(}WAREA~::\:r:::':::3PROPOSEDNEWAREA"YMH&KFORINVESTIGATIONo.05iSCALEINMILESoFlGURE6.9• LEGENDSEISMICUNESJOINTMEASUREMENTSTATIONCROSSSECTIONODCJCONTOURINTERVAL50FEETDASHEDCONTOUR25FEET20002004006001-!~""Iiiii~-liiiiid~-liiiii_~-'iiiii;J~~~;iiiiiiiiiiiiiiiiillSCALEINFEETFIGURE6.10[iii]NOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)SECTIONSHOWNONFIGURE6.13ACRESAMERICANINC.,1980tVBHBOREHOLEoAHAUGERHOLECORPSOFENGINEERS,1978~SEISMICLINESUSBR,1958tVDHBOREHOLE___Tp,S,TESTPITSANDTRENCHESlJDEVILCANYON-EXPLORATIONLOCATIONMAPREFERENCES:I)USGS,TALKEETNAMOUNTAINS,(D-5),ALASKAQUADRANGLESEWARDMERIDIAN:T32N,RIE,S32AND33.2)U.S.ARMYCORPSOFENGINEERS,1979.(18)3)U.S.8UREAUOFRECLAMATION,1960.(19)LEGENDSEISMICUNESJOINTMEASUREMENTSTATIONCROSSSECTIONODCJCONTOURINTERVAL50FEETDASHEDCONTOUR25FEET20002004006001-!~""Iiiii~-liiiiid~-liiiii_~-'iiiii;J~~~;iiiiiiiiiiiiiiiiillSCALEINFEETFIGURE6.10[iii]NOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)SECTIONSHOWNONFIGURE6.13ACRESAMERICANINC.,1980tVBHBOREHOLEoAHAUGERHOLECORPSOFENGINEERS,1978~SEISMICLINESUSBR,1958tVDHBOREHOLE___Tp,S,TESTPITSANDTRENCHESlJDEVILCANYON-EXPLORATIONLOCATIONMAPREFERENCES:I)USGS,TALKEETNAMOUNTAINS,(D-5),ALASKAQUADRANGLESEWARDMERIDIAN:T32N,RIE,S32AND33.2)U.S.ARMYCORPSOFENGINEERS,1979.(18)3)U.S.8UREAUOFRECLAMATION,1960.(19) LEGENDCONTOURINTERVAL50FEETDASHEDCONTOUR25FEETFIGURE6.11DEPTHTOBEDROCKCONTOURAPPROXIMATEMAJORBEDROCKOUTCROPSoDRILLHOLESEISMICLINESTATION2CO0200490600~P=l!iiii;;~-!iiiibJ~-!iiii_~-Iiiiii;J~~~iiiiiiiiijj!SCALEINFEETNOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)ISOPACHCONTOURSAREINFEETBELOWGROUNDSURFACEDEVILCANYON-OVERBURDENISOPACHMAPREFERENCEUSGSTALKEETNAMOUNTAINS(0-5l,ALASKAQUAORANGLE,,SEWARDMERIDIAN:T32N,RIE,S32AND33.LEGENDCONTOURINTERVAL50FEETDASHEDCONTOUR25FEETFIGURE6.11DEPTHTOBEDROCKCONTOURAPPROXIMATEMAJORBEDROCKOUTCROPSoDRILLHOLESEISMICLINESTATION2CO0200490600~P=l!iiii;;~-!iiiibJ~-!iiii_~-Iiiiii;J~~~iiiiiiiiijj!SCALEINFEETNOTES:I)TOPOGRAPHICCONTOURSAREAPPROXIMATE2)ISOPACHCONTOURSAREINFEETBELOWGROUNDSURFACEDEVILCANYON-OVERBURDENISOPACHMAPREFERENCEUSGSTALKEETNAMOUNTAINS(0-5l,ALASKAQUAORANGLE,,SEWARDMERIDIAN:T32N,RIE,S32AND33. &J)!400!FIGURE6.12SCALEINFEETLEGEND~STRIKEANDDIPOFBEDS75---STRIKEANDDIPOFJOINTS85--D-STRIKEANDDIPOFOPENJOINTSNOTES:I}GEOLOGICMAPPINGUNDERTAKENATTHESCALEOFI:24,000(AERIALPHOTOGRAPHS)2}TOPOGRAPHICCONTOURSAREAPPROXIMATE3)MODIFIEDFROM:KACHADOORIAN,1974(10).....--..." . 1MAJOROUTCROPSOFARGILLITE,,,~__/GRAYWACKEz:::x:::z::x::DIKE,FELSICA.--SHEARZONE,(DASHEDWHEREINDEFINITE)DDCJ-2JOINTMEASUREMENTSTATIONDEVILCANYON-GEOLOGICMAP1700~------___1600REFERENCEUSGS,TALKEETNAMOUNTAINS(D-5),ALASKAQUADRANGLE,SEWARDMERIDAN, T32N,RIE,S32,AND33.&J)!400!FIGURE6.12SCALEINFEETLEGEND~STRIKEANDDIPOFBEDS75---STRIKEANDDIPOFJOINTS85--D-STRIKEANDDIPOFOPENJOINTSNOTES:I}GEOLOGICMAPPINGUNDERTAKENATTHESCALEOFI:24,000(AERIALPHOTOGRAPHS)2}TOPOGRAPHICCONTOURSAREAPPROXIMATE3)MODIFIEDFROM:KACHADOORIAN,1974(10).....--...".1MAJOROUTCROPSOFARGILLITE,,,~__/GRAYWACKEz:::x:::z::x::DIKE,FELSICA.--SHEARZONE,(DASHEDWHEREINDEFINITE)DDCJ-2JOINTMEASUREMENTSTATIONDEVILCANYON-GEOLOGICMAP1700~------___1600REFERENCEUSGS,TALKEETNAMOUNTAINS(D-5),ALASKAQUADRANGLE,SEWARDMERIDAN,T32N,RIE,S32,AND33. 200I100,FIGURE6.13SCALEINFEET100500F-Jo'iiJNOTESI)VERTICALANDHORIZONTALSCALEI:I2)SECTIONLINESHOWNONFIGURE6.10LEGENDL'"}iY!GLACIALTILLOROVERBURDENCJROCK~SHEARANDFRACTUREZONESE::3CONTACTSOUTHMODERATELYFRACTURED/'"",,"53'OVERBUROENOF........."--SILTANDBOULDERS............._,,/'"ARGILLITE-PHYLLITE--\PPROXIMATEOVERBURCENDEPTHINBURIEDCHANNELBH,-4BOTTOM250'DISSOUTHBANKSECTIONRGILLlTE-PHYLLITECROSSDH-I(PROJECTED)GEOLOGICCANYONrRIVER'S_\EDGEi 'DH-13IDEVILLOOKINGU/SNORTHBANKBH-2PROJECTED200'DISGRANODIORITENORTHI.WPFtS,19602.CORPSOFENGINEERS,19783.ACRESAMERICANINC.,1980500600200I100,FIGURE6.13SCALEINFEET100500F-Jo'iiJNOTESI)VERTICALANDHORIZONTALSCALEI:I2)SECTIONLINESHOWNONFIGURE6.10LEGENDL'"}iY!GLACIALTILLOROVERBURDENCJROCK~SHEARANDFRACTUREZONESE::3CONTACTSOUTHMODERATELYFRACTURED/'"",,"53'OVERBUROENOF........."--SILTANDBOULDERS............._,,/'"ARGILLITE-PHYLLITE--\PPROXIMATEOVERBURCENDEPTHINBURIEDCHANNELBH,-4BOTTOM250'DISSOUTHBANKSECTIONRGILLlTE-PHYLLITECROSSDH-I(PROJECTED)GEOLOGICCANYONrRIVER'S_\EDGEi 'DH-13IDEVILLOOKINGU/SNORTHBANKBH-2PROJECTED200'DISGRANODIORITENORTHI.WPFtS,19602.CORPSOFENGINEERS,19783.ACRESAMERICANINC.,1980500600 N0°SE~_:SETNQPLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE,POINTSAREPLOTTEDONANEQUAL-AREANET,CONTOURSARENUMBEROFJOINTSPER1%OFAREA,NUMBEROFPOINTSIS93.DEVILCANYON-JOINTCONTOURPLOTSTATIONDCJ-IFIGURE~4a111mIN0°SE~_:SETNQPLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE,POINTSAREPLOTTEDONANEQUAL-AREANET,CONTOURSARENUMBEROFJOINTSPER1%OFAREA,NUMBEROFPOINTSIS93.DEVILCANYON-JOINTCONTOURPLOTSTATIONDCJ-IFIGURE~4a111mI oSET]Y900EFIGURE614b111mIN0°QDEVILCANYON-JOINTCONTOURPLOTSTATIONDCJ- 2SETIPLOTTINGBYPROJECTIONOF•PERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS100.oSET]Y900EFIGURE614b111mIN0°QDEVILCANYON-JOINTCONTOURPLOTSTATIONDCJ- 2SETIPLOTTINGBYPROJECTIONOF•PERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.NUMBEROFPOINTSIS100. LOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-REANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.UMBEROFPOINTSIS100,DEVILCANYON-JOINTCONTOURPLOTSTATIONDCJ- 3RGURE614cIMIRILOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-REANET.CONTOURSARENUMBEROFJOINTSPER1%OFAREA.UMBEROFPOINTSIS100,DEVILCANYON-JOINTCONTOURPLOTSTATIONDCJ-3RGURE614cIMIRI SET1YoFIGURE6.14dIBlmIN0°I-,0~SETm\Q)DEVILCANYON-JOINTCONTOURPLOTSTATIONDCJ-4PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET,CONTOURSARENUMBEROFJOINTSPER1%OFAREA,NUMBEROFPOINTSIS100,SET1YoFIGURE6.14dIBlmIN0°I-,0~SETm\Q)DEVILCANYON-JOINTCONTOURPLOTSTATIONDCJ-4PLOTTINGBYPROJECTIONOFPERPENDICULARSTOJOINTPLANESONSURFACEOFLOWERHEMISPHERE.POINTSAREPLOTTEDONANEQUAL-AREANET,CONTOURSARENUMBEROFJOINTSPER1%OFAREA,NUMBEROFPOINTSIS100, M.P.,StructuralGeology,Prentice-HallInc,NewJersey,,1962.·Jr.,"TectonicImplicationsofaLatePaleozoicVolcanicArcinaMountains,SouthcentralAlaska",Geology,Vol4,No.1,52,1976.·Jr.,"TheDenaliFaultofSouthernAlaska:TheCaseforMinoranMajorDisplacement",TransactionsAmericanGeophysicalUnion,No•46,P1114.·Jr.,Foster,H.L.,Noklegerg,W.J.,"CretaceousAccretionofaSuperterraneandSubsequentDevelopmentoftheDenaliSouthcentralandEasternAlaska",GeologicalSocietyofAmerica,withProrams,p409,1980.B.Jr.,Nelson,W.H.,Jones,D.L.,Silberling,N.J.,Dean,,Morris,M.S.,Lamphere,M.A.,Smith,J.G.,andSilberman,,IIReconnaissanceGeologicMapandGeochronology,TalkeetnaMountainngle,NorthernPartofAnchorageQuadrangle,andSouthwestCornerTyQuadrangle,Alaskall,U.S.GeologicalSurveyOpenFileReport8A,p60.Moore,SubsurfaceGeophysicalExploration,ProposedWatanaontheSusitnaRlver,Alaska,p22,1975.,R.L.,Plafker,G.,Hudson,T.,Tysdal,R.G.,andPavoni,N.,Geology&HoloceneBreaksAlongtheSusitnaSegmentoftheMountainFault,Alaska",U.S.GeologicalSurveyMF-618,1974.L.andShapiro,L.,StructuralLineaments,SeismicityandGeologyTalkeetnaMountainsArea,Alaska,U.s.ArmyCorpsofEngineers,.L.,Siberling,N.J.,Csejtey,B.Jr.,Nelson,W.H.andBloome,IIAgeandStructuralSignificanceoftheChulitnaOphioliteandingRocks,SouthcentralAlaskall,U.S.GeologicalSurvey,ionalPaper1121-A,p21,1978.oorian,R.,IIGeologyoftheDevilCanyonDamsite,Alaskall,U.S.dicalSurvey,OpenFileReport74-40,p17,1974.rom,1.N.V.,IIQuaternaryGeologyoftheKenaiLowlandandGlacialoryoftheCookInletRegion,Alaska",U.S.GeologicalSurvey,essionalPaper443,p69,1964..L.,IIQuaternaryGeologyofAlaskall,U.S.GeologicalSurvey,ssionalPaper835,p145,1975.M.P.,StructuralGeology,Prentice-HallInc,NewJersey,,1962.·Jr.,"TectonicImplicationsofaLatePaleozoicVolcanicArcinaMountains,SouthcentralAlaska",Geology,Vol4,No.1,52,1976.·Jr.,"TheDenaliFaultofSouthernAlaska:TheCaseforMinoranMajorDisplacement",TransactionsAmericanGeophysicalUnion,No•46,P1114.·Jr.,Foster,H.L.,Noklegerg,W.J.,"CretaceousAccretionofaSuperterraneandSubsequentDevelopmentoftheDenaliSouthcentralandEasternAlaska",GeologicalSocietyofAmerica,withProrams,p409,1980.B.Jr.,Nelson,W.H.,Jones,D.L.,Silberling,N.J.,Dean,,Morris,M.S.,Lamphere,M.A.,Smith,J.G.,andSilberman,,IIReconnaissanceGeologicMapandGeochronology,TalkeetnaMountainngle,NorthernPartofAnchorageQuadrangle,andSouthwestCornerTyQuadrangle,Alaskall,U.S.GeologicalSurveyOpenFileReport8A,p60.Moore,SubsurfaceGeophysicalExploration,ProposedWatanaontheSusitnaRlver,Alaska,p22,1975.,R.L.,Plafker,G.,Hudson,T.,Tysdal,R.G.,andPavoni,N.,Geology&HoloceneBreaksAlongtheSusitnaSegmentoftheMountainFault,Alaska",U.S.GeologicalSurveyMF-618,1974.L.andShapiro,L.,StructuralLineaments,SeismicityandGeologyTalkeetnaMountainsArea,Alaska,U.s.ArmyCorpsofEngineers,.L.,Siberling,N.J.,Csejtey,B.Jr.,Nelson,W.H.andBloome,IIAgeandStructuralSignificanceoftheChulitnaOphioliteandingRocks,SouthcentralAlaskall,U.S.GeologicalSurvey,ionalPaper1121-A,p21,1978.oorian,R.,IIGeologyoftheDevilCanyonDamsite,Alaskall,U.S.dicalSurvey,OpenFileReport74-40,p17,1974.rom,1.N.V.,IIQuaternaryGeologyoftheKenaiLowlandandGlacialoryoftheCookInletRegion,Alaska",U.S.GeologicalSurvey,essionalPaper443,p69,1964..L.,IIQuaternaryGeologyofAlaskall,U.S.GeologicalSurvey,ssionalPaper835,p145,1975. 13.Richter,D.H.andJones,D.l.,"StructuresandStratigraphyofAlaskaRange,Alaska",AmericanAssociationofPetroleumGeoloMemoir19,pp408-420,914.15.Smith,T.E.,"RegionalGeologyoftheSusitna-MaclarenRiverAreAlaskaDivisionofGeoloicalandGeophysicalSurvey,AnnualRepopp3 -6,974.16.SmithT.E.,Bundtzen,T.K.,andTrible,T.C.,IIStrataboundCoppeOccurrence,NorthernTalkeetnaMountainsll,AlaskaDivisionofGeolandGeophysicalSurveyOpenFileReport72,p ,1975.17.Turner,D.L.andSmith,T.E.,"GeochronologyandGeneralizedGeotheCenteralAlaskaRange,ClearwaterMountainsandNorthernTalMountainsll,~~~~~~!!...!~~~~~~~l...§;~~~~~~~~@1FileRon,nV'T18.U.S.ArmyCorpsHydroelectric19.20.Woodward-ClydeConsultants,~~;,.....;.;..;:;:,!:.,;:..;..,::..-...::..::.::...:..:.:.:..::....:.:.:t..,;;.~::":"'::'::":':"-':"'::""':''':'''::';~SeismicRefraction21.Woodward-ClydeConsultants:,~~~~~~~~o~n_S~e~i~s~m~i~c~S~t~u~d~ie~s::.....:.f~o~r...::..:~HydroelectricProject,13.Richter,D.H.andJones,D.l.,"StructuresandStratigraphyofAlaskaRange,Alaska",AmericanAssociationofPetroleumGeoloMemoir19,pp408-420,914.15.Smith,T.E.,"RegionalGeologyoftheSusitna-MaclarenRiverAreAlaskaDivisionofGeoloicalandGeophysicalSurvey,AnnualRepopp3 -6,974.16.SmithT.E.,Bundtzen,T.K.,andTrible,T.C.,IIStrataboundCoppeOccurrence,NorthernTalkeetnaMountainsll,AlaskaDivisionofGeolandGeophysicalSurveyOpenFileReport72,p ,1975.17.Turner,D.L.andSmith,T.E.,"GeochronologyandGeneralizedGeotheCenteralAlaskaRange,ClearwaterMountainsandNorthernTalMountainsll,~~~~~~!!...!~~~~~~~l...§;~~~~~~~~@1FileRon,nV'i"18.U.S.ArmyCorpsHydroelectric19.20.Woodward-ClydeConsultants,~~;,.....;.;..;:;:,!:.,;:..;..,::..-...::..::.::...:..:.:.:..::....:.:.:t..,;;.~::":"'::'::":':"-':"'::""':''':'''::';~SeismicRefraction21.Woodward-ClydeConsultants:,~~~~~~~~o~n_S~e~i~s~m~i~c~S~t~u~d~ie~s::.....:.f~o~r...::..:~HydroelectricProject, BlIOGRAPHYOFPREVIOUSINVESTIGATIONS'sionGeologicandGeophysical..Surveys,"RegionalGeologyoftheMaclarenRiverArea",AnnualReport,1973.fr.E.,IIPreliminaryGeochemistryandGeology,LittleFallsCreekJkeetnaMountainQuadranglell,AlaskaDivisionGeologicalandcalSurve,GeochemicalReort19,1969.E.,IIGeologyandGeochemistry,DianalakesArea,WesternMountainsll,AlaskaDivisionGeologicalandGeophysicalSurvey,4,1969.~.••.M.,IIpreliminaryGeologicMapoftheSoutheastQuadrantofU.S.GeologicalSurveyMiscellaneousFieldStudiesMapMF-612,~iM.,Holloway,D.D.,andMacKerett,E.M.,Jr.,"GeneralizedMapoftheEasternPartofSouthernAlaskall,U.S.GeologicaloenFileMa77-169-B,1977.M.,PreliminaryGeologicMapofAlaska,U.S.Geologicalsheets),1978.Jones,D.L.,andRichter,D.H.,IIGravina-NutzotinBelt-gnificanceofanUpperMesozoicSedimentaryandVolcanicnSouthernandSoutheasternAlaskall,U.S.GeologicalSurvey,Paer800-0,1972.A.,"AWinterEnvironmentalDataSurveyoftheDrainageoftheitnaRiver,Alaskall,CRRElInternalReport332(unpublished),R.,"TheSouthernAlaskaRangell,U.S.GeologicalSurvey,862,1935.R.,IIGeologyoftheAlaskaRailroadRegion",U.S.GeologicalBulletin907,1940..,"TheNelchina-SusitnaRegion,Alaska",U.S.GeologicalBUlletin668,1918.L.,Clark,S.H.,andHawley,C.C.,IISignificanceofUppericOceanicCrustintheUpperChulitnaDistrict,WestcentralRangell,U.S.GeologicalSurvey,ProfessionalPaper800-C,1972.H.,"MetallicMineralResourcesMapoftheTalkeetnaMountainsngle,Alaskall,U.S.GeologicalSurveyMiscellaneousFieldStudies370,1972.BlIOGRAPHYOFPREVIOUSINVESTIGATIONS'sionGeologicandGeophysical..Surveys,"RegionalGeologyoftheMaclarenRiverArea",AnnualReport,1973.fr.E.,IIPreliminaryGeochemistryandGeology,LittleFallsCreekJkeetnaMountainQuadranglell,AlaskaDivisionGeologicalandcalSurve,GeochemicalReort19,1969.E.,IIGeologyandGeochemistry,DianalakesArea,WesternMountainsll,AlaskaDivisionGeologicalandGeophysicalSurvey,4,1969.~.••.M.,IIpreliminaryGeologicMapoftheSoutheastQuadrantofU.S.GeologicalSurveyMiscellaneousFieldStudiesMapMF-612,~iM.,Holloway,D.D.,andMacKerett,E.M.,Jr.,"GeneralizedMapoftheEasternPartofSouthernAlaskall,U.S.GeologicaloenFileMa77-169-B,1977.M.,PreliminaryGeologicMapofAlaska,U.S.Geologicalsheets),1978.Jones,D.L.,andRichter,D.H.,IIGravina-NutzotinBelt-gnificanceofanUpperMesozoicSedimentaryandVolcanicnSouthernandSoutheasternAlaskall,U.S.GeologicalSurvey,Paer800-0,1972.A.,"AWinterEnvironmentalDataSurveyoftheDrainageoftheitnaRiver,Alaskall,CRRElInternalReport332(unpublished),R.,"TheSouthernAlaskaRangell,U.S.GeologicalSurvey,862,1935.R.,IIGeologyoftheAlaskaRailroadRegion",U.S.GeologicalBulletin907,1940..,"TheNelchina-SusitnaRegion,Alaska",U.S.GeologicalBulletin668,1918.L.,Clark,S.H.,andHawley,C.C.,IISignificanceofUppericOceanicCrustintheUpperChulitnaDistrict,WestcentralRangell,U.S.GeologicalSurvey,ProfessionalPaper800-C,1972.H.,"MetallicMineralResourcesMapoftheTalkeetnaMountainsngle,Alaskall,U.S.GeologicalSurveyMiscellaneousFieldStudies370,1972. VolcanicAtVol4,No.:DACW85-76-C-0004,1975.Csejtey,B.,Jr.,eta.l.,IIReconhaissanceGeologicMapandGeochrono19:~~TalkeetnaMountainQuadrangle,NorthernPartofAnchorageQuadrangl~Y~andSouthwestCornerofHealyQuadrangle,Alaskall,U.S.Geological/+$uOpenFileReport78-558A,1978.Csejtey,B.,Jr.,"TheDenaliFaultofSouthernAlaska:TheCasefor~:~RatherthanMajorDisplacementll,TransactionsAmericanGeophysicalUwVol61,No.46.Collins,S.G.,andField,W.O.,"GlaciersoftheTalkeetnaMountaiAlaskall,MountainGlaciersoftheNorthernHemisphere.Vol2:AlandAdjacentCanada,NorthAtlanticIslands,CRRELReport,1975.~Coulter,H.W.,Hopkins,D.M.,Karlstrom,T.N.V.,Pewe,T.L.,Wahrhaftig,C.,andWilliams,J.R.,"ExtentofGlaciationsinAlaU.S.GeologicalSurveyMiscellaneousGeologicalInvestigationMa~1-415,1965.Csejtey,B.,Jr.,"ReconnaissanceGeologicInvestigationsintheTalkMountains,Alaskall,U.S.GeologicalSurvey,OpenFileReport74-14~'1974.Csejtey,B.,Jr.,IITectonicImplicationsofaLatePaleozoicintheTalkeetnaMountains,SouthcentralAlaska",Geology,1976.cs:~~e~~l:~te~r~~n~~~t~~~~~~;o~~~i~e~:~~~~o;~~~~~~~~~~~~~gM~~~~~~~~~~Quadrangle,Alaska,U.S.GeologicalSurvey,OpenFileReport78-558~a1978.cs~~;~~~,BM:~~:\~~~~~~~,WM.HA:,J~~~~h,Dj .\;:,s~~~r~i~5~~~n~.M.D~~~'IIReconnaissanceGeologicMapandGeochronology,TalkeetnaMountainsQ~~NorthernPartofAnchorageQuadrangleandSouthwestCornerofHealy~~Quadrangle,Alaska,U.S.GeologicalSurvey,OpenFileReport78-558?ADavies,J.,andBerg,E.,IICrustalMorphologyandPlateTectonicsinAlaskall,BulletinoftheSeismologicalSocietyofAmerica,Vol63,Csejtey,B.,Jr.,Nelson,W.H.,Lamphere,M.A.,andTurner,D.L.,TrondhjemiteintheTalkeetnaMountains,SouthcentralAlaska,U.S.GeologicalSurveyProfessionalPaper1150,1979.Csejtey,B.,Jr.,Foster,H.L.,andNoklegerg,W.J.,IICretaceousAcc~~~oftheTalkeetnaSuperterraneandSubsequentDevel:opmentoftheDenal+~,inSouthcentralandEasternAlaskall,GeologicalSocietyofAmerica,A~withPrograms,1980.DamesandMoore,Inc.,SubsurfaceGeohDamsiteontheSusitn'::'a'::'R::":,:;";·v::';'e-r";;;",'::"A~l"":a~s+k..o.;..a'-"r.~";;';";;"-:-=,.;.L-i-'::";"'~~--;;---'-...:;.L;..~~::-::-.:iVolcanicAtVol4,No.:DACW85-76-C-0004,1975.Csejtey,B.,Jr.,eta.l.,IIReconhaissanceGeologicMapandGeochrono19:~~TalkeetnaMountainQuadrangle,NorthernPartofAnchorageQuadrangl~Y~andSouthwestCornerofHealyQuadrangle,Alaskall,U.S.Geological/+$uOpenFileReport78-558A,1978.Csejtey,B.,Jr.,"TheDenaliFaultofSouthernAlaska:TheCasefor~:~RatherthanMajorDisplacementll,TransactionsAmericanGeophysicalUwVol61,No.46.Collins,S.G.,andField,W.O.,"GlaciersoftheTalkeetnaMountaiAlaskall,MountainGlaciersoftheNorthernHemisphere.Vol2:AlandAdjacentCanada,NorthAtlanticIslands,CRRELReport,1975.~Coulter,H.W.,Hopkins,D.M.,Karlstrom,T.N.V.,Pewe,T.L.,Wahrhaftig,C.,andWilliams,J.R.,"ExtentofGlaciationsinAlaU.S.GeologicalSurveyMiscellaneousGeologicalInvestigationMa~1-415,1965.Csejtey,B.,Jr.,"ReconnaissanceGeologicInvestigationsintheTalkMountains,Alaskall,U.S.GeologicalSurvey,OpenFileReport74-14~'1974.Csejtey,B.,Jr.,IITectonicImplicationsofaLatePaleozoicintheTalkeetnaMountains,SouthcentralAlaska",Geology,1976.cs:~~e~~l:~te~r~~n~~~t~~~~~~;o~~~i~e~:~~~~o;~~~~~~~~~~~~~gM~~~~~~~~~~Quadrangle,Alaska,U.S.GeologicalSurvey,OpenFileReport78-558~a1978.cs~~;~~~,BM:~~:\~~~~~~~,WM.HA:,J~~~~h,Dj .\;:,s~~~r~i~5~~~n~.M.D~~~'IIReconnaissanceGeologicMapandGeochronology,TalkeetnaMountainsQ~~NorthernPartofAnchorageQuadrangleandSouthwestCornerofHealy~~Quadrangle,Alaska,U.S.GeologicalSurvey,OpenFileReport78-558?ADavies,J.,andBerg,E.,IICrustalMorphologyandPlateTectonicsinAlaskall,BulletinoftheSeismologicalSocietyofAmerica,Vol63,Csejtey,B.,Jr.,Nelson,W.H.,Lamphere,M.A.,andTurner,D.L.,TrondhjemiteintheTalkeetnaMountains,SouthcentralAlaska,U.S.GeologicalSurveyProfessionalPaper1150,1979.Csejtey,B.,Jr.,Foster,H.L.,andNoklegerg,W.J.,IICretaceousAcc~~~oftheTalkeetnaSuperterraneandSubsequentDevel:opmentoftheDenal+~,inSouthcentralandEasternAlaskall,GeologicalSocietyofAmerica,A~withPrograms,1980.DamesandMoore,Inc.,SubsurfaceGeohDamsiteontheSusitn'::'a'::'R::":,:;";·v::';'e-r";;;",'::"A~l"":a~s+k..o.;..a'-"r.~";;';";;"-:-=,.;.L-i-'::";"'~~--;;---'-...:;.L;..~~::-::-.:i ;R.l.,Plafker,G.,Hudson,T.,Tysdal,R.G.,andPavoni,N.,eGeologyandHoloceneBreaksAlongtheSusitnaSegmentoftheMountainFault,Alaskau,U.S.GeologicalSurveyMis.cellaneoustudiesMaMF-618,1974..;R.L.,Plafker,G.,andTysdal,R.G.,"GeologyandSurface5AlongPartoftheTalkeetnaSegmentoftheCastleMountain-.FaultSystem,Alaska",U.S.GeologicalSurveyMiscellaneousFieldMaMF-738,1976.~••••<A.,"TraceFossilEvidenceforDeepWaterSedimentationineousArc-trenchGap,SouthcentralAlaska"(abs),AmericanAssociationf'()leumGeoloistsBulletin,Vol63,No.3,1979.O.J.,J.r.,Kachadoorian,R.,andGreene,G.W.,"permafrostandEngineeringProblemsinAlaska",U.S.GeologicalSurveyProfessional678,1969...J.,"Water-ResourcesReconnaissanceofaPartoftheMatanuskaBorough,Alaska",U.S.GeologicalSurveyHydrologicInvestigationsHA-364,1971.R.B.,Smtth,T.E.,andTurner,T.L.,IIComparativePetrologyandture oftheMaclaren,RubyRangeandCoastRangeBelts:ImplicationsffsetAlongtheDenaliFaultSystemll(abs.),GeologicalSoCietyof~~aCordilleranSection,1974..,"TertiaryTectonicHistoryoftheCastleMountain-CaribouFaultintheTalkeetnaMountains,Alaska",GeologicalSocietyofAmerican,Prorams,Vol11,No.7,1979..W.,Merry,C.J.,McKim,H.L.,andLawson,D.E.,"EnvironmentaloftheUpperSusitnaRiverBasinUsingLandsatImagery",CRREL80-4,1980•.andShapiro,L.,·StructuralLineaments,Seismicity,andGeologyofalkeetnaMountainsArea,Alaska,GeophysicalInstitute,Universityof,1975.L.andVanWormer,J.D.,IISomeAspectsofActiveTectonisminAlaskaenonERTS-l(EarthResourcesTechnologySatellite-I)Imagery",U.S.nalAeronauticsandSaceAdministrationSecialPublication327,1973.,N.B.,LateTertiaryFaultsinSouthcentralAlaska,MastersThesis,fordUniversity,1977.,R.K.,Tuinstra,R.L.,andSlaugheter,C.W.,"ALandsatDataectionPlatformatDevilCanyonSite,UpperSusitnaBasin,Alaska",l SecialReort79-2,ADA068508,1979.;R.l.,Plafker,G.,Hudson,T.,Tysdal,R.G.,andPavoni,N.,eGeologyandHoloceneBreaksAlongtheSusitnaSegmentoftheMountainFault,Alaskau,U.S.GeologicalSurveyMis.cellaneoustudiesMaMF-618,1974..;R.L.,Plafker,G.,andTysdal,R.G.,"GeologyandSurface5AlongPartoftheTalkeetnaSegmentoftheCastleMountain-.FaultSystem,Alaska",U.S.GeologicalSurveyMiscellaneousFieldMaMF-738,1976.~••••<A.,"TraceFossilEvidenceforDeepWaterSedimentationineousArc-trenchGap,SouthcentralAlaska"(abs),AmericanAssociationf'()leumGeoloistsBulletin,Vol63,No.3,1979.O.J.,J.r.,Kachadoorian,R.,andGreene,G.W.,"permafrostandEngineeringProblemsinAlaska",U.S.GeologicalSurveyProfessional678,1969...J.,"Water-ResourcesReconnaissanceofaPartoftheMatanuskaBorough,Alaska",U.S.GeologicalSurveyHydrologicInvestigationsHA-364,1971.R.B.,Smtth,T.E.,andTurner,T.L.,IIComparativePetrologyandtureoftheMaclaren,RubyRangeandCoastRangeBelts:ImplicationsffsetAlongtheDenaliFaultSystemll(abs.),GeologicalSoCietyof~~aCordilleranSection,1974..,"TertiaryTectonicHistoryoftheCastleMountain-CaribouFaultintheTalkeetnaMountains,Alaska",GeologicalSocietyofAmerican,Prorams,Vol11,No.7,1979..W.,Merry,C.J.,McKim,H.L.,andLawson,D.E.,"EnvironmentaloftheUpperSusitnaRiverBasinUsingLandsatImagery",CRREL80-4,1980•.andShapiro,L.,·StructuralLineaments,Seismicity,andGeologyofalkeetnaMountainsArea,Alaska,GeophysicalInstitute,Universityof,1975.L.andVanWormer,J.D.,IISomeAspectsofActiveTectonisminAlaskaenonERTS-l(EarthResourcesTechnologySatellite-I)Imagery",U.S.nalAeronauticsandSaceAdministrationSecialPublication327,1973.,N.B.,LateTertiaryFaultsinSouthcentralAlaska,MastersThesis,fordUniversity,1977.,R.K.,Tuinstra,R.L.,andSlaugheter,C.W.,"ALandsatDataectionPlatformatDevilCanyonSite,UpperSusitnaBasin,Alaska",l SecialReort79-2,ADA068508,1979. Jasper,M.W.,"GeochemicalInvestigationsAlongSouthcentralAlaska",AlaskaDivisionofMinesReport7,1966.Kachadoorian,R.,Hopkins,D.,andNichols,D.,"preliminaryReportof'l~gFactorsAffectingHighwayConstructionintheAreaBetweentheSusitn~MaclarenRivers,Alaska",U.S.GeologicalSurvey,OpenFileReport§t!1954.GeologyoftheSouthernH;'S.GeologicalSurvey,OpenKachadoorian,R.,andPewe,T.,"EngineeringtheMt.HayesA-5Quandrangle,Alaska",U.Report55-78,1955.Jones,D.L.,Silberling,N.J.,Csejtey,B.,Jr.,Nelson,W.H.,andJill1C.D.,"AgeandStructuralSignificanceofOphioliteandAdjoiningRg,qtheUpperChulitnaDistrict,SouthcentralAlaska",U.S.GeologicalJSQProfessionalPaper1l21-A,1980.--Kachadoorian,R.,"GeologyoftheDevilCanyonDamsite,Alaska",U.S.5~Survey,OpenFileReport74-40,1974.Kachadoorian,R.,andMoore,H.J.,"ReconnaissanceoftheRecentGeol()~theProposedDevilCanyonandWatanaDamsites,SusitnaRiver,Alaska1fi;ExhibitD-2,U.S.ArmyCorpsofEngineersReport,1978.Karlson,R.C.,Curtin;G.C.,Codey,E.F.,andGormezy,L.,"Geochemi,GofSelectedElementsandResultsofSpectrographic'AnalysesforHeavyMineralConcentratesfromtheWesternHalfoftheTalkeetnaMountainsAlaska",U.S.GeologicalSurvey,OpenFileReport77-530,1977.Karlstrom,T.N.V.,"QuaternaryGeologyoftheKenailowlandsandGlacjHistoryoftheCookInletRegion,Alaskal',U.S.GeologicalSurvey,ProfessionalPaper443,1964.Karlstrom,T.N.V.,etal.,IISurficialGeologyofAlaskall,U.S.GeologSurvey,MiscellaneousGeologicalInvestigationMapI-357,1964Kaufman,M.A.,IIGeologyandMineralDepositsoftheDenali-MaclarenRi~.Areall,AlaskaDivisionGeologicalandGeophysicalSurvey,Report4,19Krinitzsky,E.l.,EarthguakeAssessmentintheSusitnaProject,Alaska;ArmyWaterwaysExperimentStation,1978.lahr,J.C.andKachadoorian,R.,PreliminaryGeologicandSeismicEval~oftheProposedDevilCanyonandWatanaReservoirAreas,SusitnaRive]Alaska,InformalReporttotheU.S.ArmyCorpsofEngineers,1975.lahr,J.C.,DetailedSeismicInvestigationofPacific-NorthAmerican~InteractioninSouthernAlaska,PhDDissertation,ColumbiaUniversity,1975.Jasper,M.W.,"GeochemicalInvestigationsAlongSouthcentralAlaska",AlaskaDivisionofMinesReport7,1966.Kachadoorian,R.,Hopkins,D.,andNichols,D.,"preliminaryReportof'l~gFactorsAffectingHighwayConstructionintheAreaBetweentheSusitn~MaclarenRivers,Alaska",U.S.GeologicalSurvey,OpenFileReport§t!1954.GeologyoftheSouthernH;'S.GeologicalSurvey,OpenKachadoorian,R.,andPewe,T.,"EngineeringtheMt.HayesA-5Quandrangle,Alaska",U.Report55-78,1955.Jones,D.L.,Silberling,N.J.,Csejtey,B.,Jr.,Nelson,W.H.,andJill1C.D.,"AgeandStructuralSignificanceofOphioliteandAdjoiningRg,qtheUpperChulitnaDistrict,SouthcentralAlaska",U.S.GeologicalJSQProfessionalPaper1l21-A,1980.--Kachadoorian,R.,"GeologyoftheDevilCanyonDamsite,Alaska",U.S.5~Survey,OpenFileReport74-40,1974.Kachadoorian,R.,andMoore,H.J.,"ReconnaissanceoftheRecentGeol()~theProposedDevilCanyonandWatanaDamsites,SusitnaRiver,Alaska1fi;ExhibitD-2,U.S.ArmyCorpsofEngineersReport,1978.Karlson,R.C.,Curtin;G.C.,Codey,E.F.,andGormezy,L.,"Geochemi,GofSelectedElementsandResultsofSpectrographic'AnalysesforHeavyMineralConcentratesfromtheWesternHalfoftheTalkeetnaMountainsAlaska",U.S.GeologicalSurvey,OpenFileReport77-530,1977.Karlstrom,T.N.V.,"QuaternaryGeologyoftheKenailowlandsandGlacjHistoryoftheCookInletRegion,Alaskal',U.S.GeologicalSurvey,ProfessionalPaper443,1964.Karlstrom,T.N.V.,etal.,IISurficialGeologyofAlaskall,U.S.GeologSurvey,MiscellaneousGeologicalInvestigationMapI-357,1964Kaufman,M.A.,IIGeologyandMineralDepositsoftheDenali-MaclarenRi~.Areall,AlaskaDivisionGeologicalandGeophysicalSurvey,Report4,19Krinitzsky,E.l.,EarthguakeAssessmentintheSusitnaProject,Alaska;ArmyWaterwaysExperimentStation,1978.lahr,J.C.andKachadoorian,R.,PreliminaryGeologicandSeismicEval~oftheProposedDevilCanyonandWatanaReservoirAreas,SusitnaRive]Alaska,InformalReporttotheU.S.ArmyCorpsofEngineers,1975.lahr,J.C.,DetailedSeismicInvestigationofPacific-NorthAmerican~InteractioninSouthernAlaska,PhDDissertation,ColumbiaUniversity,1975. .,andAlbert,M.R.,"SignificanceofSpaceImageLinearsinFirstInternationalConferenceofNewBasementTectonics,SaltLakeCity,Utah,1974",UtahGeologicalAssociation,on5,1976..H.,andReynolds,R.G.H.,apreliminarySpaceImageLineamentaska",U.S.GeologicalSurvey,OpenFileReport76-341,1976.L.,andHenning,M.W.,"ReconnaissanceGeology--SouthcentralaMountains,Alaska",AlaskaDivisionofGeologicalandi~alSurves,OpenFileReport103,1977.M.,Belon,A.L,Gedney,L.D.,andShapiro,L.H.,"ALookResourceswithLandsatData",InternationalSymposiumonRemotetheEnvironment,Proceedins10,Vol2,1975••J.,Cooley,E.F.,O'Leary,R.M.,Gormezy,L.,Csejtey,B.,Jr.,T.E.,andCleveland,M.N.,"AnalysesofGeochemicalSamplesfromkeetnaMountainsQuadrangle,Alaska",U.S.GeologicalSurvey,leReort78-1052,1978..•J.,Curtin,G.C~,andCsejtey,B.,Jr.,"MapShowingGeochemicalutionandAbundanceofSelectedElementsinStreamSedimentsand'neralConcentrates,TalkeetnaMountainsQuadrangle,Alaska",010icalSurve, 0enFileReort78-558,E,F,G,H,I,J,K,L,1978.H.,"HeadwaterRegionsofGulkanaandSusitnaRivers,Alaska",oicalSurve,Bulletin498,1912.s.W.,andReed,B.L.,"SurficialGeologicMapoftheTalkeetnaangle,Alaskall,U.S.GeologicalSurvey,MiscellaneousFieldStudiesJ,1978..(Ed.),"INQUAConference:GuidebooktoCentralandSouthcentralVIICongressoftheInternationalAssociationforQuaternary,1965.U.S.GeologicalSu.rvey,.,"DisseminatedTinOccurrencesNearCoalCreek,Talkeetnains0-6Quadrangle,.Alaska",U.S.GeologicalSurvey,OpenFile78-77,1978.L.,andNelson,S.W.,"GeologicMapoftheTalkeetnaQuadrangle,,U.S.GeologicalSurvey,MiscellaneousFieldStudiesMapMF-870-A,.D.,"ReconnaissanceGeologyoftheTalkeetna-KashwitnaArea,RiverBasin,Alaska",AlaskaDivisionofGeologicalandGeophysicals,0enFileReort107A,1978..,andAlbert,M.R.,"SignificanceofSpaceImageLinearsinFirstInternationalConferenceofNewBasementTectonics,SaltLakeCity,Utah,1974",UtahGeologicalAssociation,on5,1976..H.,andReynolds,R.G.H.,apreliminarySpaceImageLineamentaska",U.S.GeologicalSurvey,OpenFileReport76-341,1976.L.,andHenning,M.W.,"ReconnaissanceGeology--SouthcentralaMountains,Alaska",AlaskaDivisionofGeologicalandi~alSurves,OpenFileReport103,1977.M.,Belon,A.L,Gedney,L.D.,andShapiro,L.H.,"ALookResourceswithLandsatData",InternationalSymposiumonRemotetheEnvironment,Proceedins10,Vol2,1975••J.,Cooley,E.F.,O'Leary,R.M.,Gormezy,L.,Csejtey,B.,Jr.,T.E.,andCleveland,M.N.,"AnalysesofGeochemicalSamplesfromkeetnaMountainsQuadrangle,Alaska",U.S.GeologicalSurvey,leReort78-1052,1978..•J.,Curtin,G.C~,andCsejtey,B.,Jr.,"MapShowingGeochemicalutionandAbundanceofSelectedElementsinStreamSedimentsand'neralConcentrates,TalkeetnaMountainsQuadrangle,Alaska",010icalSurve, 0enFileReort78-558,E,F,G,H,I,J,K,L,1978.H.,"HeadwaterRegionsofGulkanaandSusitnaRivers,Alaska",oicalSurve,Bulletin498,1912.s.W.,andReed,B.L.,"SurficialGeologicMapoftheTalkeetnaangle,Alaskall,U.S.GeologicalSurvey,MiscellaneousFieldStudiesJ,1978..(Ed.),"INQUAConference:GuidebooktoCentralandSouthcentralVIICongressoftheInternationalAssociationforQuaternary,1965.U.S.GeologicalSu.rvey,.,"DisseminatedTinOccurrencesNearCoalCreek,Talkeetnains0-6Quadrangle,.Alaska",U.S.GeologicalSurvey,OpenFile78-77,1978.L.,andNelson,S.W.,"GeologicMapoftheTalkeetnaQuadrangle,,U.S.GeologicalSurvey,MiscellaneousFieldStudiesMapMF-870-A,.D.,"ReconnaissanceGeologyoftheTalkeetna-KashwitnaArea,RiverBasin,Alaska",AlaskaDivisionofGeologicalandGeophysicals,0enFileReort107A,1978. Richter,D.H.,andJones,D.l.,"TheStructureandStratigraphy0AlaskaRange,Alaska",AmericanAssociationPetroleumGeoloists1973.Smith,T.E.,andlamphere,M.A.,"AgeoftheSedimentation,PlutoniRegionalMetamorphismintheClearwaterMountainsRegionofCentralIsochron/West,No.2,1971.Richter,D.H.,"GeologyofthePortageCreek-SusitnaRiverAreaAlaskaDivisionofGeologicalandGeophysicalSurveysReport3,1Richter,D.H.,andMason,N.A.,Jr.,"QuaternaryFaultingintheAlaskaRange",GeologicalSocietyofAmericaBulletin,Vol82,197Rieger,S.,Schoephorster,D.B.,andFurbush,C.E.,"ExploratorySSurveyofAlaska",SoilConservationServiceReport,1979.Rose,A.W.,"GeologyofanAreaontheUpperTalkeetnaRiver,TalkeMountainsQuadrangle",AlaskaDivisionofGeoloicalandGeohsicSurveys,Report32,1967.Sayles,F.H.,"ProcedureforEstimatingBoreholeSpacingandThaw-wPumpingRequirementsforArtificallyThawingtheBedrockPermafrostheWatanaDamsite",U.S.ArmyCorpsofEngineersReport(CRREl),ShannonandWilsonInc.,SeismicRefractionSurveProject,WatanaandDevilCanyonDamsites,1978.Silberling,N.J.,Jones,D.l.,Csejtey,B.,Jr.,andNelson,W.H"InterpretiveBedrockGeologicMapofPartoftheUpperChulitna(HealyA-6)Alaska1t,U.S.GeoloicalSurve, 0enFileReottSmith,T.E.,Bundtzan,T.K.,andTrible,T.C.,"StrataboundCoppeOccurrence,NorthernTalkeetnaMountains,Alaska",AlaskaDivisionGeologicalandGeophysicalSurveys,MiscellaneousPaper3,1975.Smith,T.E.,andTurner,D.L.,"MaclarenMetamorphicBeltofCentrAlaska",GeologicalSocietyofAmerica(abs.),CordilleranSectionNo.3,1974.Steele,W.C.,andleCompte,J.R.,"MapShowingInterpretationofLImageryoftheTalkeetnaMountainsQuadrangle,Alaska",U.S.GeolSurvey,OpenFileReport78-558-0,1978.TexasInstruments,Inc.,"AerialRadiometricandMagneticReconnaissSurveyoftheEagle-DillinghamArea,Alaska",ReortGJBX-113-7Turner,D.L.,Smith,T.E.,andForbes,R.B.,IIGeochronologyandOfAlongtheDenaliFaultSystem",Abstractswithrorams70thAnnualCordillerianSection,GeologicalSocietyofAmerica,Vol6,No.3,Richter,D.H.,andJones,D.l.,"TheStructureandStratigraphy0AlaskaRange,Alaska",AmericanAssociationPetroleumGeoloists1973.Smith,T.E.,andlamphere,M.A.,"AgeoftheSedimentation,PlutoniRegionalMetamorphismintheClearwaterMountainsRegionofCentralIsochron/West,No.2,1971.Richter,D.H.,"GeologyofthePortageCreek-SusitnaRiverAreaAlaskaDivisionofGeologicalandGeophysicalSurveysReport3,1Richter,D.H.,andMason,N.A.,Jr.,"QuaternaryFaultingintheAlaskaRange",GeologicalSocietyofAmericaBulletin,Vol82,197Rieger,S.,Schoephorster,D.B.,andFurbush,C.E.,"ExploratorySSurveyofAlaska",SoilConservationServiceReport,1979.Rose,A.W.,"GeologyofanAreaontheUpperTalkeetnaRiver,TalkeMountainsQuadrangle",AlaskaDivisionofGeoloicalandGeohsicSurveys,Report32,1967.Sayles,F.H.,"ProcedureforEstimatingBoreholeSpacingandThaw-wPumpingRequirementsforArtificallyThawingtheBedrockPermafrostheWatanaDamsite",U.S.ArmyCorpsofEngineersReport(CRREl),ShannonandWilsonInc.,SeismicRefractionSurveProject,WatanaandDevilCanyonDamsites,1978.Silberling,N.J.,Jones,D.l.,Csejtey,B.,Jr.,andNelson,W.H"InterpretiveBedrockGeologicMapofPartoftheUpperChulitna(HealyA-6)Alaska1t,U.S.GeoloicalSurve,0enFileReottSmith,T.E.,Bundtzan,T.K.,andTrible,T.C.,"StrataboundCoppeOccurrence,NorthernTalkeetnaMountains,Alaska",AlaskaDivisionGeologicalandGeophysicalSurveys,MiscellaneousPaper3,1975.Smith,T.E.,andTurner,D.L.,"MaclarenMetamorphicBeltofCentrAlaska",GeologicalSocietyofAmerica(abs.),CordilleranSectionNo.3,1974.Steele,W.C.,andleCompte,J.R.,"MapShowingInterpretationofLImageryoftheTalkeetnaMountainsQuadrangle,Alaska",U.S.GeolSurvey,OpenFileReport78-558-0,1978.TexasInstruments,Inc.,"AerialRadiometricandMagneticReconnaissSurveyoftheEagle-DillinghamArea,Alaska",ReortGJBX-113-7Turner,D.L.,Smith,T.E.,andForbes,R.B.,IIGeochronologyandOfAlongtheDenaliFaultSystem",Abstractswithrorams70thAnnualCordillerianSection,GeologicalSocietyofAmerica,Vol6,No.3, .,andSmith,T.E.,IIGeochronologyandGeneralizedGeologyAlaskaRange,ClearwaterMountains,andNorthernMountainsll~AlaskaDivisionofGeologicalandGeophysicalenFileReort72,1974.CorpsofEngineers,HydroelectricPowerandRelatedPurposes-UsitnaRiverBasin,Aendix,Part1,SectionD,1975and1978.auofReclamation,IIAReportonthePotentialDevelopmentofsourcesintheSusitnaRiverBasinofAlaskall,U.·S~Bureaumation,AlaskaDistrict,1953.auofReclamation,IIDevilCanyonProject,Alaska-FeasibilityU.S.BureauofReclamation,AlaskaDistrict,1960.auofReclamation,IIEngineeringGeologyReport,FeasibilityevilCanyonDam,DevilCanyonProjectll,AlaskaGeologicReport7,auofReclamation,IIEngineeringGeologyoftheVeeCanyonDamsite,YonProjectSusitnaRiver,Alaska",U.S.BureauofRecla~~tion,istrict,1962.auofReclamation,IILaboratoryTestsofFoundationRockCores.ilCanyonDamsite,DevilCanyonProject-AlaskaJl,ConcreterReortC-933,1978.C.,IIQuaternaryGeologyoftheNenanaRiverValleyandAdjacenttheAlaskaRangell,U.S.GeologicalSurvey,ProfessionalPaperC.,andBlack,R.F.,IIEngineeringGeologyAlongPartofthelroadll,U.S.GeologicalSurvey,ProfessionalPaper293-B,1958.Davies,J.,andGedney,L.,IISeismicityandPlateTectonicsAlaskall,BulletinoftheSeismologicalSocietyofAmerica,liTheSusitnaHydroelectricProjectll,NorthernEngineering,Vol8,,1976..,andSmith,T.E.,IIGeochronologyandGeneralizedGeologyAlaskaRange,ClearwaterMountains,andNorthernMountainsll~AlaskaDivisionofGeologicalandGeophysicalenFileReort72,1974.CorpsofEngineers,HydroelectricPowerandRelatedPurposes-UsitnaRiverBasin,Aendix,Part1,SectionD,1975and1978.auofReclamation,IIAReportonthePotentialDevelopmentofsourcesintheSusitnaRiverBasinofAlaskall,U.·S~Bureaumation,AlaskaDistrict,1953.auofReclamation,IIDevilCanyonProject,Alaska-FeasibilityU.S.BureauofReclamation,AlaskaDistrict,1960.auofReclamation,IIEngineeringGeologyReport,FeasibilityevilCanyonDam,DevilCanyonProjectll,AlaskaGeologicReport7,auofReclamation,IIEngineeringGeologyoftheVeeCanyonDamsite,YonProjectSusitnaRiver,Alaska",U.S.BureauofRecla~~tion,istrict,1962.auofReclamation,IILaboratoryTestsofFoundationRockCores.ilCanyonDamsite,DevilCanyonProject-AlaskaJl,ConcreterReortC-933,1978.C.,IIQuaternaryGeologyoftheNenanaRiverValleyandAdjacenttheAlaskaRangell,U.S.GeologicalSurvey,ProfessionalPaperC.,andBlack,R.F.,IIEngineeringGeologyAlongPartofthelroadll,U.S.GeologicalSurvey,ProfessionalPaper293-B,1958.Davies,J.,andGedney,L.,IISeismicityandPlateTectonicsAlaskall,BulletinoftheSeismologicalSocietyofAmerica,liTheSusitnaHydroelectricProjectll,NorthernEngineering,Vol8,,1976. APPENDIXB-1WATANAREPORTSAPPENDIXB-1WATANAREPORTS OJ.LENGTHCORE.OFREC.t(RQDJRun110010.0(50)to15.0Run29615.0(50)to20.0Run310020.0(66)to25.0Run410025.0(0)to25.5ELEVATIONS:DATUM·DRILLPLATFORM_-:-::-::-=--=-_GROUNDSURFACE_-::1:-::8:-::3"':'5....;f;:.;~t::.:.~_ROCKSURFACE1826.8ft.BOTTOMOFHOLE_-=i:..::::5=06,:;:..:..,:5::---f-":.t..:...__WATERTABLE1765ft.(7-28-80)hole.Soilcontainingfragmentsofgreenigneousrock,finetomediumgrainedwithsmallwhitecrystals.Gradesdownwardtoresidual,highlyweatheredbedrock.DESCRIPTION:16.7Gouge.Coreloss0.2'.0.0-10.0'Nosamplestaken.Greenishtodarkbluish-gray,finetomediumgrainedgroundmasswithwhiteplagioclasephenocrysts.Flowstructures.Veryhard.Freshtoslightlyweathered.Jointspacingveryclosetoclose.Jointandfracturesurfacesrough,withIron-oxidestaining,oftenthinclay.coatings.Disseminatedsulfidesthroughout.THEDRILLINGCOMPANYHOLENO.BH-2SHEETNO._l_OF-ll.(ACRES)052504(RaM)July1419~80~_July27198",,0,,--_SOILCASINGADVANCERCASINGDIAM._NW;.;..;.;._(~3:..:..-=:5_II...:O:::,.:.:..:D:;..:;'..!..)_ROCK__D-'IAM..;:;.;;.:O:..;.N;.:;:.D--"'-CO..:;;.;R:.;..'E;;;.....;;;D;.:;:.R=I=LL=-COREDIAM.NO- 3(1.7511)LATITUDEN62049'33.281"DEPARTUREW148033'9.15711BEARING450INITIALDIP__5_5_°_OTHERDIPS_STARTED11:30p.M.____________.FINISHED4:00PM.ACRESAMERICANINCORPORATED1-----r>...::......JCONSULTINGENGINEERS~~...~c:..~~~~l:T.e~!...!~!::BUFFALO,NEWYORKANCHOR:AGE•ALASKAdeothsareal0_R_a_h_a_i_m_-_H_a....:::g_e_n(RaM)APPROVED(RaM)SummarybyFeldmanDATEAPPROVED---------(ACRES)-------(ACRES)DATENGREPORTITNAHYDROELECTRICPRO..JECTALASKAPOWERAUTHORITYWATANANORTHABUTMENTJOBNO.P5701.05erburdenOJ.LENGTHCORE.OFREC.t(RQDJRun110010.0(50)to15.0Run29615.0(50)to20.0Run310020.0(66)to25.0Run410025.0(0)to25.5ELEVATIONS:DATUM·DRILLPLATFORM_-:-::-::-=--=-_GROUNDSURFACE_-::1:-::8:-::3"':'5....;f;:.;~t::.:.~_ROCKSURFACE1826.8ft.BOTTOMOFHOLE_-=i:..::::5=06,:;:..:..,:5::---f-":.t..:...__WATERTABLE1765ft.(7-28-80)hole.Soilcontainingfragmentsofgreenigneousrock,finetomediumgrainedwithsmallwhitecrystals.Gradesdownwardtoresidual,highlyweatheredbedrock.DESCRIPTION:16.7Gouge.Coreloss0.2'.0.0-10.0'Nosamplestaken.Greenishtodarkbluish-gray,finetomediumgrainedgroundmasswithwhiteplagioclasephenocrysts.Flowstructures.Veryhard.Freshtoslightlyweathered.Jointspacingveryclosetoclose.Jointandfracturesurfacesrough,withIron-oxidestaining,oftenthinclay.coatings.Disseminatedsulfidesthroughout.THEDRILLINGCOMPANYHOLENO.BH-2SHEETNO._l_OF-ll.(ACRES)052504(RaM)July1419~80~_July27198",,0,,--_SOILCASINGADVANCERCASINGDIAM._NW;.;..;.;._(~3:..:..-=:5_II...:O:::,.:.:..:D:;..:;'..!..)_ROCK__D-'IAM..;:;.;;.:O:..;.N;.:;:.D--"'-CO..:;;.;R:.;..'E;;;.....;;;D;.:;:.R=I=LL=-COREDIAM.NO- 3(1.7511)LATITUDEN62049'33.281"DEPARTUREW148033'9.15711BEARING450INITIALDIP__5_5_°_OTHERDIPS_STARTED11:30p.M.____________.FINISHED4:00PM.ACRESAMERICANINCORPORATED1-----r>...::......JCONSULTINGENGINEERS~~...~c:..~~~~l:T.e~!...!~!::BUFFALO,NEWYORKANCHOR:AGE•ALASKAdeothsareal0_R_a_h_a_i_m_-_H_a....:::g_e_n{RaM)APPROVED{RaM)SummarybyFeldmanDATEAPPROVED---------(ACRES)-------(ACRES)DATENGREPORTITNAHYDROELECTRICPRO..JECTALASKAPOWERAUTHORITYWATANANORTHABUTMENTJOBNO.P5701.05erburden 66.9R1050.5to55.7Rll55.7to60.8R 735.5to40.R 630.5to35.5HOLENO.BH-SHEETNO.-2-(ACRES)ANCHORAGE,ALASKA29. 6Fracturewithclay.(55.7-60.8)Coreloss0.7'.OESCRIPTION:ROCKTYPE40.5-60.8Maficandultramaficinclusions.R 8Calcitecoatingscommononfracturesurfaces.40.5to45.7R1363.7to66.960.8-71.2Incompetent,highlyfractured.ManyR12fractureshealedwithcarbonate.60.8to(62.2)Faintslickensides.63.7R 945.7to50.525.5Andesite.(contId)•ACRESAMERICANINCORPORATEDAPDIOCONSULTINGENGINEERSundBUFFALOINEWYORKDRILLINGREPDRTSUSITNAHVDRCELECTRICPRC..JECTforALASKAPCWERAUTHCRITVSITEWATANANORTHABUTMENTJOBNO.P570L05DEPTH66.9R1050.5to55.7Rll55.7to60.8R 735.5to40.R 630.5to35.5HOLENO.BH-SHEETNO.-2-(ACRES)ANCHORAGE,ALASKA29. 6Fracturewithclay.(55.7-60.8)Coreloss0.7'.OESCRIPTION:ROCKTYPE40.5-60.8Maficandultramaficinclusions.R 8Calcitecoatingscommononfracturesurfaces.40.5to45.7R1363.7to66.960.8-71.2Incompetent,highlyfractured.ManyR12fractureshealedwithcarbonate.60.8to(62.2)Faintslickensides.63.7R 945.7to50.525.5Andesite.(contId)•ACRESAMERICANINCORPORATEDAPDIOCONSULTINGENGINEERSundBUFFALOINEWYORKDRILLINGREPDRTSUSITNAHVDRCELECTRICPRC..JECTforALASKAPCWERAUTHCRITVSITEWATANANORTHABUTMENTJOBNO.P570L05DEPTH 26(0)100(71)75(0)R2081.0to84.5R2210085.0(77)to90.2R196677.5(46)to81.0R2110084.5.(0)to85.0R183575.5(0)to77.5R1772.0to75.5R1671.2to72.0R1511368.9(73)to71.2R1410066.9(50)to68.9L.~Fco'ffE.REC.RUN(RQD)coreHoleCoreHOLENO.BH-2SHEETNO._3_0F.J1..(ACRES)052504(RaM)81.097.8Highlyfracturedthroughout,moderatelyhardtosoftandfriablelocally,moderatelytoslightlyweathered,morecompetentthanrockabove.71.2-72.0Altered.Clayzone.71.2-81.0Highlyfracturedandsheared,loss4.7'.Highlyweatheredandaltered.caving,corebadlygroundduringdrilling.loss5.3'.DESCRIPTION:ACRESAMERICANINCORPORATEDI-------J"CONSULTINGENGINEERS~c:2.~T~~!.l.!~BUFFALOINEWYORKANCHORAGEtAL.ASKAGREPeRTAHVDROELECTRICPRo....eCTASKAPOWERAUTHORITV.ANANORTHABUTMENTJOBNO.P5701.as26(0)100(71)75(0)R2081.0to84.5R2210085.0(77)to90.2R196677.5(46)to81.0R2110084.5.(0)to85.0R183575.5(0)to77.5R1772.0to75.5R1671.2to72.0R1511368.9(73)to71.2R1410066.9(50)to68.9L.~Fco'ffE.REC.RUN(RQD)coreHoleCoreHOLENO.BH-2SHEETNO._3_0F.J1..(ACRES)052504(RaM)81.097.8Highlyfracturedthroughout,moderatelyhardtosoftandfriablelocally,moderatelytoslightlyweathered,morecompetentthanrockabove.71.2-72.0Altered.Clayzone.71.2-81.0Highlyfracturedandsheared,loss4.7'.Highlyweatheredandaltered.caving,corebadlygroundduringdrilling.loss5.3'.DESCRIPTION:ACRESAMERICANINCORPORATEDI-------J"CONSULTINGENGINEERS~c:2.~T~~!.l.!~BUFFALOINEWYORKANCHORAGEtAL.ASKAGREPeRTAHVDROELECTRICPRo....eCTASKAPOWERAUTHORITV.ANANORTHABUTMENTJOBNO.P5701.as DRILLINGREPeRTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEWATANANORTHABUTMENTJOBNO.P5701.057.2'.rockCorelossangular~~.!!!.'!.;T~~!1.!~ANCHORAGE,A~ASKAShearzone.gougewith97.8-121.0Highlyfracturedandsheared,coreloss8.4'.Zoneishighlyalteredandweatheredthroughout,moderatelyhardtosoftandfriable,claygougeandslickensidesthroughout.Permeatedbycarbonate.(92.0-95.0)Coreloss0.5'.(96.8)Slickensides(101.8-109.6)Calcareousclayfragments.(95.0)Brecciatedzonewithclayandcarbonate.Soft.DESCRIPTION:ROCKTYPE•. . .ACRESAMERICANINCORPORATEDIPDIOCONSULTINGENGINEERSlIundBUFFALOINEWYORKDEPTH(ft)90.2Andesite(cont'd)115.2DRILLINGREPeRTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEWATANANORTHABUTMENTJOBNO.P5701.057.2'.rockCorelossangular~~.!!!.'!.;T~~!1.!~ANCHORAGE,A~ASKAShearzone.gougewith97.8-121.0Highlyfracturedandsheared,coreloss8.4'.Zoneishighlyalteredandweatheredthroughout,moderatelyhardtosoftandfriable,claygougeandslickensidesthroughout.Permeatedbycarbonate.(92.0-95.0)Coreloss0.5'.(96.8)Slickensides(101.8-109.6)Calcareousclayfragments.(95.0)Brecciatedzonewithclayandcarbonate.Soft.DESCRIPTION:ROCKTYPE•...ACRESAMERICANINCORPORATEDIPDIOCONSULTINGENGINEERSlIundBUFFALOINEWYORKDEPTH(ft)90.2Andesite(cont'd)115.2 (123-128.4)Possibleshearzone.(141.9 -153.7)Shearzone,corelossgreaterthan3feet.121.0141.9'Highlyfracturedandshearedlocally.Morecompetentthanrockabove,slightlytomoderatelyweathered,withironstainingonjointsurfaces.R3280115.2(30)to118.2R3382118.2(54)to121.0R3489121.0(70)to125.7R35100125.7(30)to128.4R36100128.4(54)to131.0R3795131.0(0)to134.8R38100134.8(84)to139.8R39100139.8(0)to141.9R4080141.9(60)to144.4L~FC~E.REC.RUN(RQO)sheared,locally.highlyHOLENO.BH-2'SHEETNO..2.-0F-1d.(ACRES)052504(RaM)Lightgreentogray,finegrainedandesite(asdescribedabove)interlayeredwithlighttodarkgreen,finetomediumgraineddiorite(withhornblende,plagioclase,biotite,orthoclase).RocktypesalterI?-atethroughout.Locallycompetent,slightlyweathered.Veryclosejointspacing,numeroushealedfractures.Ironstainingonfracturesurfaces.Calcitepresentinjointsandfractures.141.9 167.9HighlyfracturedandmoderatelyhardtosoftandfriableGenerallyincompetent,slightlytoweathered,ironstainedthroughout.(118.2)Highlyoxidized.(131.0-134.8)Coreloss0.2'.DESCRIPTION:GREPeRTNAHYDROELECTRIC;:PRO.JECTASKAPOWERAUTHORITYANORTHABUTMENTJOBNO.P5701.05ACRESAMERICANINCORPORATED1-----JDr<....:::..JCONSULTINGENGINEERS~c:E!.!!!••!~~.r!\'!~BUFFALO,NEWYORKANCHORAGE•Al.ASKA(123-128.4)Possibleshearzone.(141.9 -153.7)Shearzone,corelossgreaterthan3feet.121.0141.9'Highlyfracturedandshearedlocally.Morecompetentthanrockabove,slightlytomoderatelyweathered,withironstainingonjointsurfaces.R3280115.2(30)to118.2R3382118.2(54)to121.0R3489121.0(70)to125.7R35100125.7(30)to128.4R36100128.4(54)to131.0R3795131.0(0)to134.8R38100134.8(84)to139.8R39100139.8(0)to141.9R4080141.9(60)to144.4L~FC~E.REC.RUN(RQO)sheared,locally.highlyHOLENO.BH-2'SHEETNO..2.-0F-1d.(ACRES)052504(RaM)Lightgreentogray,finegrainedandesite(asdescribedabove)interlayeredwithlighttodarkgreen,finetomediumgraineddiorite(withhornblende,plagioclase,biotite,orthoclase).RocktypesalterI?-atethroughout.Locallycompetent,slightlyweathered.Veryclosejointspacing,numeroushealedfractures.Ironstainingonfracturesurfaces.Calcitepresentinjointsandfractures.141.9 167.9HighlyfracturedandmoderatelyhardtosoftandfriableGenerallyincompetent,slightlytoweathered,ironstainedthroughout.(118.2)Highlyoxidized.(131.0-134.8)Coreloss0.2'.DESCRIPTION:GREPeRTNAHYDROELECTRIC;:PRO.JECTASKAPOWERAUTHORITYANORTHABUTMENTJOBNO.P5701.05ACRESAMERICANINCORPORATED1-----JDr<....:::..JCONSULTINGENGINEERS~c:E!.!!!••!~~.r!\'!~BUFFALO,NEWYORKANCHORAGE•Al.ASKA R45155.7to158.2R43151.0to153.7R44153.7to155.7R46158.2to160.2R48162.2to167.9R47160.2to162.2R49167.9to170.5ANCHORAGE,ALASKA(144.4148.0)Nocorerecovered.Triconedthroughcavedsection.Greenishgray,veryfinedtomediumgrainedwithporphyritictexture.Visiblecompositionalzoning.Moderatelyhardtosoft,moderatelycompetenttoweakandfriablelocally.Freshtoslightlyweatheredwithironstainingonjointsurfaces.Carbonatecommonthroughout.Jointspacingveryclosetowide.Numerousfracturescementedwithcalcite.160.2-167.9Coreloss0.4'.(148.0-151.0)Veryhardbutincompetent.Coreloss2.0'.(151.0-153.7)Highlyfracturedandweathered,with0.9'clayseam.Coreloss0.9'.DESCRIPTION:(155.7-158.2)Coreloss0.5'.167.9-170.5Abundantcalcitewithinfracturesandjoints.Rockbecomingmorecompetent.(158.2-159.5)Highlyfracturedandweathered.Extensiveoxidationwithinfractures.ROCKTYPEDiorite•ACRESAMERICANINCORPORATEDIPD[~CONSULTINGENGINEERSIIUn[dBUFFALOINEWYORKDRILLINGREPORTSUSITNAHVDROELECTRICPRC.JECTforALASKAPOWERAUTHORITVSITEWATANANORTHABUTMENTJOBNO.P5701.05151.0170.5DEPTH(ft)144.4Andesite-Diorite(cont'd)R45155.7to158.2R43151.0to153.7R44153.7to155.7R46158.2to160.2R48162.2to167.9R47160.2to162.2R49167.9to170.5ANCHORAGE,ALASKA(144.4148.0)Nocorerecovered.Triconedthroughcavedsection.Greenishgray,veryfinedtomediumgrainedwithporphyritictexture.Visiblecompositionalzoning.Moderatelyhardtosoft,moderatelycompetenttoweakandfriablelocally.Freshtoslightlyweatheredwithironstainingonjointsurfaces.Carbonatecommonthroughout.Jointspacingveryclosetowide.Numerousfracturescementedwithcalcite.160.2-167.9Coreloss0.4'.(148.0-151.0)Veryhardbutincompetent.Coreloss2.0'.(151.0-153.7)Highlyfracturedandweathered,with0.9'clayseam.Coreloss0.9'.DESCRIPTION:(155.7-158.2)Coreloss0.5'.167.9-170.5Abundantcalcitewithinfracturesandjoints.Rockbecomingmorecompetent.(158.2-159.5)Highlyfracturedandweathered.Extensiveoxidationwithinfractures.ROCKTYPEDiorite•ACRESAMERICANINCORPORATEDIPD[~CONSULTINGENGINEERSIIUn[dBUFFALOINEWYORKDRILLINGREPORTSUSITNAHVDROELECTRICPRC.JECTforALASKAPOWERAUTHORITVSITEWATANANORTHABUTMENTJOBNO.P5701.05151.0170.5DEPTH(ft)144.4Andesite-Diorite(cont'd) HOLENO.~B:::::H~-=:..2__SHEETNO._7_OF-ld..(ACRES)052504(RaM)175.8-177.0Sheared,incompetent,calcareous.90(87)R50100170.5(47)to175.8R51100175.8(0)to177.0R52177.0to181.0L~FCo'ffE.REC.RUN(RQO)R53100181.0100)to182.8R54100182.8100)to186.9R55100186.9100)to189.2R56100189.2100)to191.0R5789191.0(74)to196.4HighlyR5894196.4(48)to201.0Alterationzone.Coreloss0.3I •177.0-196.4Lightgreentolightblue-gray.Veryhard,competent,fresh.Jointspacingmoderatelyclosewithoccasionalcalcitefillings.11inorsulfidemineralizationthroughout.172.5-175.8Morecompetent.Finetomediumgrained,jointspacingmoderatelyclose.Numerousfractureshealedwithcalcite.170.5-172.5Altered.Coarsegrained,friable,highlyfracturedandsheared.Chloritized.196.4 197.4weathered,sheared.(177.0-181.0)Coreloss0.4'.(191-196.4)Coreloss0.7'.DESCRIPTION:REPORTHVDROELECTRICPRO..JECTSKAPOWERAUTHORITVNORTHABUTMENTJOBNO.P5701.05ESAMERICANINCORPORATEDI-------r'-=~SULTINGENGINEERS~~~~T~~.!!...!~FALOINEWYORKANCHORAGE,ALASKAHOLENO.~B:::::H~-=:..2__SHEETNO._7_OF-ld..(ACRES)052504(RaM)175.8-177.0Sheared,incompetent,calcareous.90(87)R50100170.5(47)to175.8R51100175.8(0)to177.0R52177.0to181.0L~FCo'ffE.REC.RUN(RQO)R53100181.0100)to182.8R54100182.8100)to186.9R55100186.9100)to189.2R56100189.2100)to191.0R5789191.0(74)to196.4HighlyR5894196.4(48)to201.0Alterationzone.Coreloss0.3I •177.0-196.4Lightgreentolightblue-gray.Veryhard,competent,fresh.Jointspacingmoderatelyclosewithoccasionalcalcitefillings.11inorsulfidemineralizationthroughout.172.5-175.8Morecompetent.Finetomediumgrained,jointspacingmoderatelyclose.Numerousfractureshealedwithcalcite.170.5-172.5Altered.Coarsegrained,friable,highlyfracturedandsheared.Chloritized.196.4 197.4weathered,sheared.(177.0-181.0)Coreloss0.4'.(191-196.4)Coreloss0.7'.DESCRIPTION:REPORTHVDROELECTRICPRO..JECTSKAPOWERAUTHORITVNORTHABUTMENTJOBNO.P5701.05ESAMERICANINCORPORATEDI-------r'-=~SULTINGENGINEERS~~~~T~~.!!...!~FALOINEWYORKANCHORAGE,ALASKA 237.7214.4-218.5Coreloss0.3'.HOLENO.SHEETNO.8(ACRES)0525040...!!.~~T~~.!~\.!~ANCHORAGE,A~ASKA205.0-205.3Highlyfractured.OESCRIPTION:ROCKTYPE223.7-228.7Mediumgrained.Jointspacingclose.Ironstainingandcalciteonfracturesurfaces.Coreloss0.2'.230.7-241.0Altered,bleached.Soft.Jointspacingclose,slightlytomoderatelyweathered.Penetrative(toapproximately1cm)ironstainingalongjoints.Sulfidemineralization.207.1-209.3Brecciated,healed.Coreloss0.4'.228.7-230.7Jointspacingmoderatelyclose,/rockmorecompetent.•ACRESAMERICANINCORPORATEDAPD(~CONSULTINGENGINEERSundBUFFALO,NEWYORKDRILLINGREPORTSUSITNAHVCRCELECTRICPRC.JECTforALASKAPCWERAUTHCRITVSITEWATANANORTHABUTMENTJOBNO.P570l.05DEPTH(ft)201.0Diorite(cont'd)237.7214.4-218.5Coreloss0.3'.HOLENO.SHEETNO.8(ACRES)0525040...!!.~~T~~.!~\.!~ANCHORAGE,A~ASKA205.0-205.3Highlyfractured.OESCRIPTION:ROCKTYPE223.7-228.7Mediumgrained.Jointspacingclose.Ironstainingandcalciteonfracturesurfaces.Coreloss0.2'.230.7-241.0Altered,bleached.Soft.Jointspacingclose,slightlytomoderatelyweathered.Penetrative(toapproximately1cm)ironstainingalongjoints.Sulfidemineralization.207.1-209.3Brecciated,healed.Coreloss0.4'.228.7-230.7Jointspacingmoderatelyclose,/rockmorecompetent.•ACRESAMERICANINCORPORATEDAPD(~CONSULTINGENGINEERSundBUFFALO,NEWYORKDRILLINGREPORTSUSITNAHVCRCELECTRICPRC.JECTforALASKAPCWERAUTHCRITVSITEWATANANORTHABUTMENTJOBNO.P570l.05DEPTH(ft)201.0Diorite(cont'd) HOLENO.BH-2SHEETNO._9_OF-.£(ACRES)052504(RaM)DESCRIPTION:(265.0-271.0)Coreloss0.5'.96(80)L.~FCoffE.REC.RUN(RQO)R68105237.7(57)to241.9R69111241.9(20)to247.2R70104247.2(38)to252.2R71100252.2(82)to257.2R72257.2to262.2R73100262.2(71)to265.0R7493265.0(75)to269.0R7590269.0(90)to271.0R76100271.0(l00)to276.1262.2RockweakenedandslightlyFracturesfilledwithcarbonateand/or252.2-257.2Slightlymorecompetent.241.9 252.2Highlyfracturedandaltered.Containsnumeroussoft,friablezonesthroughoutwithcalcareousclaycommon.Manyjointsweaklyhealedwithcarbonate.Zoneisgenerallyincompetent(possibleshearzone).241.0-241.9Altered,verysoft,slickclay.257.2friable.clay.262.2-285.8Lightgreentowhite.Veryhard,competent,fresh.Jointspacingveryclosetoclose,calciteandpyriteonjointsurfaces.REPORTHVDROELECTRICPRO..JECTSKAPOWERAUTHORITVNORTHABUTMENTJOBNO.P5701.05ESAMERICANINCORPORATED1--,0\-.=.....-1NSULTINGENGINEERS!!.~~T~~..!!...!~FFALOINEWYORKANCHORAGE,AL.ASKAHOLENO.BH-2SHEETNO._9_OF-.£(ACRES)052504(RaM)DESCRIPTION:(265.0-271.0)Coreloss0.5'.96(80)L.~FCoffE.REC.RUN(RQO)R68105237.7(57)to241.9R69111241.9(20)to247.2R70104247.2(38)to252.2R71100252.2(82)to257.2R72257.2to262.2R73100262.2(71)to265.0R7493265.0(75)to269.0R7590269.0(90)to271.0R76100271.0(l00)to276.1262.2RockweakenedandslightlyFracturesfilledwithcarbonateand/or252.2-257.2Slightlymorecompetent.241.9 252.2Highlyfracturedandaltered.Containsnumeroussoft,friablezonesthroughoutwithcalcareousclaycommon.Manyjointsweaklyhealedwithcarbonate.Zoneisgenerallyincompetent(possibleshearzone).241.0-241.9Altered,verysoft,slickclay.257.2friable.clay.262.2-285.8Lightgreentowhite.Veryhard,competent,fresh.Jointspacingveryclosetoclose,calciteandpyriteonjointsurfaces.REPORTHVDROELECTRICPRO..JECTSKAPOWERAUTHORITVNORTHABUTMENTJOBNO.P5701.05ESAMERICANINCORPORATED1--,0\-.=.....-1NSULTINGENGINEERS!!.~~T~~..!!...!~FFALOINEWYORKANCHORAGE,AL.ASKA Highlyfractured,incompetent.R79285.8to287.8R78280.6to285.8R85310.2to315.4R83301.1to306.1R80287.8to291.1R84306.1to310.2R82296.1to301.1R81291.1to296.1HOLENO.BH-2SHEETNO....l2.-(ACRES)052504ANCHORAGE,ALASKA285.8-287.8Coreloss0.1'.301.1-306.1Coreloss0.4'.306.1-310.0Jointspacingmoderatelyclosetowide.DESCRIPTION:ROCKTYPEDRILLINGREPeRTSUSITNAHVDRCELECTRICPRC..JECTforALASKAPCWERAUTHCRITVSITEWATANANORTHABUTMENTJOBNO.P5701.05315.4[iiJACRESAMERICANINCORPORATEDIPDI~CONSULTINGENGINEERSIIun0BUFFALO,NEWYORK276.1Diorite(cont'd)Highlyfractured,incompetent.R79285.8to287.8R78280.6to285.8R85310.2to315.4R83301.1to306.1R80287.8to291.1R84306.1to310.2R82296.1to301.1R81291.1to296.1HOLENO.BH-2SHEETNO....l2.-(ACRES)052504ANCHORAGE,ALASKA285.8-287.8Coreloss0.1'.301.1-306.1Coreloss0.4'.306.1-310.0Jointspacingmoderatelyclosetowide.DESCRIPTION:ROCKTYPEDRILLINGREPeRTSUSITNAHVDRCELECTRICPRC..JECTforALASKAPCWERAUTHCRITVSITEWATANANORTHABUTMENTJOBNO.P5701.05315.4[iiJACRESAMERICANINCORPORATEDIPDI~CONSULTINGENGINEERSIIun0BUFFALO,NEWYORK276.1Diorite(cont'd) (328.0,331.4)Slickensides.100(84)R86100315.4(98)to320.6R87100320.6(91)to325.3R88100325.3(85)to328.0R89100328.0(62)to332.4R90100332.4(90)to337.5R91100337.5(97)to341.0R92100341.0(100)to341.4R93100341.4(lOO)to346.6R94346.6to351.0HOLENO...:::B:::.:H~-2::....-__SHEETNO.J.LOF.J:l..(ACRES)052504(RaM)ANCHORAGE,ALASKAFreshtoslightlyweathered,hardJointspacingmoderatelycloseto322.0Highlyalteredzone.Friable.(334.4-335.8)Highlyalteredandfriable.328.0-348.6Alterationzone,jointspacingveryclosetomoderatelyclose,moderatelyhardtosoftandfriablelocally.Sulfidemineral-izationthroughout.Minorcalciteandchloriteonjoints.348.6-362.5toveryhard.wide.DESCRIPTION:•CRESAMERICANINCORPORATED1-------1CONSULTINGENGINEERSBUFFALOINEWYORKGREPORTAHVDROELECTRICPRO.JECTLASKAPOWERAUTHORITVANORTHABUTMENTJOBNO.P5701.05(328.0,331.4)Slickensides.100(84)R86100315.4(98)to320.6R87100320.6(91)to325.3R88100325.3(85)to328.0R89100328.0(62)to332.4R90100332.4(90)to337.5R91100337.5(97)to341.0R92100341.0(100)to341.4R93100341.4(lOO)to346.6R94346.6to351.0HOLENO...:::B:::.:H~-2::....-__SHEETNO.J.LOF.J:l..(ACRES)052504(RaM)ANCHORAGE,ALASKAFreshtoslightlyweathered,hardJointspacingmoderatelycloseto322.0Highlyalteredzone.Friable.(334.4-335.8)Highlyalteredandfriable.328.0-348.6Alterationzone,jointspacingveryclosetomoderatelyclose,moderatelyhardtosoftandfriablelocally.Sulfidemineral-izationthroughout.Minorcalciteandchloriteonjoints.348.6-362.5toveryhard.wide.DESCRIPTION:•CRESAMERICANINCORPORATED1-------1CONSULTINGENGINEERSBUFFALOINEWYORKGREPORTAHVDROELECTRICPRO.JECTLASKAPOWERAUTHORITVANORTHABUTMENTJOBNO.P5701.05 DRILLINGREPORTSUSITNAHYDROELECTRICPRO....ECTforALASKAPOWERAUTHORITYSITEWATANANORTHABUTMENTJOBNO.PS701.05m.ACRESAMERICANINCORPORATEDAPD[~CONSULTING'ENGINEERSUn[dBUFFALO,NEWYORKHOLENO.BHSHEETNO.(ACRES)0..,~~.r~~.!!1.!~ANCHORAGE,ALASKA361.0-366.0Coreloss0.4'.(375.8-318.0)Coreloss0.3'.370.3-381.0Calciteandsulfidesinjoints.Intermixed,transitional.rocktypes.Palegreenorwhite,togray.Phaneritictoaphanitictexture.Freshwithsomealterationzonesasnotedbelow.Hard.Jointsverycloselyspaced.362.5-363.5Quartzvein.386.2-3'86.8Highlyalteredandsoft.386.8-401.0Hard,fairlycompetent.Jointspacingveryclosetoclose.Numeroushealedjointsthroughout.DESCRIPTION:ROCKTYPEDioriteandAndesite362.5396.3DEPTH(ft)351.0Diorite(cont'd)DRILLINGREPORTSUSITNAHYDROELECTRICPRO....ECTforALASKAPOWERAUTHORITYSITEWATANANORTHABUTMENTJOBNO.PS701.05m.ACRESAMERICANINCORPORATEDAPD[~CONSULTING'ENGINEERSUn[dBUFFALO,NEWYORKHOLENO.BHSHEETNO.(ACRES)0..,~~.r~~.!!1.!~ANCHORAGE,ALASKA361.0-366.0Coreloss0.4'.(375.8-318.0)Coreloss0.3'.370.3-381.0Calciteandsulfidesinjoints.Intermixed,transitional.rocktypes.Palegreenorwhite,togray.Phaneritictoaphanitictexture.Freshwithsomealterationzonesasnotedbelow.Hard.Jointsverycloselyspaced.362.5-363.5Quartzvein.386.2-3'86.8Highlyalteredandsoft.386.8-401.0Hard,fairlycompetent.Jointspacingveryclosetoclose.Numeroushealedjointsthroughout.DESCRIPTION:ROCKTYPEDioriteandAndesite362.5396.3DEPTH(ft)351.0Diorite(cont'd) ANCHORAGE,A~ASKACRESAMERICANINCORPORATEDI--------r''''\.;.ONSULTINGENGINEERSUFFALO,NEWYORKGREPORTAHYDROELECTRICPRO.JECTASKAPOWERAUTHORITYANORTHABUTMENTJOBNO.P5701.05OEseRIPTION:EndofHoleHOLENO...;::B=H'--2=--__SHEETNO..l:.2.-0F.1d..(ACRES)052504(RaM)l.;FCoffE.REC.RUN(RQD)R104100396.3(80)to398.8RIDS100398.8(100)to401.0ANCHORAGE,A~ASKACRESAMERICANINCORPORATEDI--------r''''\.;.ONSULTINGENGINEERSUFFALO,NEWYORKGREPORTAHYDROELECTRICPRO.JECTASKAPOWERAUTHORITYANORTHABUTMENTJOBNO.P5701.05OEseRIPTION:EndofHoleHOLENO...;::B=H'--2=--__SHEETNO..l:.2.-0F.1d..(ACRES)052504(RaM)l.;FCoffE.REC.RUN(RQD)R104100396.3(80)to398.8RIDS100398.8(100)to401.0 ANDESITEaDIORITEANDESITEHIGHLYFRACTURED,ALTEREDaMINERALIZATIONSHEARZONE(HOLECAVING)IHIGHLYFRACTUREDWEATHEREDANDIMCOMPETENT(HOLECAVING)ALTEREDSHEARZONESLICKS-----lSUCKSALTEREDMAFICaULTRA-MAFICINCLUSIONSSHEARZONESLICKSSHEARZONESHEARZONEBRECCIACLAYHIGHLYFRACTUREDCALCAREOUSZONECLAYWEATHERED,SHEAREDFRACTUREDZONE_SHEARZONENUMBEROFJOINTSPER10FT.5101520REMARKSINCORPORATEDALTEREDaif1':::;r:;;L.,I--l-t--+-+-+--------JMINERALIZED~\3-~~HR~TURED,DIORITE.iIiI~Ij-I--t-r_-r-i-------~MINERAUZEDPERMEABILITY(xlem/see.n~10-510-310-1lE~AMERICANo183532016060180crh-rtr-rl--l-+-+-+-l-TOPOFROCK--------....20GOUGE40280340140260300200100120240220SUMMARYBEDROCKLOGSHOLENO.BH-2DATEJULY1980LOCATION----:N..:..:O:..:..R..:....:T..:...;H~A:....:.=.BU=_T..:....M=E.:..:N...:..T_-....:W...:..:.A..:..::r..:....A:..:..:N..:....A=____ACRESANDESITEaDIORITEANDESITEHIGHLYFRACTURED,ALTEREDaMINERALIZATIONSHEARZONE(HOLECAVING)IHIGHLYFRACTUREDWEATHEREDANDIMCOMPETENT(HOLECAVING)ALTEREDSHEARZONESLICKS-----lSUCKSALTEREDMAFICaULTRA-MAFICINCLUSIONSSHEARZONESLICKSSHEARZONESHEARZONEBRECCIACLAYHIGHLYFRACTUREDCALCAREOUSZONECLAYWEATHERED,SHEAREDFRACTUREDZONE_SHEARZONENUMBEROFJOINTSPER10FT.5101520REMARKSINCORPORATEDALTEREDaif1':::;r:;;L.,I--l-t--+-+-+--------JMINERALIZED~\3-~~HR~TURED,DIORITE.iIiI~Ij-I--t-r_-r-i-------~MINERAUZEDPERMEABILITY(xlem/see.n~10-510-310-1lE~AMERICANo183532016060180crh-rtr-rl--l-+-+-+-l-TOPOFROCK--------....20GOUGE40280340140260300200100120240220SUMMARYBEDROCKLOGSHOLENO.BH-2DATEJULY1980LOCATION----:N..:..:O:..:..R..:....:T..:...;H~A:....:.=.BU=_T..:....M=E.:..:N...:..T_-....:W...:..:.A..:..::r..:....A:..:..:N..:....A=____ACRES BEDROCKLOGSHOLENO.BH-2DATEJULY1980LOCAT!ON~N~O:::..:R~TL:H...:..-.:A~B:::.:U~T!...!M,!!;E~N..!..T!..---...:.:W:..:::A~:rA~N~A~_ALTEREDREMARKSNUMBEROFJOINTSPER10FT.5101520---+--+--+-+-l._OUARTZVEIN-------INCORPORATED.~qC::~~l-ENDOFHOLE----....CORERECOVERYaR.O.D.0/0204060BOPERMEABILITY(xlem/sec.5~10-510-310-1~?=AMERICAN400380360ACRESBEDROCKLOGSHOLENO.BH-2DATEJULY1980LOCAT!ON~N~O:::..:R~TL:H...:..-.:A~B:::.:U~T!...!M,!!;E~N..!..T!..---...:.:W:..:::A~:rA~N~A~_ALTEREDREMARKSNUMBEROFJOINTSPER10FT.5101520---+--+--+-+-l._OUARTZVEIN-------INCORPORATED.~qC::~~l-ENDOFHOLE----....CORERECOVERYaR.O.D.0/0204060BOPERMEABILITY(xlem/sec.5~10-510-310-1~?=AMERICAN400380360ACRES Elevation1835OFWATERPRESSURETESTRESULTSestedGaugeDurationFlowCoefficientofToPressureofTestRatePermeability(feet)(psi)(min)(gpm)(em/sec)402020.322.26x10-5552610.189.80x10-6703020.42to2.51.98x10-5to-41.17x1055°S.H.- 2NoneWatanaGreaterthan70·belowsurfaceLevelElevation1835OFWATERPRESSURETESTRESULTSestedGaugeDurationFlowCoefficientofToPressureofTestRatePermeability(feet)(psi)(min)(gpm)(em/sec)402020.322.26x10-5552610.189.80x10-6703020.42to2.51.98x10-5to-41.17x1055°S.H.- 2NoneWatanaGreaterthan70·belowsurfaceLevel un174.0(74)00.7un2930.7(74)0S.Oun31025.0(57)09.6un4839.6(0)03.8100(0)06.8(RaM)(ACRES)OJ,LENGTHcORE.OFREC.RUN(RQDJHOLENO.B,.H.'6,.SHEETNO._l_OF~(ACRES)OS2504(RaM)R&MCONSULTANTS,INC.._1......._,.."••.aTa~.\01"•..,a.ANCHORAGE,ALASKAN62°49I24.891ELEVATIONS:DATUMW148°32I21.862DRILLPLATFORM__---::--::_2250GROUNDSURFACE_---.;;:1,;;.60.;;..5;;.".;;;f..;;:t,;;.._600ROCKSURFACE1598.1ft.BOTTOMOFHOLE__9~6~3;,.:..=8.....Jf~t~.:--:::-:::--;::,WATERTABLE1458ft.12-06-80DESCRIPTION:Brownsandygravelwithcobblesandboulders.Palegreentograybiotite,hornblende,QuartzDiorite.Maficsapproximately30%,mediwngrained,nonfoliated.Slightlytomoderatelyweathered.Jointspacingveryclosetomoderatelyclose.Ironstainingpresentalongsomejoints,occasionalhealedfractures.8.0-10.7Coreloss0.7'.17.2-18.0Highlyfractured.19.6-27Highlyfractured,coreloss0.7'.Lighttantolightgrey,hornblende,QuartzMonzonite.Finetomediwngrained,nonfoliated.Slightlytohighlyweathered,locallyfriable,andporous.Ironstainingandsolutioncavitiescommon.Rockgenerallyincompetent.Jointspacingveryclosetoclose.PalegreentograybiotitehornblendequartzGranodiorite.Maficsaverageapproximately20%.Finetomediwngrained.Moderatelyhardtoveryalonghole.CasingAdyancerCASINGDIAM._--.....:NW:.:.:.:..,;.~...:(...4i.o"-"'I.......D..."""')----=D;..=i;=:a=mo:::.::n~d;:....;:C....or_·o;;;.._..;;:D;..=rc:;;:i.=.ll=~.;;.;;·n.;;..g<--COREDIAM.NQ~3:':'(1.7S")TheDrillingCompanyRESAMERICANINCORPORATEDNSULTINGENGINEERSFFALOtNEWYORKGREPORTAHYDROELECTRICPRC..JECTSKAPOWERAUTHORITYNorthAbutmen'tJOBNO.PS701.0SLATITUDEDEPARTUREBEARINGINITIALDIPOTHERDIPS_STARTED07:00.M._--:;Jun-:;-e---;2::-61980__----------,FINISHED,----M.July91980___-~=~--::.J..:.•....;H:;;:A.:..:G::.;AN::.:..._(RaM)APPROVED_L.ACOMBDATEAPPROVED_"""'--(ACRES)DATEun174.0(74)00.7un2930.7(74)0S.Oun31025,0(57)09.6un4839.6(0)03,8100(0)06.8(RaM)(ACRES)OJ,LENGTHcORE.OFREC.RUN(RQDJHOLENO.B,.H.'6,.SHEETNO._l_OF~(ACRES)OS2504(RaM)R&MCONSULTANTS,INC.._1......._,.."••.aTa~.\01"•..,a.ANCHORAGE,ALASKAN62°49I24.891ELEVATIONS:DATUMW148°32I21.862DRILLPLATFORM__---::--::_2250GROUNDSURFACE_---.;;:1,;;.60.;;..5;;.".;;;f..;;:t,;;.,_600ROCKSURFACE1598.1ft,BOTTOMOFHOLE__9~6~3;,.:..=8.....Jf~t~.:--:::-:::--;::,WATERTABLE1458ft,12-06-80DESCRIPTION:Brownsandygravelwithcobblesandboulders,Palegreentograybiotite,hornblende,QuartzDiorite.Maficsapproximately30%,mediwngrained,nonfoliated,Slightlytomoderatelyweathered.Jointspacingveryclosetomoderatelyclose.Ironstainingpresentalongsomejoints,occasionalhealedfractures.8,0-10,7Coreloss0.7',17.2-18,0Highlyfractured,19.6-27Highlyfractured,coreloss0.7'.Lighttantolightgrey,hornblende,QuartzMonzonite.Finetomediwngrained,nonfoliated.Slightlytohighlyweathered,locallyfriable,andporous,Ironstainingandsolutioncavitiescommon,Rockgenerallyincompetent,Jointspacingveryclosetoclose,PalegreentograybiotitehornblendequartzGranodiorite,Maficsaverageapproximately20%,Finetomediwngrained,Moderatelyhardtoveryalonghole,CasingAdyancerCASINGDIAM._--.....:NW:.:.:.:..,;.~...:(...4i.o"-"'I.......D..,"""')----=D;..=i;=:a=mo:::.::n~d;:....;:C....or_·o;;;.._..;;:D;..=rc:;;:i.=.ll=~.;;.;;·n.;;..g<--COREDIAM.NQ~3:':'(1.7S")TheDrillingCompanyRESAMERICANINCORPORATEDNSULTINGENGINEERSFFALOtNEWYORKGREPORTAHYDROELECTRICPRC..JECTSKAPOWERAUTHORITYNorthAbutmen'tJOBNO.PS701.0SLATITUDEDEPARTUREBEARINGINITIALDIPOTHERDIPS_STARTED07:00.M._--:;Jun-:;-e---;2::-61980__----------,FINISHED,----M.July91980___-~=~--::.J..:.•....;H:;;:A.:..:G::.;AN::.:..._(RaM)APPROVED_L,ACOMBDATEAPPROVED_"""'--(ACRES)DATE •ACRESAMERICANINCORPORATEDAPDIPCONSULTINGENGINEERSun0BUFFALO,NEWYORKDRILLINGREPORTSUSITNAHYDROELECTRICPRD.JECTforALASKAPOWERAUTHORITYSITEWatanaNorthAbutmentJOBNO.P5701.05to55.HOLENO.SHEETNO.(ACRES)26.8-30.0Coreloss0.5'.29.530.0Highlyfracturedandweathered.Clayfillingcommon.45.0-49.1Highlyfracturedzone.40.5-45.0Coreloss0.2'.hard,freshtoslightlyweathered.stainingandclayresidueonsomejointsurfaces.Jointspacingveryclosetomoderatelyclosewithjointsorientedapproximately40°to55°tocoreaxis.Occasionalhighlyfracturedzones0.1'to1.1'thick,withclaygouge.Healedfracturesthroughout.49.1-51.4Shearzone,highlyfracturedwithclaygouge.DESCRIPTION:DEPTHROCKTYPE(ft)55.526.8Granodiorite(cont'd)•ACRESAMERICANINCORPORATEDAPDIPCONSULTINGENGINEERSun0BUFFALO,NEWYORKDRILLINGREPORTSUSITNAHYDROELECTRICPRD.JECTforALASKAPOWERAUTHORITYSITEWatanaNorthAbutmentJOBNO.P5701.05to55.HOLENO.SHEETNO.(ACRES)26.8-30.0Coreloss0.5'.29.530.0Highlyfracturedandweathered.Clayfillingcommon.45.0-49.1Highlyfracturedzone.40.5-45.0Coreloss0.2'.hard,freshtoslightlyweathered.stainingandclayresidueonsomejointsurfaces.Jointspacingveryclosetomoderatelyclosewithjointsorientedapproximately40°to55°tocoreaxis.Occasionalhighlyfracturedzones0.1'to1.1'thick,withclaygouge.Healedfracturesthroughout.49.1-51.4Shearzone,highlyfracturedwithclaygouge.DESCRIPTION:DEPTHROCKTYPE(ft)55.526.8Granodiorite(cont'd) o(0)100(52)100(88)104(59)L~FCoffE.REC.RUN(RQD)R1510055.5(53)to59.3R1610059.3(79)to63.2R1866.5to67.3R2010067.7(59)to70.4R1763.2to66.5R1910067.3(0)to67.7R2275.3to80.3HOLENO.BH-6SHEETNO._3_OF~(ACRES)052504(RaM)Shearzone,slickenslidesandclayR2170.4to75.3R2310080.3(92)to84.275.3-149.4Competent,hardtoveryhardfreshtoslightlyweathered.Jointspacingveryclosetowide.65.3-75.3Highlyfracturedandshearedzoneslighttohighlyweathered,moderatelyhardtosoftandfriablelocally.Jointspacingveryclosetoclose.Holecavingduringdrilling.(66.5-67.3)Coreloss0.8'.(71.5-73.0)gouge.(65.5)Veryfriable.DESCRIPTION:REPORTHYDROELECTRICPRO.JECTSKAPOWERAUTHORITYNorthAbutmentJOBNO.P570l.05RESAMERICANINCORPORATEDI-------.I~NSULTINGENGINEERS~~-:T~~.r!.~~~FFALOINEWYORKANCHORAGE,ALASKAo(0)100(52)100(88)104(59)L~FCoffE.REC.RUN(RQD)R1510055.5(53)to59.3R1610059.3(79)to63.2R1866.5to67.3R2010067.7(59)to70.4R1763.2to66.5R1910067.3(0)to67.7R2275.3to80.3HOLENO.BH-6SHEETNO._3_OF~(ACRES)052504(RaM)Shearzone,slickenslidesandclayR2170.4to75.3R2310080.3(92)to84.275.3-149.4Competent,hardtoveryhardfreshtoslightlyweathered.Jointspacingveryclosetowide.65.3-75.3Highlyfracturedandshearedzoneslighttohighlyweathered,moderatelyhardtosoftandfriablelocally.Jointspacingveryclosetoclose.Holecavingduringdrilling.(66.5-67.3)Coreloss0.8'.(71.5-73.0)gouge.(65.5)Veryfriable.DESCRIPTION:REPORTHYDROELECTRICPRO.JECTSKAPOWERAUTHORITYNorthAbutmentJOBNO.P570l.05RESAMERICANINCORPORATEDI-------.I~NSULTINGENGINEERS~~-:T~~.r!.~~~FFALOINEWYORKANCHORAGE,ALASKA L.~f!GTH1COFRRUN(FR24184.2(to89.3R2589.3to94.6R26194.6to98.5R2798.5to100.3R28100.3to101.5R29101-I(to102.5R30102.to103.R31103.to108R32108.to111.HOLENO.BH-6SHEETNO41"\1;-'-'{ACRES}052504,(RE108.2-111.7Coreloss0.1'.98.5-100.3Coreloss0.1'.89.3-94.6Coreloss0.2'.DESCRIPTION:ROCKTYPEDEPTH81.2Granodiorite(cont'd)111.7•ACRESAMERICANINCORPORATED1--...J!2-~I.-:~.;.J.:.N'l'L..._..........!.!.A~IPDI~CONSULTINGENGINEERS~~.!'!!!.---=T~~.!!.·.!~]lIundBUFFALO,NEWYORKANCHORAGE,ALASKA1-----_--1----_---.DRILLINGREPORT&USITNAHVDROELECTRICPRD..JECTforALASKAPOWERAUTHORITVSITEWatanaNorthAbutmentJOBNO.P5701.05L.~f!GTH1COFRRUN(FR24184.2(to89.3R2589.3to94.6R26194.6to98.5R2798.5to100.3R28100.3to101.5R29101-I(to102.5R30102.to103.R31103.to108R32108.to111.HOLENO.BH-6SHEETNO41"\1;-'-'{ACRES}052504,(RE108.2-111.7Coreloss0.1'.98.5-100.3Coreloss0.1'.89.3-94.6Coreloss0.2'.DESCRIPTION:ROCKTYPEDEPTH81.2Granodiorite(cont'd)111.7•ACRESAMERICANINCORPORATED1--...J!2-~I.-:~.;.J.:.N'l'L..._..........!.!.A~IPDI~CONSULTINGENGINEERS~~.!'!!!.---=T~~.!!.·.!~]lIundBUFFALO,NEWYORKANCHORAGE,ALASKA1-----_--1----_---.DRILLINGREPORT&USITNAHVDROELECTRICPRD..JECTforALASKAPOWERAUTHORITVSITEWatanaNorthAbutmentJOBNO.P5701.05 R33100111.7(91)to112.7112.7-122.1Coreloss0.4'.R3493112.7(91)to117.2R3598117.2(98)to122.1R36100122.1(100)to127.2R37100127.2(100)to128.7R38100128.7(100)to130.8R39100130.8(86)to135.8R40100135.8(78)to140.8R41104140.8(98)to145.6ANCHORAGE,A~ASKAL~FC~E.REC.RUN(RQO)HOLENO.BH-6SHEETNO.~OF.1.Q..(ACRES)052504(RaM)·DESCRIPTION:ACRESAMERICANINCORPORATEDI------..JCONSULTINGENGINEERSBUFFALOINEWYORKGREPORTNAHVDROELECTRICPRO.JECTLASKAPOWERAUTHORITVaNorthAbutmentJOBNO.P5701.05R33100111.7(91)to112.7112.7-122.1Coreloss0.4'.R3493112.7(91)to117.2R3598117.2(98)to122.1R36100122.1(100)to127.2R37100127.2(100)to128.7R38100128.7(100)to130.8R39100130.8(86)to135.8R40100135.8(78)to140.8R41104140.8(98)to145.6ANCHORAGE,A~ASKAL~FC~E.REC.RUN(RQO)HOLENO.BH-6SHEETNO.~OF.1.Q..(ACRES)052504(RaM)·DESCRIPTION:ACRESAMERICANINCORPORATEDI------..JCONSULTINGENGINEERSBUFFALOINEWYORKGREPORTNAHVDROELECTRICPRO.JECTLASKAPOWERAUTHORITVaNorthAbutmentJOBNO.P5701.05 190.0165.6-175.2Coreloss0.3'.HOLENO.BSHEETNO.6(ACRES)~~T~.!!...!~ANCHORAGE,ALASKA149.4-149.6Highlyfractured.DESCRIPTION:160.6187.0Highlyalteredandweathered.Moderatelyhardtosoftandveryfriablelocally.Jointspacingveryclosetoclose.Minorsulfidemineralizationandcarbonatethroughout.187.0-240.3Generallyhardandfreshexceptforveryslightweatheringalongjointsandfractures.152.5,154.5Altered,weatheredzones,friable.•ACRESAMERICANINCORPORATEDIPD[~CONSULTINGENGINEERSIlUDldBUFFALO,NEWYORKDRILLINGREPORTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEWatanaNorthAbutmentJOBNO.P570l.05DEPTHROCKTYPE(ft)145.6Granodiorite(cont'd)190.0165.6-175.2Coreloss0.3'.HOLENO.BSHEETNO.6(ACRES)~~T~.!!...!~ANCHORAGE,ALASKA149.4-149.6Highlyfractured.DESCRIPTION:160.6187.0Highlyalteredandweathered.Moderatelyhardtosoftandveryfriablelocally.Jointspacingveryclosetoclose.Minorsulfidemineralizationandcarbonatethroughout.187.0-240.3Generallyhardandfreshexceptforveryslightweatheringalongjointsandfractures.152.5,154.5Altered,weatheredzones,friable.•ACRESAMERICANINCORPORATEDIPD[~CONSULTINGENGINEERSIlUDldBUFFALO,NEWYORKDRILLINGREPORTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEWatanaNorthAbutmentJOBNO.P570l.05DEPTHROCKTYPE(ft)145.6Granodiorite(cont'd) 100(90)LOFCoffE.REC.RUN(RQO)R57100220.0(100)to225.2R58100225.2(98)to230.1R56215.0to220.0R59100230.1(100)to235.4HOLENO._B=H;;;..-..,::6__SHEETNO._7_OF~(ACRES)052504(RaM)HighlyfracturedandmoderatelyR51100190.0(100)to195.1R52100195.1(100)to200.2R53100200.2(88)to205.0R54.1t]0205.0(100)to210.0210.0-215.0Coreloss0.3I •R5594210.0(96)to215.0215.4-215.7weathered.TYPEDESCRIPTION:CRESAMERICANINCORPORATEDI------.f"~~ONSULTINGENGINEERS~~c.2.'~T~~..!!.\.!~UFFALOINEWYORKANCHORAGE,ALASKAGREPORTAHYDROELECTRICPRO..JECTLASKAPOWERAUTHORITYanaNorthAbutmentJOBNO.P5701.05100(90)LOFCoffE.REC.RUN(RQO)R57100220.0(100)to225.2R58100225.2(98)to230.1R56215.0to220.0R59100230.1(100)to235.4HOLENO._B=H;;;..-..,::6__SHEETNO._7_OF~(ACRES)052504(RaM)HighlyfracturedandmoderatelyR51100190.0(100)to195.1R52100195.1(100)to200.2R53100200.2(88)to205.0R54.1t]0205.0(100)to210.0210.0-215.0Coreloss0.3I •R5594210.0(96)to215.0215.4-215.7weathered.TYPEDESCRIPTION:CRESAMERICANINCORPORATEDI------.f"~~ONSULTINGENGINEERS~~c.2.'~T~~..!!.\.!~UFFALOINEWYORKANCHORAGE,ALASKAGREPORTAHYDROELECTRICPRO..JECTLASKAPOWERAUTHORITYanaNorthAbutmentJOBNO.P5701.05 (256.0-256.7)Highlyaltered,veryfriable.Clayfilling(possibleshearzone).HOLENO.SHEETNO.(ACRES)~c::2!~.M..;T~~..!!....!~ANCHORAGE,ALASKA273-273.7Alteredzone,friable,sandylocally.275-325.6Generallyhard,freshandcompetent.Jointspacingclosetomoderatelyclose.Lightgreen,topinkandgrayhornblendeQuartzDiorite.Finetomediumgrained,nonfoliatedwithapproximately30%mafics.Generallyhardandfresh,clayandpyritecrystalscommononfracturedsurfaces.Occasionalthin(lessthan0.1')calciteveinsandhealedjointsthroughout.Jointspacingclosetomoderatelyclose.(256.8)Slickensides.OESCRIPTION:QuartzDioriteROCKTYPEGranodiorite(cont'd)240.3-260.0Transitionalzoneintounderlyingquartzdiorite.Containsthinalteredfriablezoneslocally.Numerousverythinveinsofcalcitethroughout.DRILLINGREPCRTSUSITNAHYDROELECTRICPRD..JECTforALASKAPOWERAUTHDRITYSITEWatanaNorthAbutmentJOBNO.P5701.05260m.ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUn[dBUFFALOINEWYORKDEPTH(ft)235.4280.3(256.0-256.7)Highlyaltered,veryfriable.Clayfilling(possibleshearzone).HOLENO.SHEETNO.(ACRES)~c::2!~.M..;T~~..!!....!~ANCHORAGE,ALASKA273-273.7Alteredzone,friable,sandylocally.275-325.6Generallyhard,freshandcompetent.Jointspacingclosetomoderatelyclose.Lightgreen,topinkandgrayhornblendeQuartzDiorite.Finetomediumgrained,nonfoliatedwithapproximately30%mafics.Generallyhardandfresh,clayandpyritecrystalscommononfracturedsurfaces.Occasionalthin(lessthan0.1')calciteveinsandhealedjointsthroughout.Jointspacingclosetomoderatelyclose.(256.8)Slickensides.OESCRIPTION:QuartzDioriteROCKTYPEGranodiorite(cont'd)240.3-260.0Transitionalzoneintounderlyingquartzdiorite.Containsthinalteredfriablezoneslocally.Numerousverythinveinsofcalcitethroughout.DRILLINGREPCRTSUSITNAHYDROELECTRICPRD..JECTforALASKAPOWERAUTHDRITYSITEWatanaNorthAbutmentJOBNO.P5701.05260m.ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUn[dBUFFALOINEWYORKDEPTH(ft)235.4280.3 ANCHORAGE,A~ASKA100(96)HOLENO.BH-6SHEETNO._9_0F22.-(ACRES)052504(RaM)LEC~E.OFREC.RUN(RQD)R69100280.3(100)to281.6R70100281.6(100),to284.6R7195284.6(95)to286.6R7298286.6('98.)to290.6R73100290.6(100)to295.6100(96)07510000.7(100)as.07610005.0(100)284.6-290.6Coreloss0.2I •DESCRIPTION:REPORTHVDROELECTRICPRO....ECTSKAPOWERAUTHORITVNorthAbutmentJOBNO.P5701.asRESAMERICANINCORPORATEDt--------'"NSULTINGENGINEERSFFALOINEWYORKANCHORAGE,A~ASKA100(96)HOLENO.BH-6SHEETNO._9_0F22.-(ACRES)052504(RaM)LEC~E.OFREC.RUN(RQD)R69100280.3(100)to281.6R70100281.6(100),to284.6R7195284.6(95)to286.6R7298286.6('98.)to290.6R73100290.6(100)to295.6100(96)07510000.7(100)as.07610005.0(100)284.6-290.6Coreloss0.2I •DESCRIPTION:REPORTHVDROELECTRICPRO....ECTSKAPOWERAUTHORITVNorthAbutmentJOBNO.P5701.asRESAMERICANINCORPORATEDt--------'"NSULTINGENGINEERSFFALOINEWYORK DRILLINGREPORTSUSITNAHVDROELECTRICPRO.JECTforALASKAPOWERAUTHORITVSITEWatanaNorthAbutmentJOBNO.P5701.05veryR325.to330.HOLENO.SHSHEETNO.1(ACRES)052504lIIaMccr.-....II!..TANT••INC.•........-_••T_llU_vavO••ANCHORAGE,ALASKA318.6-320.1Alteredzone,chalky,bleached,friablealongjoints.320.6-325.6Coreloss0.2'.325.6-332.7Highlyfracturedandaltered,softandfriable.Coreloss3.0'.342.0Alteredzone,friable,weaklyhealedwithcarbonate.343.0-343.2Highlyfractured.Coreloss0.2'.352.9-362.5Highlyfractured,friable,soft.DESCRIPTION:[i]ACRESAMERICANINCORPORATEDIPD[~CONSULTINGENGINEERSIIUn[dBUFFALO,NEWYORK358.9DEPTHROCKTYPE(ft)315.4QuartzDiorite(cant'd)DRILLINGREPORTSUSITNAHVDROELECTRICPRO.JECTforALASKAPOWERAUTHORITVSITEWatanaNorthAbutmentJOBNO.P5701.05veryR325.to330.HOLENO.SHSHEETNO.1(ACRES)052504lIIaMccr.-....II!..TANT••INC.•........-_••T_llU_vavO••ANCHORAGE,ALASKA318.6-320.1Alteredzone,chalky,bleached,friablealongjoints.320.6-325.6Coreloss0.2'.325.6-332.7Highlyfracturedandaltered,softandfriable.Coreloss3.0'.342.0Alteredzone,friable,weaklyhealedwithcarbonate.343.0-343.2Highlyfractured.Coreloss0.2'.352.9-362.5Highlyfractured,friable,soft.DESCRIPTION:[i]ACRESAMERICANINCORPORATEDIPD[~CONSULTINGENGINEERSIIUn[dBUFFALO,NEWYORK358.9DEPTHROCKTYPE(ft)315.4QuartzDiorite(cant'd) 98(98)100(94)100(77)100(100)00.69510098.3(100)o93.398.39410093.3(92)L~FC~E.REC.RUN(ROD)R87100358.9(52)to363.9R88107363.9(98)to368.2R8996368.2(96)to373.2R90373.2to378.491378.4to383.3HOLENO.BH-6SHEETNO.--2:!..0F3..2.-(ACRES)052504(RaM)382-490.5Generallyhardfreshandcompetent.Jointspacingclosetowide.368.2-373.2Coreloss0.2'.367.9Highlyfractured,friable,soft.374.5,377.0, 380.4,and382.0Highlyfractured,friable,soft.(383.3-388.3)Coreloss0.1'.DESCRIPTION:REPORTAHVDROELECTRICPRO.JECTaKAPOWERAUTHORITVnaNorthAbutmentJOBNO.P5701.asCRESAMERICANINCORPORATEDI--r-D~...:...JONSULTINGENGINEERS~~T~~!1.~~UFFALOINEWYORKANCHORAGE,ALASKA98(98)100(94)100(77)100(100)00.69510098.3(100)o93.398.39410093.3(92)L~FC~E.REC.RUN(ROD)R87100358.9(52)to363.9R88107363.9(98)to368.2R8996368.2(96)to373.2R90373.2to378.491378.4to383.3HOLENO.BH-6SHEETNO.--2:!..0F3..2.-(ACRES)052504(RaM)382-490.5Generallyhardfreshandcompetent.Jointspacingclosetowide.368.2-373.2Coreloss0.2'.367.9Highlyfractured,friable,soft.374.5,377.0, 380.4,and382.0Highlyfractured,friable,soft.(383.3-388.3)Coreloss0.1'.DESCRIPTION:REPORTAHVDROELECTRICPRO.JECTaKAPOWERAUTHORITVnaNorthAbutmentJOBNO.P5701.asCRESAMERICANINCORPORATEDI--r-D~...:...JONSULTINGENGINEERS~~T~~!1.~~UFFALOINEWYORKANCHORAGE,ALASKA DRILLINGREPeRTSUSITNAHYDROELECTRICPRO....ECTforALASKAPOWERAUTHORITYSITEWatanaNorthAbutmentJOBNO.P5701.05[iiJ.ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUOrdBUFFALOINEWYORKHOLENO.SHEETNO.-'12(ACRES)052504.....Mcar~TANT.,INC.........-...._I.T_au.v.va••ANCHORAGE,ALASKADESCRIPTION:ROCKTYPE440.4DEPTH(ft)400.6QuartzDiorite(cont1d)DRILLINGREPeRTSUSITNAHYDROELECTRICPRO....ECTforALASKAPOWERAUTHORITYSITEWatanaNorthAbutmentJOBNO.P5701.05[iiJ.ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUOrdBUFFALOINEWYORKHOLENO.SHEETNO.-'12(ACRES)052504.....Mcar~TANT.,INC.........-...._I.T_au.v.va••ANCHORAGE,ALASKADESCRIPTION:ROCKTYPE440.4DEPTH(ft)400.6QuartzDiorite(cont1d) 101(91)13(0)L~FC~E.REC.RUN(RQO)R105100440.4(100)to445.6R106100445.6(:\;00)to450.4R107450.4to455.8R109100458.2(100)to463.2R108.100455.8(100)to458.2R110463.2to464.0R111100464.0(100)to468.4R113100473.3(98)to477.8R112100468.4(100)to473.3minorHOLENO.BH-6SHEETNO.--.l2.OF20(ACRES)052504(RaM)friable,lItaM~TANT.,INC...........-"'_..T."l"A......_.u.v.va••ANCHORAGE,ALASKAMineralizedzone,verysoft,core454.5-454.9Highlyfractured,sulfidemineralization.461.6Fracturedzone.463.2-464loss0.4'.476.2-476.4Fracturedzone.DESCRIPTION:RESAMERICANINCORPORATEDi---I31'ffi\IA-----------jNSULTINGENGINEERSFFALOINEWYORKGREPDRTNAHVDROELECTRICPRO.JECT....ASKAPOWERAUTHORITVatanaNorthAbutmentJOBNO.P5701.05101(91)13(0)L~FC~E.REC.RUN(RQO)R105100440.4(100)to445.6R106100445.6(:\;00)to450.4R107450.4to455.8R109100458.2(100)to463.2R108.100455.8(100)to458.2R110463.2to464.0R111100464.0(100)to468.4R113100473.3(98)to477.8R112100468.4(100)to473.3minorHOLENO.BH-6SHEETNO.--.l2.OF20(ACRES)052504(RaM)friable,lItaM~TANT.,INC...........-"'_..T."l"A......_.u.v.va••ANCHORAGE,ALASKAMineralizedzone,verysoft,core454.5-454.9Highlyfractured,sulfidemineralization.461.6Fracturedzone.463.2-464loss0.4'.476.2-476.4Fracturedzone.DESCRIPTION:RESAMERICANINCORPORATEDi---I31'ffi\IA-----------jNSULTINGENGINEERSFFALOINEWYORKGREPDRTNAHVDROELECTRICPRO.JECT....ASKAPOWERAUTHORITVatanaNorthAbutmentJOBNO.P5701.05 DRILLINGREPORTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEWatanaNorthAbutmentJOBNO.P5701.05R120505.6to510.6R121510.6to515.6R119500.5to505.6R122515.6to520.2mislatchedduringandredrill;core~C.!:!~.r~~..!!....!~ANCHORAGE,ALASKA490.5CorebarrelHadto.pullrods479.1Slickensides.490.5-650.0Generallyfresh,hard,competent.485.3drilling.loss1.4'.498.5,502.1Jointsfilledwithcalcareousclay.DESCRIPTION:mACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUn[dBUFFALO,NEWYORK520.2DEPTHROCKTYPE477.8QuartzDiorite(cont'd)DRILLINGREPORTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEWatanaNorthAbutmentJOBNO.P5701.05R120505.6to510.6R121510.6to515.6R119500.5to505.6R122515.6to520.2mislatchedduringandredrill;core~C.!:!~.r~~..!!....!~ANCHORAGE,ALASKA490.5CorebarrelHadto.pullrods479.1Slickensides.490.5-650.0Generallyfresh,hard,competent.485.3drilling.loss1.4'.498.5,502.1Jointsfilledwithcalcareousclay.DESCRIPTION:mACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUn[dBUFFALOINEWYORK520.2DEPTHROCKTYPE477.8QuartzDiorite(cont'd) HOLENO.•BH-6SHEETNO.--l2...OF.2Q..(ACRES)052504(RaM)520.2-521.0Slightlyfriable.Coreloss0.1'.100(50)L~FC~E.REC.RUN(RQD)R124 104525.6(92)to530.4R126100531.8(0)to532.0R127100532.0(67)to533.5R12887533.5(87)to539.5R12996539.5(86)to544.6R13093544.6(66)to547.5R131100547.5(83)to550.4R12398520.2(83)to525.6hole'R125530.4to531.8ANCHORAGE,ALASKA530.5-532.5Alteredzone,soft,clayey;cavedduringdrilling.539.5-547.5Coreloss0.4'.533.5-539.5Coreloss0.8'.OESCRIPTION:GREPORTAHYDROELECTRICPRO....ECTASKAPOWERAUTHORITYnaNorthAbutmentJOBNO.P5701.05CRESAMERICANINCORPORATEDI---------J'>-:ONSULTINGENGINEERS~~.I!.;T~~!....!~UFFALO,NEWYORKHOLENO.•BH-6SHEETNO.--l2...OF.2Q..(ACRES)052504(RaM)520.2-521.0Slightlyfriable.Coreloss0.1'.100(50)L~FC~E.REC.RUN(RQD)R124 104525.6(92)to530.4R126100531.8(0)to532.0R127100532.0(67)to533.5R12887533.5(87)to539.5R12996539.5(86)to544.6R13093544.6(66)to547.5R131100547.5(83)to550.4R12398520.2(83)to525.6hole'R125530.4to531.8ANCHORAGE,ALASKA530.5-532.5Alteredzone,soft,clayey;cavedduringdrilling.539.5-547.5Coreloss0.4'.533.5-539.5Coreloss0.8'.OESCRIPTION:GREPORTAHYDROELECTRICPRO....ECTASKAPOWERAUTHORITYnaNorthAbutmentJOBNO.P5701.05CRESAMERICANINCORPORATEDI---------J'>-:ONSULTINGENGINEERS~~.I!.;T~~!....!~UFFALO,NEWYORK 590.8-592.8Corebarrelmislatchedduringdrilling,hadtopullrods,coreloss0.5.592.8HOLENO.SHEETNO.(ACRES)~~,!!!:'!.;T.e~.!!.l.!~ANCHORAGE,ALASKAHighlyfracturedandsheared,clay562.7,565.0Slickensides.565.7 -570.7Coreloss0.8I •(569.0)gouge.DESCRIPTION:ROCKTYPE572.3-573.1Brecciated,claygouge.DRILLINGREPeRTSUSITNAHYDROELECTRICPRO~ECTforALASKAPOWERAUTHORITYSITEWatanaNorthAbutmentJOBNO.P570l.05[ii]ACRESAMERICANINCORPORATEDIPO[PCONSULTINGENGINEERSIIUO[OBUFFALOINEWYORK550.4QuartzDiorite(contId)DEPTH(ft590.8-592.8Corebarrelmislatchedduringdrilling,hadtopullrods,coreloss0.5.592.8HOLENO.SHEETNO.(ACRES)~~,!!!:'!.;T.e~.!!.l.!~ANCHORAGE,ALASKAHighlyfracturedandsheared,clay562.7,565.0Slickensides.565.7 -570.7Coreloss0.8I •(569.0)gouge.DESCRIPTION:ROCKTYPE572.3-573.1Brecciated,claygouge.DRILLINGREPeRTSUSITNAHYDROELECTRICPRO~ECTforALASKAPOWERAUTHORITYSITEWatanaNorthAbutmentJOBNO.P570l.05[ii]ACRESAMERICANINCORPORATEDIPO[PCONSULTINGENGINEERSIIUO[OBUFFALOINEWYORK550.4QuartzDiorite(contId)DEPTH(ft HOLENO.BH-6SHEETNO.-11...OF~(ACRES)052504(RaM)L~FC~E.REC.RUN(RQD)77(64)R141100592.8(80)to597.8R142100597.8(83)to602.6R143100602.6(65)to608.3R149100630.2(88)to631.8R14896625.2(92)to630.2R147 100620.2(lOa)to625.2R146 100615.4(96)to620.2R144100608.3(97)to611.5soft,numerousR145611.5to615.4ANCHORAGE,ALASKA613-615Alteredandfriable,healedjoints.Coreloss0.9'.625.2-630.2Coreloss0.2'.TYPEDESCRIPTION:GREPORTAHVDROELECTRICPRO....ECTASKAPOWERAUTHORITVaNorthAbutmentJOBNO.P5701.05CRESAMERICANINCORPORATED!--r>.-=...JONSULTINGENGINEERSUFFALO)NEWYORKHOLENO.BH-6SHEETNO.-11...OF~(ACRES)052504(RaM)L~FC~E.REC.RUN(RQD)77(64)R141100592.8(80)to597.8R142100597.8(83)to602.6R143100602.6(65)to608.3R149100630.2(88)to631.8R14896625.2(92)to630.2R147 100620.2(lOa)to625.2R146 100615.4(96)to620.2R144100608.3(97)to611.5soft,numerousR145611.5to615.4ANCHORAGE,ALASKA613-615Alteredandfriable,healedjoints.Coreloss0.9'.625.2-630.2Coreloss0.2'.TYPEDESCRIPTION:GREPORTAHVDROELECTRICPRO....ECTASKAPOWERAUTHORITVaNorthAbutmentJOBNO.P5701.05CRESAMERICANINCORPORATED!--r>.-=...JONSULTINGENGINEERSUFFALO)NEWYORK DRILLINGREPORTSUSITNAHVDROELECTRICPRO.JECTforALASKAPOWERAUTHORITVSITEWatanaNorthAbutmentJOBNO.P5701.05•• .ACRESAMERICANINCORPORATED'APoroCONSULTINGENGINEERSUn[dBUFFALOINEWYORKR155655.8to660.6R154650.0to655.8R156660.6to665.8R157665.8to670.8R158670.8to676.0HOLENO.SHEETNO.(ACRES).....Mccr~TANT••INC...........-.•T.~\,........._.u..v....alll.ANCHORAGE,ALASKALightgraytowhite,finetomediumgrained,nonfoliatedwithapproximately5%to10%mafics.Hard,freshandcompetent.Minorsulfidemineralizationthroughout.Numeroushealedfracturesandjoints,carbonatecoatingonjointscommon.Jointspacingclosetomoderatelyclosewithjointsorientedapproximately40°to60°tocoreaxis.646.7Jointfilledwithcrushedrock.DESCRIPTION:ROCKTYPEQuartzDiorite(cont'd)Granite650DEPTH(ft)676.0631.8DRILLINGREPORTSUSITNAHVDROELECTRICPRO.JECTforALASKAPOWERAUTHORITVSITEWatanaNorthAbutmentJOBNO.P5701.05••.ACRESAMERICANINCORPORATED'APoroCONSULTINGENGINEERSUn[dBUFFALOINEWYORKR155655.8to660.6R154650.0to655.8R156660.6to665.8R157665.8to670.8R158670.8to676.0HOLENO.SHEETNO.(ACRES).....Mccr~TANT••INC...........-.•T.~\,........._.u..v....alll.ANCHORAGE,ALASKALightgraytowhite,finetomediumgrained,nonfoliatedwithapproximately5%to10%mafics.Hard,freshandcompetent.Minorsulfidemineralizationthroughout.Numeroushealedfracturesandjoints,carbonatecoatingonjointscommon.Jointspacingclosetomoderatelyclosewithjointsorientedapproximately40°to60°tocoreaxis.646.7Jointfilledwithcrushedrock.DESCRIPTION:ROCKTYPEQuartzDiorite(cont'd)Granite650DEPTH(ft)676.0631.8 686.2-687.9Coreloss0.4'.HOLENO....B;.;,;H_-6~__SHEETNO..1.L-OF.2SL(ACRES)052504(RaM)L~FCORE.REC.RUN(RQO)R159100676.0(98)to680.6R160100680.6(94)to685.4R16184685.4(80)to687.9R162104687.9(89)to692.5R163104692.5(74)to697.5R164100697.5(92)to702.5R165100702.5(67)to707.4R166100707.4(94)to712.2R167102712.2(l00)to717.1686.2-712.2Shearzone,jointspacingveryclosetoclose,moderatelyh~rdtosoftandfriablelocally.Rockgenerallylesscompetent,minorsulfidemineralizationthroughout.Carbonatecommon.(686.2,690.0, 695.7,699.3, 704.0,708.2)Slickensideswithclaygouge,soft,friable.DESCRIPTION:REPORTAHVDROELECTRICPRO.JECTSKAPOWERAUTHORITVJOBNO.P570l.05RESAMERICANINCORPORATEDr-----....=-.JNSULTINGENGINEERS~~~I!.:T~~..!!...!~~FFALOINEWYORKANCHORAGE,AL.ASKA686.2-687.9Coreloss0.4'.HOLENO....B;.;,;H_-6~__SHEETNO..1.L-OF.2SL(ACRES)052504(RaM)L~FCORE.REC.RUN(RQO)R159100676.0(98)to680.6R160100680.6(94)to685.4R16184685.4(80)to687.9R162104687.9(89)to692.5R163104692.5(74)to697.5R164100697.5(92)to702.5R165100702.5(67)to707.4R166100707.4(94)to712.2R167102712.2(l00)to717.1686.2-712.2Shearzone,jointspacingveryclosetoclose,moderatelyh~rdtosoftandfriablelocally.Rockgenerallylesscompetent,minorsulfidemineralizationthroughout.Carbonatecommon.(686.2,690.0, 695.7,699.3, 704.0,708.2)Slickensideswithclaygouge,soft,friable.DESCRIPTION:REPORTAHVDROELECTRICPRO.JECTSKAPOWERAUTHORITVJOBNO.P570l.05RESAMERICANINCORPORATEDr-----....=-.JNSULTINGENGINEERS~~~I!.:T~~..!!...!~~FFALOINEWYORKANCHORAGE,AL.ASKA DRILLINGREPORTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEwatanaNorthAbutmentJOBNO.PS701.05HOLENO.BSHEETNO.20(ACRES)~':!.~T~~.!!\.~~ANCHORAGE,ALASKA722.0-727.1Coreloss0.1'.EndofholeDESCRIPTION:ROCKTYPEmACRESAMERICANINCORPORATEDAPO[OCONSULTINGENGINEERSunraBUFFALOINEWYORK740.4+-------+DEPTH(ft)717.1Grantie(cantId)DRILLINGREPORTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEwatanaNorthAbutmentJOBNO.PS701.05HOLENO.BSHEETNO.20(ACRES)~':!.~T~~.!!\.~~ANCHORAGE,ALASKA722.0-727.1Coreloss0.1'.EndofholeDESCRIPTION:ROCKTYPEmACRESAMERICANINCORPORATEDAPO[OCONSULTINGENGINEERSunraBUFFALOINEWYORK740.4+-------+DEPTH(ft)717.1Grantie(cantId) BEDROCKLOGSHOLENO.BH-6DATEJULY1980LOCATION---:N...:.;O::..;R...:..To,..:H-'---'-A..:.::S"-"U<-.;T'-"M'-'-'E::,:.N"'-T'----'WC!.:;A=:T-'='A"-'IN=A'--_o1605QUARTZDIORITEGRANO-DIORITEQUARTZDIORITEQUARTZMONZONITEHIGHLYFRACTUREDANDALTEREDFRACTUREDANDALTEREDHIGHLYALTLEREDANDWEATHEREDHIGHLYFRACTUREDHIGHLYFRACTUREDALTEREDZONESHEARZONESHEARZONEALTEREDZONEHIGHLYFRACTURED8WEATHEREDHIGHLYFRACTUREDHIGHLYFRACTUREDALTERED,WEATHEREDZONESHEARZONEHIGHLYFRACTUREDSHEARZONENUMBEROFJOINTSPER10FT.5101520REMARKS;t;;:t::t=l=t=:l=:t-TOPOFROCK----------,INCORPORATEDPERMEABILITY(xlem/sec.i3~10-510-310-1lE~AMERICAN180200220:I:l-ll.UJC2402602803203016034040608020140120100ACRESBEDROCKLOGSHOLENO.BH-6DATEJULY1980LOCATION---:N...:.;O::..;R...:..To,..:H..:-...:.A..:.::S"-"U<-.;T'-"M'-'-'E::,:.N"'-T'----'WC!.:;A=:T-'='A"-'IN=A'--_o1605QUARTZDIORITEGRANO-DIORITEQUARTZDIORITEQUARTZMONZONITEHIGHLYFRACTUREDANDALTEREDFRACTUREDANDALTEREDHIGHLYALTLEREDANDWEATHEREDHIGHLYFRACTUREDHIGHLYFRACTUREDALTEREDZONESHEARZONESHEARZONEALTEREDZONEHIGHLYFRACTURED8WEATHEREDHIGHLYFRACTUREDHIGHLYFRACTUREDALTERED,WEATHEREDZONESHEARZONEHIGHLYFRACTUREDSHEARZONENUMBEROFJOINTSPER10FT.5101520REMARKS;t;;:t::t=l=t=:l=:t-TOPOFROCK----------,INCORPORATEDPERMEABILITY(xlem/sec.i3~10-510-310-1lE~AMERICAN180200220:I:l-ll.UJC2402602803203016034040608020140120100ACRES CLAY,ALTEREDCLAYCLAYHEALEDJOINTS,AlJ'EREDSLICKSGOUGEALTEREDZONESHEARZONEHIGHLYFRACTURED,MINERALIZEDSOFT,MINERAUZEDFRACTUREDZONESUCKSNUMBEROFJOINTSPER10FT.5101520REMARKSINCORPORATEDAMERICAN>-'~'"'z~0:I:!iPERMEABILITYI->(xlem/sec.Q.LIJLIJ..J10-510-3QLIJ380440400420460480360520540560580600620640660zi=680UJ...ZBEDROCKLOGSHOLENO.BH-6DATEJULY1980LOCATIONNORTH'ABUTMENT-WATANAACRESCLAY,ALTEREDCLAYCLAYHEALEDJOINTS,AlJ'EREDSLICKSGOUGEALTEREDZONESHEARZONEHIGHLYFRACTURED,MINERALIZEDSOFT,MINERAUZEDFRACTUREDZONESUCKSNUMBEROFJOINTSPER10FT.5101520REMARKSINCORPORATEDAMERICAN>-'~'"'z~0:I:!iPERMEABILITYI->(xlem/sec.Q.LIJLIJ..J10-510-3QLIJ380440400420460480360520540560580600620640660zi=680UJ...ZBEDROCKLOGSHOLENO.BH-6DATEJULY1980LOCATIONNORTH'ABUTMENT-WATANAACRES BEDROCKLOGSHOLENO.BH-6DATEJULY1980LOCATION_N_O_R_T_H_A_B_U_T_M_E_N_T_-_W_AT_A_N_A_...z!:0:I:~PERMEABILITYCORERECOVERYNUMBEROF...(xlem/sec."'tuaRO.D.JOINTSPERIl.tuUQ.0/010FT.tu..J0>-0tu10-510-310-10:...204060805101520REMARKSA+•rooGOUGEv700+~SLICKSFRACTUREDLOCALLY.~+~SLICKSf+-GOUGESLICKSI~+720ft-0+z+740963.8740.4IENDOFHOLEACRESAMERICANINCORPORATEDQUARTZDIORITEBEDROCKLOGSHOLENO.BH-6DATEJULY1980LOCATION_N_O_R_T_H_A_B_U_T_M_E_N_T_-_W_AT_A_N_A_...z!:0:I:~PERMEABILITYCORERECOVERYNUMBEROF...(xlem/sec."'tuaRO.D.JOINTSPERIl.tuUQ.0/010FT.tu..J0>-0tu10-510-310-10:...204060805101520REMARKSA+•rooGOUGEv700+~SLICKSFRACTUREDLOCALLY.~+~SLICKSf+-GOUGESLICKSI~+720ft-0+z+740963.8740.4IENDOFHOLEACRESAMERICANINCORPORATEDQUARTZDIORITE WATERPRESSURETESTRESULTSB.H.-6WatanaElevation1605147feet~elowSurface60°NoneGaugeDurationCoefficientofPressureofTestFlowRatePermeability(psi)(min)(gpm)(em/sec)16to1810111.93x10-422to241010.81.76x10-428to30106.4to8-59.77x10To-41.22x109535to36102.43.44x10-541to44102.22.97x10-548to50102.93.64x10-554to5810-54.45.11x10To-55.29x1015561to62103.7to3.84.28x10-517066to68104.34.65x10-518576to78104.04.02x10-520082to84101.31.25x10-521592to98-5151.71.54x10To-51.49x10WATERPRESSURETESTRESULTSB.H.-6WatanaElevation1605147feet~elowSurface60°NoneGaugeDurationCoefficientofPressureofTestFlowRatePermeability(psi)(min)(gpm)(em/sec)16to1810111.93x10-422to241010.81.76x10-428to30106.4to8-59.77x10To-41.22x109535to36102.43.44x10-541to44102.22.97x10-548to50102.93.64x10-554to5810-54.45.11x10To-55.29x1015561to62103.7to3.84.28x10-517066to68104.34.65x10-518576to78104.04.02x10-520082to84101.31.25x10-521592to98-5151.71.54x10To-51.49x10 BoreholeBH;..6.,Watana-(Continued)DepthTestedGaugeDurationCoefficient0FromToPressureofTestFlowRatePermeability(feet)(feet)(psi)(min)(gpm)em/sec)213.923098to104101.22x10-1.4To1.18x10-228.9245108151.751.44x1243.9260114251.07.96x1258.9275125251.29.00x1273.9290125451.29.00x1288.9305130145.543.94x1303.9320140254.93.40x1318.9335140106.24.31x1333.93502001010to305.36x 1To1.61x 1348.936520050.31to14.71.66x 1To-57.89x10363.9380204-51015to307.93x10To-41.59x10378.9395-52021015to307.99x10To-41.60x10393.9410204106.63.49x10-5408.9425202103.752.00x10-5423.9440202105.73.03x10-5438.9455-52001511to305.90x10To-41.61x10453.9470-52001011to305.90x10To-41.61x10BoreholeBH;..6.,Watana-(Continued)DepthTestedGaugeDurationCoefficient0FromToPressureofTestFlowRatePermeability(feet)(feet)(psi)(min)(gpm)em/sec)213.923098to104101.22x10-1.4To1.18x10-228.9245108151.751.44x1243.9260114251.07.96x1258.9275125251.29.00x1273.9290125451.29.00x1288.9305130145.543.94x1303.9320140254.93.40x1318.9335140106.24.31x1333.93502001010to305.36x 1To1.61x 1348.936520050.31to14.71.66x 1To-57.89x10363.9380204-51015to307.93x10To-41.59x10378.9395-52021015to307.99x10To-41.60x10393.9410204106.63.49x10-5408.9425202103.752.00x10-5423.9440202105.73.03x10-5438.9455-52001511to305.90x10To-41.61x10453.9470-52001011to305.90x10To-41.61x10 Watana-(Continued)GaugeDurationCoefficientofPressureofTestFlowRatePermeabiIity(psi)(min)(gpm)(cm/sec)202-51511to305.86x10To-41.60x102001030-511to5.90x10To-41.61x10202157.84.15x10-5204157.53.96x10-5195155.22.84x10-5205153.82.00x10-5200151.457.78x10-6195105.22.84x10-5200158.54.56x10-5205102.951.55x10-5203103.351.78x10-519820.552.97x10-6Watana-(Continued)GaugeDurationCoefficientofPressureofTestFlowRatePermeabiIity(psi)(min)(gpm)(cm/sec)202-51511to305.86x10To-41.60x102001030-511to5.90x10To-41.61x10202157.84.15x10-5204157.53.96x10-5195155.22.84x10-5205153.82.00x10-5200151.457.78x10-6195105.22.84x10-5200158.54.56x10-5205102.951.55x10-5203103.351.78x10-519820.552.97x10-6 100(30)t0;'LENGTHCORE.OFREC.CRQOJRun17113.8(10)to18.0Run29118.0(22)to23.8Run39423.8(54)to28.8HOLENO.BH-8SHEETNO._l_OFl:2.-(ACRES)052504(RaM)withsiltandcobbles.NotAPPROVED(RaM)DATEAPPROVED---------(ACRES)DATEsandygravelintoangularRun4Someresidualinterstitialsand28.8to33.8ELEVATIONS:DATUMDRILLPLATFORM_GROUNDSURFACE_~1~9~7~6~ft~.~_ROCKSURFACE1964it.BOTTOMOFHOLE__-;:1~3:::.;26:::......!f""t....._WATERTABLE1960ft.DESCRIPTION:0.0-1.0Organicmaterials.1.0-8.0Brownboulders,gradingsampled.Weatheredbedrock.13.8-28.8Coreloss2.0'.13.833.8Moderatelytohighlyweathered,friablelocally.Penetrativeironstainingthroughout.Paletantogray,veryfinetofinegrainedgroundmasswithnumerouslightcoloredphenocrysts.Generallyhardtoveryhard,friablelocally.Slightlytomoderatelyweatheredwithironstainingonjointsurfacesandpenetrativestainingandweakeningupto1emimmediatelyadjacenttojoints.Lessweatheringwithdepth.Jointspacingveryclosetoclose.Occasionaljointshealedwithcarbonate.(13.8-18.0)andsilt.LATITUDEN62°49'11.686DEPARTURE_W_l_48_0~3-=2_'_17_._6_6_4BEARING60°INITIALDIP__..;;:;6.;:;.0°_OTHERDIPS_TheDrillingCompanySTARTED1:00p.M.7/2919~.FINISHEDM.8/91980SOILCasingAdvancerCASINGDIAM.NW4"LD.ROCKDiamondCoreDrillingCOREDIAM.NQ-3(1.75").GREPORTAHVDROELECTRICPRO.JECTASKAPOWERAUTHORITVSouthAbutmentJOBNO.P5701.05ACRESAMERICANINCORPORATED1...rD-....;..::::.....ICONSULTINGENGINEERS~'!:.~c:~~~~':T.e~.J~~!~£:UFFALOINEWYORKANCHORAGEIALASKA-~~....:.===-(RaM)FeldmanAcomb......-.-----(ACRES)100(30)t0;'LENGTHCORE.OFREC.CRQOJRun17113.8(10)to18.0Run29118.0(22)to23.8Run39423.8(54)to28.8HOLENO.BH-8SHEETNO._l_OFl:2.-(ACRES)052504(RaM)withsiltandcobbles.NotAPPROVED(RaM)DATEAPPROVED---------(ACRES)DATEsandygravelintoangularRun4Someresidualinterstitialsand28.8to33.8ELEVATIONS:DATUMDRILLPLATFORM_GROUNDSURFACE_~1~9~7~6~ft~.~_ROCKSURFACE1964it.BOTTOMOFHOLE__-;:1~3:::.;26:::......!f""t....._WATERTABLE1960ft.DESCRIPTION:0.0-1.0Organicmaterials.1.0-8.0Brownboulders,gradingsampled.Weatheredbedrock.13.8-28.8Coreloss2.0'.13.833.8Moderatelytohighlyweathered,friablelocally.Penetrativeironstainingthroughout.Paletantogray,veryfinetofinegrainedgroundmasswithnumerouslightcoloredphenocrysts.Generallyhardtoveryhard,friablelocally.Slightlytomoderatelyweatheredwithironstainingonjointsurfacesandpenetrativestainingandweakeningupto1emimmediatelyadjacenttojoints.Lessweatheringwithdepth.Jointspacingveryclosetoclose.Occasionaljointshealedwithcarbonate.(13.8-18.0)andsilt.LATITUDEN62°49'11.686DEPARTURE_W_l_48_0~3-=2_'_17_._6_6_4BEARING60°INITIALDIP__..;;:;6.;:;.0°_OTHERDIPS_TheDrillingCompanySTARTED1:00p.M.7/2919~.FINISHEDM.8/91980SOILCasingAdvancerCASINGDIAM.NW4"LD.ROCKDiamondCoreDrillingCOREDIAM.NQ-3(1.75").GREPORTAHVDROELECTRICPRO.JECTASKAPOWERAUTHORITVSouthAbutmentJOBNO.P5701.05ACRESAMERICANINCORPORATED1...rD-....;..::::.....ICONSULTINGENGINEERS~'!:.~c:~~~~':T.e~.J~~!~£:UFFALOINEWYORKANCHORAGEIALASKA-~~....:.===-(RaM)FeldmanAcomb......-.-----(ACRES) [ii]ACRESAMERICANINCORPORATEDIPD[~CONSULTINGENGINEERS"UOldBUFFALOINEWYORKRun63.6to68.0competent.withironHOLENO.BSHEETNO.2(ACRES)33.849.6RockbecomingmoreSlightlytomoderatelyweatheredstainingonjointsurfaces.33.8-38.8Coreloss0.3I •59.5-63.6Darkgrayfinegrainedbasaltdikecontaininginclusionsofbrecciated,altereddiorite,andcarbonateveins.Coreloss0.1'.Palepinktogreenishgray,finetomediumgrainedcrystallinerock.Non-foliated,approximately20%to30%mafics.Generallyhardtoveryhard,freshtoslightlyweathered,withironstainingonsomejointandfracturesurfaces.Carbonatecommonthroughout.Jointspacingveryclosetomoderatelyclose.Occasionaljointshealedwithcarbonate.49.665.0Moderatelyweatheredandalteredwithsomebleaching.Locallysoft,clayeyzones.(48.3-50.6)Sandyclaymaterialalongcontactwithunderlyingdiorite.Softandfriable.Coreloss1.5feet.DESCRIPTION:ROCKTYPEDiorite68.0DRILLINGREPORTSUSITNAHVDROELECTRICPRO.JECTforALASKAPOWERAUTHORITVSITEWatanaSouthAbutmentJOBNO.PS70l.0S49.633.8DEPTH(ft)[ii]ACRESAMERICANINCORPORATEDIPD[~CONSULTINGENGINEERS"UOldBUFFALOINEWYORKRun63.6to68.0competent.withironHOLENO.BSHEETNO.2(ACRES)33.849.6RockbecomingmoreSlightlytomoderatelyweatheredstainingonjointsurfaces.33.8-38.8Coreloss0.3I •59.5-63.6Darkgrayfinegrainedbasaltdikecontaininginclusionsofbrecciated,altereddiorite,andcarbonateveins.Coreloss0.1'.Palepinktogreenishgray,finetomediumgrainedcrystallinerock.Non-foliated,approximately20%to30%mafics.Generallyhardtoveryhard,freshtoslightlyweathered,withironstainingonsomejointandfracturesurfaces.Carbonatecommonthroughout.Jointspacingveryclosetomoderatelyclose.Occasionaljointshealedwithcarbonate.49.665.0Moderatelyweatheredandalteredwithsomebleaching.Locallysoft,clayeyzones.(48.3-50.6)Sandyclaymaterialalongcontactwithunderlyingdiorite.Softandfriable.Coreloss1.5feet.DESCRIPTION:ROCKTYPEDiorite68.0DRILLINGREPORTSUSITNAHVDROELECTRICPRO.JECTforALASKAPOWERAUTHORITVSITEWatanaSouthAbutmentJOBNO.PS70l.0S49.633.8DEPTH(ft) 89.3-91.6Highlyfractured,friablelocally.ANCHORAGE,ALASKAI.~FC~E.REC.RUN(RQD)Run110089.3(43)to91.6Run29691.6(60)to96.6Run2110096.6(l00)to101.0Run22100101.0(83)to106.2Run1410468.0(lOO)to73.0Run1510073.0(43)to77.7SomefaintRun110377.7(57)to80.7Run110080.7(57)to84.0Run1810084.0(64)to89.3HOLENO.BH-8SHEETNO._3_OF..12...(ACRES)052504(RaM)76.0Thinalteredzone.77. 789.0Highlyfractured.slickensides.91.6-96.6Coreloss0.2'.DESCRIPTION:RESAMERICANINCORPORATED1---------'NSULTINGENGINEERSFFALOINEWYORKREPORTAHVDROELECTRICPRO.JECTSKAPOWERAUTHORITVa.SouthAbutmentJOBNO.P5701.0589.3-91.6Highlyfractured,friablelocally.ANCHORAGE,ALASKAI.~FC~E.REC.RUN(RQD)Run110089.3(43)to91.6Run29691.6(60)to96.6Run2110096.6(l00)to101.0Run22100101.0(83)to106.2Run1410468.0(lOO)to73.0Run1510073.0(43)to77.7SomefaintRun110377.7(57)to80.7Run110080.7(57)to84.0Run1810084.0(64)to89.3HOLENO.BH-8SHEETNO._3_OF..12...(ACRES)052504(RaM)76.0Thinalteredzone.77. 789.0Highlyfractured.slickensides.91.6-96.6Coreloss0.2'.DESCRIPTION:RESAMERICANINCORPORATED1---------'NSULTINGENGINEERSFFALOINEWYORKREPORTAHVDROELECTRICPRO.JECTSKAPOWERAUTHORITVa.SouthAbutmentJOBNO.P5701.05 140.0Rockgenerallyfreshtobottomofhole.HOLENO.SHEETNO.4(ACRES)116.1-121.1Coreloss0.1'.DESCRIPTION:ROCKTYPEDiorite(cantId)129.0Faintslickensides.140.8-142.9Prominentjointsetsat25°and35°tocoreaxis.Coreloss2.1'.135.6-140.8Coreloss0.2'.123.0-124.0Highlyfracturedzone.alteredandbleached.146.0Slickensides.DRILLINGREPORTSUSITNAHYDROELECTRICPRO....ECTforALASKAPOWERAUTHORITYSITEWatanaSouthAbutmentJOBNO.P5701.05148.0[Ai]ACRESAMERICANINCORPORATEDAPD[PCONSULTINGENGINEERSUn[dBUFFALOINEWYORK106.2DEPTH(ft)140.0Rockgenerallyfreshtobottomofhole.HOLENO.SHEETNO.4(ACRES)116.1-121.1Coreloss0.1'.DESCRIPTION:ROCKTYPEDiorite(cantId)129.0Faintslickensides.140.8-142.9Prominentjointsetsat25°and35°tocoreaxis.Coreloss2.1'.135.6-140.8Coreloss0.2'.123.0-124.0Highlyfracturedzone.alteredandbleached.146.0Slickensides.DRILLINGREPORTSUSITNAHYDROELECTRICPRO....ECTforALASKAPOWERAUTHORITYSITEWatanaSouthAbutmentJOBNO.P5701.05148.0[Ai]ACRESAMERICANINCORPORATEDAPD[PCONSULTINGENGINEERSUn[dBUFFALOINEWYORK106.2DEPTH(ft) 87(52)98(91)91(88)100(70)un3910081.0(100)to85.9un33100152.6(100)to157.7un32100148.0(98)to152.6zonewithun37friable.171.9tolZ6.5HOLENO.BH-8SHEETNO._5_OF19(ACRES)052504(RaM)ANCHORAGE,A~ASKAun3592162.7(63)to167.596157.7-167.5Coreloss0.6'.(96)171.9 -173.6Alteredandbrecciatedclayandsandfilling.SoftandCalcareous.Coreloss0.6feet.185.9-194.2Coreloss0.6'.DESCRIPTION:GREPORTAHYDROELECTRICPRO....ECTASKAPOWERAUTHORITYaSouthAbutmentJOBNO.P5701.05RESAMERICANINCORPORATEDI--------JONSULTINGENGINEERSFFALOJNEWYORK87(52)98(91)91(88)100(70)un3910081.0(100)to85.9un33100152.6(100)to157.7un32100148.0(98)to152.6zonewithun37friable.171.9tolZ6.5HOLENO.BH-8SHEETNO._5_OF19(ACRES)052504(RaM)ANCHORAGE,A~ASKAun3592162.7(63)to167.596157.7-167.5Coreloss0.6'.(96)171.9 -173.6Alteredandbrecciatedclayandsandfilling.SoftandCalcareous.Coreloss0.6feet.185.9-194.2Coreloss0.6'.DESCRIPTION:GREPORTAHYDROELECTRICPRO....ECTASKAPOWERAUTHORITYaSouthAbutmentJOBNO.P5701.05RESAMERICANINCORPORATEDI--------JONSULTINGENGINEERSFFALOJNEWYORK •.ACRESAMERICANINCORPORATED1------rJ:=::::"":~··=-=--~.J\'lI~~U:rANT~;;~--~;;!APO[OCONSULTINGENGINEERS~~~.M..:!~~..!!.~!~~uoroBUFFALOINEWYORKANCHORAGE,AL.ASKADRILLINGREPORTSUSITNAHVDROELECTRICPRC.JeCTforALASKAPOWERAUTHORITVSITEWatanaSouthAbutmentJOBNO.P570l.05-laun41~89.to~94~un42194.to199.Run43199.to20l.laun44120l.to1206.minorlRun~51206.to1211./RunIEt2ll.to1215./Run~71215.totz19.~un48~19.tot22l.alteration,~unI~D2l.to~25.HOLENO.BH-8~SHEETNO.--2-0F(ACRES)052504(~206.2-211.0,213.0Somealterationandsulfidemineralization.221.2-225.4Somehydrothermallocallyfracturedandfriable.DESCRIPTION:ROCKTYPEDiorite(cantId)DEPTH(ft)225.4189.2•.ACRESAMERICANINCORPORATED1------rJ:=::::"":~··=-=--~.J\'lI~~U:rANT~;;~--~;;!APO[OCONSULTINGENGINEERS~~~.M..:!~~..!!.~!~~uoroBUFFALOINEWYORKANCHORAGE,AL.ASKADRILLINGREPORTSUSITNAHVDROELECTRICPRC.JeCTforALASKAPOWERAUTHORITVSITEWatanaSouthAbutmentJOBNO.P570l.05-laun41~89.to~94~un42194.to199.Run43199.to20l.laun44120l.to1206.minorlRun~51206.to1211./RunIEt2ll.to1215./Run~71215.totz19.~un48~19.tot22l.alteration,~unI~D2l.to~25.HOLENO.BH-8~SHEETNO.--2-0F(ACRES)052504(~206.2-211.0,213.0Somealterationandsulfidemineralization.221.2-225.4Somehydrothermallocallyfracturedandfriable.DESCRIPTION:ROCKTYPEDiorite(cantId)DEPTH(ft)225.4189.2 238.0Slightlyaltered,bleachedandsomewhatRun52100softer.235.6(91)to240.9C~E.REC.(RQO)Run5100225.4(100)to230.6Run5196230.6(96)to235.6Run5100240.9(100)to245.6Run598245.6(87)to251.0Run5100251.0(93)to255.2Run5100255.2(100)to260.1Run57100260.1(84)to265.1Run58100265.1(90)to270.1HOLENO.BH-8SHEETNO._7_OFJ:.2...(ACRES)052504(RaM)ANCHORAGE,ALASKA230.6-235.6Coreloss0.2'.245.6-251.0Coreloss0.1'.251.0Thinclayseam.261.5,270.0Highlyfracturedzones.OESCRIPTION:REPORTHYDROELECTRICPRO.JECTSKAPOWERAUTHORITYSouthAbutmentJOBNO.P5701.05RESAMERICANINCORPORATEDt-------JNSULTINGENGINEERSFFALOINEWYORK238.0Slightlyaltered,bleachedandsomewhatRun52100softer.235.6(91)to240.9C~E.REC.(RQO)Run5100225.4(100)to230.6Run5196230.6(96)to235.6Run5100240.9(100)to245.6Run598245.6(87)to251.0Run5100251.0(93)to255.2Run5100255.2(100)to260.1Run57100260.1(84)to265.1Run58100265.1(90)to270.1HOLENO.BH-8SHEETNO._7_OFJ:.2...(ACRES)052504(RaM)ANCHORAGE,ALASKA230.6-235.6Coreloss0.2'.245.6-251.0Coreloss0.1'.251.0Thinclayseam.261.5,270.0Highlyfracturedzones.OESCRIPTION:REPORTHYDROELECTRICPRO.JECTSKAPOWERAUTHORITYSouthAbutmentJOBNO.P5701.05RESAMERICANINCORPORATEDt-------JNSULTINGENGINEERSFFALOINEWYORK 308.8307.8 308.8Highlyfractured,moderatelyweathered,soft.HOLENO.BSHEETNO.8(ACRES)~~~~.":T~~!.I.!~ANCHORAGE,ALASKA284.4-287.8Coreloss0.1'.DESCRIPTION:ROCKTYPE287.8-291.0MislatchofcorebarrelduringRundrilling.Corebadlyground.Coreloss2870.8feet.to291DRILLINGREPORTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEWatanaSouthAbutmentJOBNO.P5701.05[Ai]ACRESAMERICANINCORPORATEDIPO[PCONSULTINGENGINEERSIIUn[dBUFFALOINEWYORK270.1Diorite(cont'd)DEPTH(ft)308.8307.8 308.8Highlyfractured,moderatelyweathered,soft.HOLENO.BSHEETNO.8(ACRES)~~~~.":T~~!.I.!~ANCHORAGE,ALASKA284.4-287.8Coreloss0.1'.DESCRIPTION:ROCKTYPE287.8-291.0MislatchofcorebarrelduringRundrilling.Corebadlyground.Coreloss2870.8feet.to291DRILLINGREPORTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEWatanaSouthAbutmentJOBNO.P5701.05[Ai]ACRESAMERICANINCORPORATEDIPO[PCONSULTINGENGINEERSIIUn[dBUFFALOINEWYORK270.1Diorite(cont'd)DEPTH(ft) 97(97)100(90)100(93)100(92)100(58)o48.4.'";'un68100308.8(93)to313.2un70100318.2(94)to321.5un71100321.5(loa)to326.9un69100313.2(100)to318.2HOLENO.BH-8SHEETNO._9_OF.22(ACRES)052504(RaM)ANCHORAGE,ALASKA324.5Thinfelsicdike.Palegreentopinkandgray,finetomediumgrainedcrystallinerock.Non-foliatedwithapproximately20%mafics.Hardtoveryhard,freshandgenerallycompetent.Jointspacingclosetomoderatelyclose.Occasionalcarbonatecoating.326.9-330.8Coreloss0.11•Graytopalegreenandpink,finetomediumgrainedcrystallinerock.Non-foliatedwith20%to30%mafics.Hardtoveryhard,fresh.Generallycompetent.Minorsulfidemineraliza-tion.Jointspacingveryclosetomoderatelyclose.Occasionaljointshealedwithcalcite.332.4-332.8Felsicdike.343.2-375.5Localizeddikesandveinsofgray,finegrainedandesite.341.0-344.0Highlyfracturedzone.OESCRIPTJON:RESAMERICANINCORPORATEDt-------'NSULTINGENGINEERSFFALOINEWYORKGREPORTAHVDROELECTRICPRO..JECTSKAPOWERAUTHORITVSouthAbutme:ntJOBNO.P5701.0597(97)100(90)100(93)100(92)100(58)o48.4.'";'un68100308.8(93)to313.2un70100318.2(94)to321.5un71100321.5(loa)to326.9un69100313.2(100)to318.2HOLENO.BH-8SHEETNO._9_OF.22(ACRES)052504(RaM)ANCHORAGE,ALASKA324.5Thinfelsicdike.Palegreentopinkandgray,finetomediumgrainedcrystallinerock.Non-foliatedwithapproximately20%mafics.Hardtoveryhard,freshandgenerallycompetent.Jointspacingclosetomoderatelyclose.Occasionalcarbonatecoating.326.9-330.8Coreloss0.11•Graytopalegreenandpink,finetomediumgrainedcrystallinerock.Non-foliatedwith20%to30%mafics.Hardtoveryhard,fresh.Generallycompetent.Minorsulfidemineraliza-tion.Jointspacingveryclosetomoderatelyclose.Occasionaljointshealedwithcalcite.332.4-332.8Felsicdike.343.2-375.5Localizeddikesandveinsofgray,finegrainedandesite.341.0-344.0Highlyfracturedzone.OESCRIPTJON:RESAMERICANINCORPORATEDt-------'NSULTINGENGINEERSFFALOINEWYORKGREPORTAHVDROELECTRICPRO..JECTSKAPOWERAUTHORITVSouthAbutme:ntJOBNO.P5701.05 DRILLINGREPORTSUSITNAHYDROELECTRICPRC.JECTforALASKAPOWERAUTHORITYSITEWatanaSouthAbutmentJOBNO.P5701.05[Ai]ACRESAMERICANINCORPORATEDIPO[PCONSULTINGENGINEERSftUO[dBUFFALOINEWYORKHOLENO.BSHEETNO.1(ACRES)IIlI&Mcar-.LTANT.INc..............~_I.T.~........eu1.v.vocuillANCHORAGE,ALASKA364.2-365.5Coreloss0.1'.DESCRIPTION:ROCKTYPE384.0DEPTH(ft)348.4Diorite(cont'd)DRILLINGREPORTSUSITNAHYDROELECTRICPRC.JECTforALASKAPOWERAUTHORITYSITEWatanaSouthAbutmentJOBNO.P5701.05[Ai]ACRESAMERICANINCORPORATEDIPO[PCONSULTINGENGINEERSftUO[dBUFFALOINEWYORKHOLENO.BSHEETNO.1(ACRES)IIlI&Mcar-.LTANT.INc..............~_I.T.~........eu1.v.vocuillANCHORAGE,ALASKA364.2-365.5Coreloss0.1'.DESCRIPTION:ROCKTYPE384.0DEPTH(ft)348.4Diorite(cont'd) zone,softandR86infillingalong384.0to389.0ANCHORAGE,ALASKA102(46)L~FC~E.REC.RUN(RQD)R91100407.8(58)to411.9R92100411.9(96)to417.1R93100417.1(90)to421.0R94100421.0(96)to426.4R87100389.0(86)to393.4R88100393.4(100)to397.7R89100397.7(96)to402.3soft,andR9093402.3(45)to407.8HOLENO.BH-8SHEETNO.-lLOF.1..2..(ACRES)052504(RaM)shearsandPossibleclayand384.0-386.0friablewithjoints.406.0408.7Alterationzone,friable.Coreloss0.4feet.DESCRIPTION:GREPORTAHVDROELECTRICPRO.JECTASKAPOWERAUTHORITVaSouthAbutmentJOBNO.P570l.05CRESAMERICANINCORPORATEDt------..r-...:::.....iONSULTINGENGINEERSFFALOINEWYORKzone,softandR86infillingalong384.0to389.0ANCHORAGE,ALASKA102(46)L~FC~E.REC.RUN(RQD)R91100407.8(58)to411.9R92100411.9(96)to417.1R93100417.1(90)to421.0R94100421.0(96)to426.4R87100389.0(86)to393.4R88100393.4(100)to397.7R89100397.7(96)to402.3soft,andR9093402.3(45)to407.8HOLENO.BH-8SHEETNO.-lLOF.1..2..(ACRES)052504(RaM)shearsandPossibleclayand384.0-386.0friablewithjoints.406.0408.7Alterationzone,friable.Coreloss0.4feet.DESCRIPTION:GREPORTAHVDROELECTRICPRO.JECTASKAPOWERAUTHORITVaSouthAbutmentJOBNO.P570l.05CRESAMERICANINCORPORATEDt------..r-...:::.....iONSULTINGENGINEERSFFALOINEWYORK DRILLINGREPORTSUSITNAHYDRDELECTRICPRD..JECTforALASKAPDWERAUTHDRITYSITEWatanaSouthAbutmentJOBNO.P5701.05clayR433to436HOLENO.BSHEETNO.1(ACRES)052504~aMCCI'.-u!-TANT.INc.•..........-....._••T....A".......u'.v.volllaANCHORAGE,ALASKA430.4to436.0Highlyfracturedandalteredzone,friablewithsomechloritizedjoints.Coreloss0.7feet.440.0-443.5Highlyfracturedandshearedzone.Coreloss0.3feet.446.0-451.0Coreloss0.7feet.(435.6)Shearzone,rockbrecciatedwithgo~ge,verysoft.Coreloss0.2'.DESCRIPTION:[ii]ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUD[dBUFFALOINEWYORKDEPTHROCKTYPE(ft)465.4426.4Diorite(cant'd)DRILLINGREPORTSUSITNAHYDRDELECTRICPRD..JECTforALASKAPDWERAUTHDRITYSITEWatanaSouthAbutmentJOBNO.P5701.05clayR433to436HOLENO.BSHEETNO.1(ACRES)052504~aMCCI'.-u!-TANT.INc.•..........-....._••T....A".......u'.v.volllaANCHORAGE,ALASKA430.4to436.0Highlyfracturedandalteredzone,friablewithsomechloritizedjoints.Coreloss0.7feet.440.0-443.5Highlyfracturedandshearedzone.Coreloss0.3feet.446.0-451.0Coreloss0.7feet.(435.6)Shearzone,rockbrecciatedwithgo~ge,verysoft.Coreloss0.2'.DESCRIPTION:[ii]ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUD[dBUFFALOINEWYORKDEPTHROCKTYPE(ft)465.4426.4Diorite(cant'd) 100(81)96(90)100(100)100(100)100(100)10410065.4(89)to67.210510067.2(l00)to70.210610070.2(90)to75.4100(90)L~FC~E.REC.RUN(RQD)HOLENO.BH-8SHEETNO.--l.L0 F~(ACRES)052504(RaM)491.5-495.0Alteredzone,soft,coreloss0.2feet.476.6-476.9Alteredzonesoft,friable.DESCRIPTION:RESAMERICANINCORPORATEDt--------JNSULTINGENGINEERS~~.:r~~.J!.,,!~FFALOINEWYORKANCHORAGE,ALASKAREPORTAHVDROELECTRICPRO....ECTSKAPOWERAUTHORITVaSoU"t~hAbutmentJOBNO.P5701.05100(81)96(90)100(100)100(100)100(100)10410065.4(89)to67.210510067.2(l00)to70.210610070.2(90)to75.4100(90)L~FC~E.REC.RUN(RQD)HOLENO.BH-8SHEETNO.--l.L0 F~(ACRES)052504(RaM)491.5-495.0Alteredzone,soft,coreloss0.2feet.476.6-476.9Alteredzonesoft,friable.DESCRIPTION:RESAMERICANINCORPORATEDt--------JNSULTINGENGINEERS~~.:r~~.J!.,,!~FFALOINEWYORKANCHORAGE,ALASKAREPORTAHVDROELECTRICPRO....ECTSKAPOWERAUTHORITVaSoU"t~hAbutmentJOBNO.P5701.05 510.2-515.6Coreloss0.1'.546.3HOLENO.BSHEETNO.(ACRES)",aM~TANT••INC..........-~_I.T.""'ANN_au_v.vo••ANCHORAGE,ALASKAOESCRIPTION:ROCKTYPE(515.6-518.6)Softandfriable.505.2-520.6Alteredzone,bleached,sulfidemineralization.DRILLINGREPORTSUBITNAHYDROELECTRICPRO....ECTforALASKAPOWERAUTHORITYSITEWatanaSouthAbutmentJOBNO.P570l.05[iiJ.ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUn[dBUFFALO,NEWYORK465.4Diorite(cont'd)510.2-515.6Coreloss0.1'.546.3HOLENO.BSHEETNO.(ACRES)",aM~TANT••INC..........-~_I.T.""'ANN_au_v.vo••ANCHORAGE,ALASKAOESCRIPTION:ROCKTYPE(515.6-518.6)Softandfriable.505.2-520.6Alteredzone,bleached,sulfidemineralization.DRILLINGREPORTSUBITNAHYDROELECTRICPRO....ECTforALASKAPOWERAUTHORITYSITEWatanaSouthAbutmentJOBNO.P570l.05[iiJ.ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUn[dBUFFALO,NEWYORK465.4Diorite(cont'd) 100(50)L~FC~E.REC.RUN(RQD)R125100556.4(42)to561.2R126100561.2(100)to566.2R127100566.2(89)to571.6128100571.6(95)to575.4R122100546.3(100)to551.2R124 100552.6(50)to556.4and129100575.4(loa)to580.5130100580.5(96)to585.6HOLENO.BH-8SHEETNO.--22..OF19(ACRES)052504(RaM)HighlyfracturedR123551.2to552.6551.2-552.6,664.0-556.4zones.571.6-596.0Alteredzone,sulfidemineraliza-tion.(580.0-580.5,587.6)Highlyaltered,softfriablewithsomecarbonaceousclayfilling.DESCRIPTION:GREPORTAHVDRCELECTRICPRO-.JECTASKAPOWERAUTHORITVJOBNO.P5701.asACRESAMERICANINCORPORATED1---(::5)'3...~VA-----------1CONSULTINGENGINEERS~~~,!;T~~..!!.\'!~UFFALOINEWYORKANCHORAGEtALASKA100(50)L~FC~E.REC.RUN(RQD)R125100556.4(42)to561.2R126100561.2(100)to566.2R127100566.2(89)to571.6128100571.6(95)to575.4R122100546.3(100)to551.2R124 100552.6(50)to556.4and129100575.4(loa)to580.5130100580.5(96)to585.6HOLENO.BH-8SHEETNO.--22..OF19(ACRES)052504(RaM)HighlyfracturedR123551.2to552.6551.2-552.6,664.0-556.4zones.571.6-596.0Alteredzone,sulfidemineraliza-tion.(580.0-580.5,587.6)Highlyaltered,softfriablewithsomecarbonaceousclayfilling.DESCRIPTION:GREPORTAHVDRCELECTRICPRO-.JECTASKAPOWERAUTHORITVJOBNO.P5701.asACRESAMERICANINCORPORATED1---(::5)'3...~VA-----------1CONSULTINGENGINEERS~~~,!;T~~..!!.\'!~UFFALOINEWYORKANCHORAGEtALASKA R137612.4to617.6R138617.6to621.0R139621.0to626.2HOLENO.BHSHEETNO.16(ACRES)052504.....MCC'....,._TANT.INC.•.......-......_••T••,,"'.......1lU....,.va••ANCHORAGE,ALASKA(619.6,633.3)Slickensides.DESCRIPTION:ROCKTYPE(592.2)Brecciatedzone.Coreloss0.1'.609.0-634.0Highlyfracturedzone,withclayeyRfillingalongsomejoints,numerousjointshealed609.0withcarbonate.Coreloss0.1'.to612.4DRILLINGREPORTSUSITNAHVCRCELECTRICPRC..JECTforALASKAPCWERAUTHCRITVSITEWatanaSouthAbutmentJOBNO.P5701.05[Ai]ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERS-UO[dBUFFALOINEWYORK626.2585.6Diorite(cant'd)DEPTH(ft)R137612.4to617.6R138617.6to621.0R139621.0to626.2HOLENO.BHSHEETNO.16(ACRES)052504.....MCC'....,._TANT.INC.•.......-......_••T••,,"'.......1lU....,.va••ANCHORAGE,ALASKA(619.6,633.3)Slickensides.DESCRIPTION:ROCKTYPE(592.2)Brecciatedzone.Coreloss0.1'.609.0-634.0Highlyfracturedzone,withclayeyRfillingalongsomejoints,numerousjointshealed609.0withcarbonate.Coreloss0.1'.to612.4DRILLINGREPORTSUSITNAHVCRCELECTRICPRC..JECTforALASKAPCWERAUTHCRITVSITEWatanaSouthAbutmentJOBNO.P5701.05[Ai]ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERS-UO[dBUFFALOINEWYORK626.2585.6Diorite(cant'd)DEPTH(ft) ANCHORAGE,ALASKAL~FC~E.REC.RUN(RQD)140100626.2(69)to628.8141100628.8(75)to634.0142100634.0(98)to639.3143100639.3(95)to43.5144100grained43.5(94)andsoftto48.814510048.8(100)to53.814610053.8(100)to59.114710059.1(94)to64.1148100664.1(100)to669.4HOLENO.BH-8SHEETNO.-l1..0F.JL(ACRES)0525"04(RaM)643.5648.8Mediumtocoarsebrecciatedrockwithclaygouge,friablelocally,partiallyhealedwithcarbonate.DESCRIPTION:REPORTAHYDROELECTRICPRO.JECTSKAPOWERAUTHORITYSouthAbutmentJOBNO.P5701.05RESAMERICANINCORPORATED~--r~":.;..JONSULTINGENGINEERSUFFALOINEWYORKANCHORAGE,ALASKAL~FC~E.REC.RUN(RQD)140100626.2(69)to628.8141100628.8(75)to634.0142100634.0(98)to639.3143100639.3(95)to43.5144100grained43.5(94)andsoftto48.814510048.8(100)to53.814610053.8(100)to59.114710059.1(94)to64.1148100664.1(100)to669.4HOLENO.BH-8SHEETNO.-l1..0F.JL(ACRES)0525"04(RaM)643.5648.8Mediumtocoarsebrecciatedrockwithclaygouge,friablelocally,partiallyhealedwithcarbonate.DESCRIPTION:REPORTAHYDROELECTRICPRO.JECTSKAPOWERAUTHORITYSouthAbutmentJOBNO.P5701.05RESAMERICANINCORPORATED~--r~":.;..JONSULTINGENGINEERSUFFALOINEWYORK DRILLINGREPORTSUSITNAHVDROELECTRICPRO....ECTforALASKAPOWERAUTHORITVSITEWatanaSouthAbutmentJOBNO.P5701.05•ACRESAMERICANINCORPORATEDAPDIOCONSULTINGENGINEERSundBUFFALOINEWYORKHOLENO.SHEETNO.(ACRES)",aMCCF.-A.TANTSINc..__..._••.,...L........._.u....,.vc".ANCHORAGE,ALASKA690.2-693.0Mislatchofcorebarreldrilling,corebadlyground.Core'loss0.4669.4674.7Localizedclayfillingjoints.Coreloss0.3feet.DESCRIPTION:ROCKTYPEDEPTH(ft)669.4Diorite(cantId)713.1DRILLINGREPORTSUSITNAHVDROELECTRICPRO....ECTforALASKAPOWERAUTHORITVSITEWatanaSouthAbutmentJOBNO.P5701.05•ACRESAMERICANINCORPORATEDAPDIOCONSULTINGENGINEERSundBUFFALOINEWYORKHOLENO.SHEETNO.(ACRES)",aMCCF.-A.TANTSINc..__..._••.,...L........._.u....,.vc".ANCHORAGE,ALASKA690.2-693.0Mislatchofcorebarreldrilling,corebadlyground.Core'loss0.4669.4674.7Localizedclayfillingjoints.Coreloss0.3feet.DESCRIPTION:ROCKTYPEDEPTH(ft)669.4Diorite(cantId)713.1 96(79)100(82)L~Fco'ftE.REC.RUN(RQO)R160100724.7(98)to729.3R161100729.3(100)to734.3164100744.3(80)to749.4165749.4to750.5R162 102734.3(98)to739.3R163104739.3(90)to744.3locallyR159719.4to724.7HOLENO.BH-8SHEETNO.~0F..JJL(ACRES)052504(RaM)713.1-719.4Mis1atchofcorebarrelduringdrilling,corebadlyground,coreloss0.6feetR15890somecarbonaceousclayalongjoints.713.1(59)to719.4719.4-724.7Alteredzone,bleached,softandfriable,pitted.Coreloss0.2'.749.4Soft,friablezone.DESCRIPTION:REPeRTHYDROELECTRICPRO-JECTaKAPOWERAUTHORITYsouthAbutmentJOBNO.P5701.05ESAMERICANINCORPORATEDt--rD~...~ULTINGENGINEERS~c:E!~""':T~~.!!.,,!~FALOINEWYORKANCHORAGE,ALASKA------1-EndofHole96(79)100(82)L~Fco'ftE.REC.RUN(RQO)R160100724.7(98)to729.3R161100729.3(100)to734.3164100744.3(80)to749.4165749.4to750.5R162 102734.3(98)to739.3R163104739.3(90)to744.3locallyR159719.4to724.7HOLENO.BH-8SHEETNO.~0F..JJL(ACRES)052504(RaM)713.1-719.4Mis1atchofcorebarrelduringdrilling,corebadlyground,coreloss0.6feetR15890somecarbonaceousclayalongjoints.713.1(59)to719.4719.4-724.7Alteredzone,bleached,softandfriable,pitted.Coreloss0.2'.749.4Soft,friablezone.DESCRIPTION:REPeRTHYDROELECTRICPRO-JECTaKAPOWERAUTHORITYsouthAbutmentJOBNO.P5701.05ESAMERICANINCORPORATEDt--rD~...~ULTINGENGINEERS~c:E!~""':T~~.!!.,,!~FALOINEWYORKANCHORAGE,ALASKA------1-EndofHole DIORITEANDESITEHIGHLYWEATHEREDSLICKSSOFT,FRACTUREDALTERED,FRACTUREDSLICKSBRECCIA,CLAYFRIABLECLAYDIKEDIKEFRACTUREDZONEFRACTUREDZONENUMBEROFJOINTSPER10FT.5101520REMARKSHIGHLYFRACTUREDIL\..tQ-W-l--1-!-----.....JINCORPORATED-++-l-.j-"\7'~+:A-:""''''-+-l---1'-+-+-'''''CLAY-SAND--------1FRACTUREDZONEDIKEPERMEABILITYCORERECOVERY(Xlem/sec.~~a.~Q.D.10-510-310-1~~2040°6080AMERICANzoi=~'"..J'"40208010012060160140280200180260320220340300240BEDROCKLOGSHOLENO.BH- 8DATEJULY1980LOCATION_~SO~U:!...T!...!.H..!-..!A::l!:B~U:!-JT!.-"M!.!..!E:.!.N:!..!T!.....--_W!!.A!:!.T.L!A:l!.N.!!A~_-!LQ-\:==:l=~::;:=t=;::l=t~t=;::;::=t==l==I=::;:~=*~=t-TOPOFROCK--,------....,ACRESDIORITEANDESITEHIGHLYWEATHEREDSLICKSSOFT,FRACTUREDALTERED,FRACTUREDSLICKSBRECCIA,CLAYFRIABLECLAYDIKEDIKEFRACTUREDZONEFRACTUREDZONENUMBEROFJOINTSPER10FT.5101520REMARKSHIGHLYFRACTUREDIL\..tQ-W-l--1-!-----.....JINCORPORATED-++-l-.j-"\7'~+:A-:""''''-+-l---1'-+-+-'''''CLAY-SAND--------1FRACTUREDZONEDIKEPERMEABILITYCORERECOVERY(Xlem/sec.~~a.~Q.D.10-510-310-1~~2040°6080AMERICANzoi=~'"..J'"40208010012060160140280200180260320220340300240BEDROCKLOGSHOLENO.BH- 8DATEJULY1980LOCATION_~SO~U:!...T!...!.H..!-..!A::l!:B~U:!-JT!.-"M!.!..!E:.!.N:!..!T!.....--_W!!.A!:!.T.L!A:l!.N.!!A~_-!LQ-\:==:l=~::;:=t=;::l=t~t=;::;::=t==l==I=::;:~=*~=t-TOPOFROCK--,------....,ACRES BEDROCKLOGSHOLENO.BH- 8DATEJULY1980LOCATIOf\!--=S:.:::O.=.UT...:..;H:..:.....:...A.:.=B-=U...:.T:.:..M=-=E::...:N...:.T_---:..:W:..:..A:...:.T.:...;A:.:..:N.:...;A~_SOFT,FRIABLESOFTFRIABLESOFT,FRIABLESHEARZONEALT.EREDZONEHIGHLYFRACTUREDNUMBEROFJOINTSPER10FT.5101520REMARKSI-+-++-+-/'"BRECCIA,GOUGE1-+--1--1--+-11ILOCALIZEDCLAYFILLING1-+--!--I-4--I.SOFT,FRIABLESOFT.J-i.-I--+--+--+--,I-.f'BRECCIAAl.,4-1-l--!--I--l..FRACTUREDSHEARZONE,GOUGE..,QI--I-+-+--l---lSHEARZONE1:-1-+,£1---+-+-+--1--1-SLICKSHIGHLYFRACTUREDZONEFRACTURED~-l-:--!--!--+--iI-i:;...;S~L:!:IC,,-!K~S!.-__--IINCORPORATEDPERMEABILITY(xlem/sec.10-510-3AMERICAN460480500400360440420380640540580560620660600680ACRESBEDROCKLOGSHOLENO.BH- 8DATEJULY1980LOCATIOf\!--=S:.:::O.=.UT...:..;H:..:.....:...A.:.=B-=U...:.T:.:..M=-=E::...:N...:.T_---:..:W:..:..A:...:.T.:...;A:.:..:N.:...;A~_SOFT,FRIABLESOFTFRIABLESOFT,FRIABLESHEARZONEALT.EREDZONEHIGHLYFRACTUREDNUMBEROFJOINTSPER10FT.5101520REMARKSI-+-++-+-/'"BRECCIA,GOUGE1-+--1--1--+-111LOCALIZEDCLAYFILLING1-+--!--I-4--I.SOFT,FRIABLESOFT.J-i.-I--+--+--+--,I-.fBRECCIA.,4,l.,4-1-l--!--I--l..FRACTUREDSHEARZONE,GOUGE..,QI--I-+-+--l---lSHEARZONE1:-1-+,£1---+-+-+--1--1-SLICKSHIGHLYFRACTUREDZONEFRACTURED~-l-:--!--!--+--iI-i:;...;S~L:!:IC,,-!K~S!.-__--IINCORPORATEDPERMEABILITY(xlem/sec.10-510-3AMERICAN460480500400360440420380640540580560620660600680ACRES BEDROCKLOGSHOLENO.BH- 8DATEJULY1980LOCATIONSOUTH·ABUTMENT-WATANA...z~0:t:i=PERMEABILITYCORERECOVERYNUMBEROF...~(xlem/sec."'LUaR.O.D.JOINTSPER<l.LUuc..0/010FT.LU..J0>-0LU10-510-310-1a:...204060805101520REMARKS700<V10-.,....~..,.,...720"I-<~~SOFT,FRIABLE~740..<"1326"•SOFT,FRIABLEENDOFHOLE760IACRESAMERICANINCORPORATEDDIORITEBEDROCKLOGSHOLENO.BH- 8DATEJULY1980LOCATIONSOUTH·ABUTMENT-WATANA...z~0:t:i=PERMEABILITYCORERECOVERYNUMBEROF...~(xlem/sec."'LUaR.O.D.JOINTSPER<l.LUuc..0/010FT.LU..J0>-0LU10-510-310-1a:...204060805101520REMARKS700<V10-.,....~..,.,...720"I-<~~SOFT,FRIABLE~740..<"1326"•SOFT,FRIABLEENDOFHOLE760IACRESAMERICANINCORPORATEDDIORITE Elevation1976OFWATERPRESSURETESTRESULTSB.H.- 8WatanaNone15feet:(vertical)60°LevelGaugeDurationFlowCoefficientofPressureofTestRatePermeability(psi)(min)(gpm)(em/sec)4820134.552.41x10-46325202.19.36x10-578315.341.27x10-59338104.01.26x10-410845156.21.69x10-412351203.27.84x10-51385710.81.78x10-51536453.26.40x10-51687096.61.22x10-418377103.05.07x10-51988410.385.92x10-621390101.21.75x10-524310483.74.73x10-5258110610.31.25x10-427311657.58.64x10-52885067.01.74x10-430350....3.859.60x10-5I3185062.957.35x10-533314257.87.42x10-5Elevation1976OFWATERPRESSURETESTRESULTSB.H.- 8WatanaNone15feet:(vertical)60°LevelGaugeDurationFlowCoefficientofPressureofTestRatePermeability(psi)(min)(gpm)(em/sec)4820134.552.41x10-46325202.19.36x10-578315.341.27x10-59338104.01.26x10-410845156.21.69x10-412351203.27.84x10-51385710.81.78x10-51536453.26.40x10-51687096.61.22x10-418377103.05.07x10-51988410.385.92x10-621390101.21.75x10-524310483.74.73x10-5258110610.31.25x10-427311657.58.64x10-52885067.01.74x10-430350....3.859.60x10-5I3185062.957.35x10-533314257.87.42x10-5 Watana•(Continued)DepthTestedGaugeDurationFlowCoefficient0FromToPressureofTestRatePermeabil(feet)(feet)(psi)(min)(gpm)(em/sec)331.934814957.36.63x10.5346.936315562.452.14x10.5361.937816252.752.31x10.5376.93931503512.71.15x10.4391.94081104010.91.32x10.4406.94235051.74.24x10-5421.94381886.42.91x10-6436.94531955.241.68x10.6451.94682008.362.46x10-6466.94832006.543.70x10.6481.94982007.543.70x10.6496.95132007.604.11x10-6511.95282005.553.76x10-6526.95432005.966.57x10-6541.95582006.855.82x10-6556.95732006.765.20x10-6571.958820072.051.40x10.5586.96032006.855.82x10-6601.961820072.81.92x10-5616.96332006.755.13x10.6631.96482006.825.61x10-6646.966322581.609.77x10-6661.96782006.805.47x10-6669.967120071.17.53x10.6691.970820061.087.39x10.6706.972320061.28.21x10-6721.9738200121.06.84x10.6BoreholeBH-8Watana•(Continued)DepthTestedGaugeDurationFlowCoefficient0FromToPressureofTestRatePermeabil(feet)(feet)(psi)(min)(gpm)(em/sec)331.934814957.36.63x10.5346.936315562.452.14x10.5361.937816252.752.31x10.5376.93931503512.71.15x10.4391.94081104010.91.32x10.4406.94235051.74.24x10-5421.94381886.42.91x10-6436.94531955.241.68x10.6451.94682008.362.46x10-6466.94832006.543.70x10.6481.94982007.543.70x10.6496.95132007.604.11x10-6511.95282005.553.76x10-6526.95432005.966.57x10-6541.95582006.855.82x10-6556.95732006.765.20x10-6571.958820072.051.40x10.5586.96032006.855.82x10-6601.961820072.81.92x10-5616.96332006.755.13x10.6631.96482006.825.61x10-6646.966322581.609.77x10-6661.96782006.805.47x10-6669.967120071.17.53x10.6691.970820061.087.39x10.6706.972320061.28.21x10-6721.9738200121.06.84x10.6BoreholeBH-8 APPENDIXB-2DEVILCANYONREPORTSAPPENDIXB-2DEVILCANYONREPORTS LENGTHce5RE.OFREC.RUN(RQO.)Run18511.8(20)to15.8Run210015.8(88)to20.8Run38520.8(59)to26.2Run48626.2(82)to31.3HOLENO,BH-lSHEETNO._1_OF..1..Q..(ACRES)052504(R&M)Gray-brownwithintercalated.quartzstringersforming30%ofrock.Foliationregulartoswirlingat60°to90°tocoreaxis.Moderatelyhardtohard;slightlytomoderatelyweathered.fracturedandfriablethroughout.Becomeslessweatheredwithdepth.Limonitestainingandminorclayorsandalongdiscontinuities.12.8-14.8Highlyfractured.Coreloss0.6'.Sandygravelwithsomesiltandscatteredcobbles.Notsampled.DESCRIPTION:17.5-18.3Highlyfractured.Mediumgraytodarkgray,veryfinetomediumgrained.Laminaeorientedapproximately30°tocoreaxis.Contortedquartzstringersandirregularbeddingthroughout.Generallyhardtosoftandfriablelocally.Freshtoslightlyweatheredalongjointsandfractureswithlimonitestainingcommonandoccasionalclayfilling.Minorsulfidemineralizationandcarbonatethroughout.Jointspacingclosetoveryclose.THEDRILLINGCOMPANYGREPORTAHYDROELECTRICI=IRO..JECTASKAI=IOWERAUTHORITYCANYONNQRTHABUTMENTJOBNO.PS70l.0SSOILCasingAdvancerCASINGDIAM.NW~:O.5"O.D.)ROCK_D_IAM__O_N_D_CCR_E_D_R_I_LLCOREDtAM.NQ-3(1.875")LATITUDEN62049'11.427ELEVATIONS:DATUMDEPARTUREw149018'24.797DRILLPLATFORM_BEARING2250GROUNDSURFACE_---=:.::..::=;~~_INITIALDIP670ROCKSURFACEOTHERDIPSBOTTOMOFHOLE-...:....=.~'--J.,~--WATERTABLESTARTED12:00P.M._.::.:A;.:;.U..;;oG..:,.•...;2""3=--198~0:..._______________.FINISHED,M.AUG.31198~0:......-_CRESAMERICANINCORPORATEDI------JR&MCONSULTANTS,INC.ONSULTINGE~GINEERS.-_•••••••••.•••••ANN._.UFFALOINEWYORKANCHORAGE,ALASKA_....::R.:..:.._RAHA==IM::.=.---.:::.J_HA=G:;;;,;AN~_(RaM)APPROVED(RaM)SUMMARY-B.HOLMDATEAPPROVED---------(ACRES)-(ACRES)DATELENGTHce5RE.OFREC.RUN(RQO.)Run18511.8(20)to15.8Run210015.8(88)to20.8Run38520.8(59)to26.2Run48626.2(82)to31.3HOLENO,BH-lSHEETNO._1_OF..1..Q..(ACRES)052504(R&M)Gray-brownwithintercalated.quartzstringersforming30%ofrock.Foliationregulartoswirlingat60°to90°tocoreaxis.Moderatelyhardtohard;slightlytomoderatelyweathered.fracturedandfriablethroughout.Becomeslessweatheredwithdepth.Limonitestainingandminorclayorsandalongdiscontinuities.12.8-14.8Highlyfractured.Coreloss0.6'.Sandygravelwithsomesiltandscatteredcobbles.Notsampled.DESCRIPTION:17.5-18.3Highlyfractured.Mediumgraytodarkgray,veryfinetomediumgrained.Laminaeorientedapproximately30°tocoreaxis.Contortedquartzstringersandirregularbeddingthroughout.Generallyhardtosoftandfriablelocally.Freshtoslightlyweatheredalongjointsandfractureswithlimonitestainingcommonandoccasionalclayfilling.Minorsulfidemineralizationandcarbonatethroughout.Jointspacingclosetoveryclose.THEDRILLINGCOMPANYGREPORTAHYDROELECTRICI=IRO..JECTASKAI=IOWERAUTHORITYCANYONNQRTHABUTMENTJOBNO.PS70l.0SSOILCasingAdvancerCASINGDIAM.NW~:O.5"O.D.)ROCK_D_IAM__O_N_D_CCR_E_D_R_I_LLCOREDtAM.NQ-3(1.875")LATITUDEN62049'11.427ELEVATIONS:DATUMDEPARTUREw149018'24.797DRILLPLATFORM_BEARING2250GROUNDSURFACE_---=:.::..::=;~~_INITIALDIP670ROCKSURFACEOTHERDIPSBOTTOMOFHOLE-...:....=.~'--J.,~--WATERTABLESTARTED12:00P.M._.::.:A;.:;.U..;;oG..:,.•...;2""3=--198~0:..._______________.FINISHED,M.AUG.31198~0:......-_CRESAMERICANINCORPORATEDI------JR&MCONSULTANTS,INC.ONSULTINGE~GINEERS.-_•••••••••.•••••ANN._.UFFALOINEWYORKANCHORAGE,ALASKA_....::R.:..:.._RAHA==IM::.=.---.:::.J_HA=G:;;;,;AN~_(RaM)APPROVED(RaM)SUMMARY-B.HOLMDATEAPPROVED---------(ACRES)-(ACRES)DATE (25.0,26.4-26.6)Softzones.(21.8-22.3)Quartz-carbonate-pyritemineral-izationwithbleachingfromweathering.HOLENO.SHEETNO.(ACRES)~c::!~T~~.!!...!~ANCHORAGE,ALASKA20.8-31.3Coreloss1.51.31.3-35.0Slightlyfissile.Coreloss0.3'.49.0-84.0Quartz,irregularveinsandcementalongoldpartings,4%to12%ofrock.68.1-69.2Quartzveinwithsulfidesandsomevoidsfromsulfideleaching.Darkgraypeliticrockwithoccasionalbluishgraylaminae.Sheenalongirregularfracturesurfaces.Veryfinetofinegrained.Laminaeorientedatapproximately0°to30°tocoreaxis.Moderatelyhardtoveryhard.Wellinduratedwithslightfissilitylocally.Freshtoslightlyweatheredwithlimonitestainingonjointscommon.Elongatedquartzgrainsscatteredthroughout.Euhedralpyritecommonlyassociatedwithbluishzones.Someopenvoidsfromleachedsulfides.Jointspacingveryclosetomoderatelyclose,withoccassionalchloriteorclayfilling.Numerousoldfracturesrehealedbyquartzthroughout./63.5-68.9Highlyfractured.Coreloss1.11.OESCRIPTJON:Meta-ArgilliteROCKTYPEArgillite(cont'd)DRILLINGREPORTSUSITNAHVDROELECTRICPRO.JECTforALASKAPOWERAUTHORITVSITEDEVILCANYONN.ABUTMENTJOBNO.PS70100568.949.0[Ai]ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUn[dBUFFALO,NEWYORK31.3DEPTH(ft)(25.0,26.4-26.6)Softzones.(21.8-22.3)Quartz-carbonate-pyritemineral-izationwithbleachingfromweathering.HOLENO.SHEETNO.(ACRES)~c::!~T~~.!!...!~ANCHORAGE,ALASKA20.8-31.3Coreloss1.51.31.3-35.0Slightlyfissile.Coreloss0.3'.49.0-84.0Quartz,irregularveinsandcementalongoldpartings,4%to12%ofrock.68.1-69.2Quartzveinwithsulfidesandsomevoidsfromsulfideleaching.Darkgraypeliticrockwithoccasionalbluishgraylaminae.Sheenalongirregularfracturesurfaces.Veryfinetofinegrained.Laminaeorientedatapproximately0°to30°tocoreaxis.Moderatelyhardtoveryhard.Wellinduratedwithslightfissilitylocally.Freshtoslightlyweatheredwithlimonitestainingonjointscommon.Elongatedquartzgrainsscatteredthroughout.Euhedralpyritecommonlyassociatedwithbluishzones.Someopenvoidsfromleachedsulfides.Jointspacingveryclosetomoderatelyclose,withoccassionalchloriteorclayfilling.Numerousoldfracturesrehealedbyquartzthroughout./63.5-68.9Highlyfractured.Coreloss1.11.OESCRIPTJON:Meta-ArgilliteROCKTYPEArgillite(cont'd)DRILLINGREPORTSUSITNAHVDROELECTRICPRO.JECTforALASKAPOWERAUTHORITVSITEDEVILCANYONN.ABUTMENTJOBNO.PS70100568.949.0[Ai]ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUn[dBUFFALO,NEWYORK31.3DEPTH(ft) &4.0-101.5QuartzstringersandveinsformingR188740%to60%ofrock.Numeroussmallcavities.84.0(70)to90.0u~>,n';'AMERICANINCORPORATEDl------',o'\-...:::....JCONSULTINGENGINEERS!!.~c:2.'"~.I!;T~~..!'!.l.!~BUFFALO,NEWYORKANCHORAGE,ALASKAHOLENO.BH-1SHEETNO.-L0F.2Q...(ACRES)052504(RaM)94(83)L~FC~E.REC.RUN(RQD)R1510072.3(92)to77.2R1677.2to80.7R199190.0(50)to94.4R208894.4(29)to97.8R215497.8(0)to101.5R2271101.5(23)to105.0R179480.7(48)to84.0R1410068.9(88)to72.379.0-109.1Highlyfracturedandshearedzone.Poorcorerecoverywithcorelossof4.6feet.Slightlytohighlyweatheredthroughout,residualsoillocally.DESCRIPTION:GREPeRTNAHVDROELECTRICPRO-JECTLASKAPOWERAUTHORITVILCANYONN.ABUTMENTJOBNO.P5701.05&4.0-101.5QuartzstringersandveinsformingR188740%to60%ofrock.Numeroussmallcavities.84.0(70)to90.0u~>,n';'AMERICANINCORPORATEDl------',o'\-...:::....JCONSULTINGENGINEERS!!.~c:2.'"~.I!;T~~..!'!.l.!~BUFFALO,NEWYORKANCHORAGE,ALASKAHOLENO.BH-1SHEETNO.-L0F.2Q...(ACRES)052504(RaM)94(83)L~FC~E.REC.RUN(RQD)R1510072.3(92)to77.2R1677.2to80.7R199190.0(50)to94.4R208894.4(29)to97.8R215497.8(0)to101.5R2271101.5(23)to105.0R179480.7(48)to84.0R1410068.9(88)to72.379.0-109.1Highlyfracturedandshearedzone.Poorcorerecoverywithcorelossof4.6feet.Slightlytohighlyweatheredthroughout,residualsoillocally.DESCRIPTION:GREPeRTNAHVDROELECTRICPRO-JECTLASKAPOWERAUTHORITVILCANYONN.ABUTMENTJOBNO.P5701.05 DRILLINGREPORTSUSITNAHYDROELECTRICPRC..JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P570l.05iiJ.ACRESAMERICANINCORPORATEDAPO[PCONSULTINGENGINEERSUOlOBUFFALO,NEWYORKHOLENO.SHEETNO.(ACRES)052504..-aMocr..•:TANTaINc...........-~_I.T.."'.N__-"'''''.van.·ANCHORAGE,ALASKAJointsandfracturesopentoCoreloss0.5'.129.0-148.0Jointspacingveryclosetoclose.120.9-129.0Clayfillinginjoints.(Possiblegouge).114.0-114.8Quartzvein.112.5-117.6Coreloss0.7'.117.6-118.6Verticalquartzinclusion.109.1-265.6Sulfides3%to8%ofrock.109.1 175.0Mostjointsat60°tocoreaxis.Limonitecommonalongjoints.Numerousdrillingbreaks.Mediumtodarkgray,veryfinetofinegrainedlaminaeorientedapproximately0°to20°tocoreaxis.Contortedquartzstringersandirregularbeddingthroughout.Generallyhard;softandfriablelocally.Freshtoslightlyweathered,withlimonitestainingonjointandfracturesurfaces.Minorsulfidemineralizationthroughout.Jointspacingveryclosetomoderatelyclose.125.0-129.00.05'withinrun.oESCRIPTION:ROCKTYPEArgillite144.3105.0DEPTH(ft)DRILLINGREPORTSUSITNAHYDROELECTRICPRC..JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P570l.05iiJ.ACRESAMERICANINCORPORATEDAPO[PCONSULTINGENGINEERSUOlOBUFFALO,NEWYORKHOLENO.SHEETNO.(ACRES)052504..-aMocr..•:TANTaINc...........-~_I.T.."'.N__-"'''''.van.·ANCHORAGE,ALASKAJointsandfracturesopentoCoreloss0.5'.129.0-148.0Jointspacingveryclosetoclose.120.9-129.0Clayfillinginjoints.(Possiblegouge).114.0-114.8Quartzvein.112.5-117.6Coreloss0.7'.117.6-118.6Verticalquartzinclusion.109.1-265.6Sulfides3%to8%ofrock.109.1 175.0Mostjointsat60°tocoreaxis.Limonitecommonalongjoints.Numerousdrillingbreaks.Mediumtodarkgray,veryfinetofinegrainedlaminaeorientedapproximately0°to20°tocoreaxis.Contortedquartzstringersandirregularbeddingthroughout.Generallyhard;softandfriablelocally.Freshtoslightlyweathered,withlimonitestainingonjointandfracturesurfaces.Minorsulfidemineralizationthroughout.Jointspacingveryclosetomoderatelyclose.125.0-129.00.05'withinrun.oESCRIPTION:ROCKTYPEArgillite144.3105.0DEPTH(ft) RESAMERICANINCORPORATEDt-------',-='""-4\.~iiiUUiwra:INic:----~NSULTINGENGINEERS~c:E!~"!'~!.,,!~FFALOINEWYORKANCHORAGE•ALASKAR33100spacingverycloseto148.0(92)to153.2175.0-276.1Numerousfracturescementedwithcalcite,minorchlorite.Corefrequentlybrokenalongthesesurfacesbydrilling.R34100153.2(83)to156.2R3596156.2(89)to161.5R36100161.5(loa)to166.3R37100166.3(100)to171.5R38100171.5(l00)to176.3R39100176.3(100)to181.4R40100181.4(100)to186.3LOFCORE.REC.RUN(RQD)R3289144.3(81)to148.0HOLENO.BH-lSHEETNO.--LOF..lQ..(ACRES)052504(RaM)148.0 166.3Jointmoderatelyclose.(144.3-148.3)Coreloss0.4'.(156.2-161.5)Coreloss0.2'.DESCRIPTION:GREPORTAHYDROELECTRICPRO.JECTSKAPOWERAUTHORITYCANYONN.ABUTMENTJOBNO.P5701.05RESAMERICANINCORPORATEDt-------',-='""-4\.~iiiUUiwra:INic:----~NSULTINGENGINEERS~c:E!~"!'~!.,,!~FFALOINEWYORKANCHORAGE•ALASKAR33100spacingverycloseto148.0(92)to153.2175.0-276.1Numerousfracturescementedwithcalcite,minorchlorite.Corefrequentlybrokenalongthesesurfacesbydrilling.R34100153.2(83)to156.2R3596156.2(89)to161.5R36100161.5(loa)to166.3R37100166.3(100)to171.5R38100171.5(l00)to176.3R39100176.3(100)to181.4R40100181.4(100)to186.3LOFCORE.REC.RUN(RQD)R3289144.3(81)to148.0HOLENO.BH-lSHEETNO.--LOF..lQ..(ACRES)052504(RaM)148.0 166.3Jointmoderatelyclose.(144.3-148.3)Coreloss0.4'.(156.2-161.5)Coreloss0.2'.DESCRIPTION:GREPORTAHYDROELECTRICPRO.JECTSKAPOWERAUTHORITYCANYONN.ABUTMENTJOBNO.P5701.05 220.0-221.2Jointsorientedparalleltocoreaxis,withclaygouge.230.0LoRHOLENO.SHEETNO.6(ACRES)052504~c:E[~;r~N,!!,...!~ANCHORAGE,ALASKADESCRIPTION:ROCKTYPEDRILLINGREPORTSUBITNAHYDROELECTRICPRC.JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P570L05iiJACRESAMERICANINCORPORATEDIPD[PCONSULTINGENGINEERSIIUO[dBUFFALO,NEWYORK186.3Argillite(cont'd)DEPTH(ft)220.0-221.2Jointsorientedparalleltocoreaxis,withclaygouge.230.0LoRHOLENO.SHEETNO.6(ACRES)052504~c:E[~;r~N,!!,...!~ANCHORAGE,ALASKADESCRIPTION:ROCKTYPEDRILLINGREPORTSUBITNAHYDROELECTRICPRC.JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P570L05iiJACRESAMERICANINCORPORATEDIPD[PCONSULTINGENGINEERSIIUO[dBUFFALO,NEWYORK186.3Argillite(cont'd)DEPTH(ft) 240.1-241.0.MinorclayalongpartingswithinR52100run.240.1(94)to241.8ANCHORAGE,ALASKAL~FC~E.REC.RUN(RQO)R53100241.8(100)to246.9R54100246.9(100)to251.5R55100251.5(91)to255.9R56100255.9(100)to260.5R57100260.5(100)to262.5R~58100262.5(87)to265.6R51100235.0(98)to240.1R50100230.0(100)to235.0HOLENO.BH-lSHEETNO._7_OF..-£.Q..(ACRES)052504(RaM)241.8Coreisfreshbelowthispoint.260.5-276.1Jointspacingveryclosetoclose.DESCRIPTION:GREPORTAHYDROELECTRICPRO.JECT.ASKAPOWERAUTHORITYCANYONN.ABUTMENTJOBNO.P5701.05CRESAMERICANINCORPORATED1--------'ONSULTINGENGINEERSUFFALOINEWYORK240.1-241.0.MinorclayalongpartingswithinR52100run.240.1(94)to241.8ANCHORAGE,ALASKAL~FC~E.REC.RUN(RQO)R53100241.8(100)to246.9R54100246.9(100)to251.5R55100251.5(91)to255.9R56100255.9(100)to260.5R57100260.5(100)to262.5R~58100262.5(87)to265.6R51100235.0(98)to240.1R50100230.0(100)to235.0HOLENO.BH-lSHEETNO._7_OF..-£.Q..(ACRES)052504(RaM)241.8Coreisfreshbelowthispoint.260.5-276.1Jointspacingveryclosetoclose.DESCRIPTION:GREPORTAHYDROELECTRICPRO.JECT.ASKAPOWERAUTHORITYCANYONN.ABUTMENTJOBNO.P5701.05CRESAMERICANINCORPORATED1--------'ONSULTINGENGINEERSUFFALOINEWYORK DRILLINGREPORTSUSITNAHYDROELECTRICPRO..JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05•ACRESAMERICANINCORPORATEDAPO[OCONSULTINGENGINEERSUn[dBUFFALO,NEWYORKHOLENO.SHEETNO.(ACRES)--=.;:;.":,,,,;~~e!'!!!".:r.e..~.!!...~~ANCHORAGE,ALASKA285.2-286.6Coreloss0.2I •285.30.1'layerofclaygouge.276.1-280.3Slickensidedpartings.Darkgraytoblack;'finetomediumgrainedwithcrystallineliketexture.3%to7%greencarbonatecrystals,quartzrich.Freshtomoderatelyweatheredhardtoveryhard.Jointspacingveryclosetomoderatelyclose.Mediumtodarkgray,mottledbluish-graylocally.Finegrained;moderatelyhardtoveryhard,freshandcompetent.Minorsulfidemineralization.Carbonatescommon.Jointspacingveryclosetomoderatelyclose.Numeroushealedjointsthroughout.(270.3-274.2)Coreloss0.8'.OESCRIPTION:LithicGraywackeMetaArgilliteROCKTYPEArgillite(cont'd)276.2296.5298.9265.6DEPTH(ftODRILLINGREPORTSUSITNAHYDROELECTRICPRO..JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05•ACRESAMERICANINCORPORATEDAPO[OCONSULTINGENGINEERSUn[dBUFFALO,NEWYORKHOLENO.SHEETNO.(ACRES)--=.;:;.":,,,,;~~e!'!!!".:r.e..~.!!...~~ANCHORAGE,ALASKA285.2-286.6Coreloss0.2I •285.30.1'layerofclaygouge.276.1-280.3Slickensidedpartings.Darkgraytoblack;'finetomediumgrainedwithcrystallineliketexture.3%to7%greencarbonatecrystals,quartzrich.Freshtomoderatelyweatheredhardtoveryhard.Jointspacingveryclosetomoderatelyclose.Mediumtodarkgray,mottledbluish-graylocally.Finegrained;moderatelyhardtoveryhard,freshandcompetent.Minorsulfidemineralization.Carbonatescommon.Jointspacingveryclosetomoderatelyclose.Numeroushealedjointsthroughout.(270.3-274.2)Coreloss0.8'.OESCRIPTION:LithicGraywackeMetaArgilliteROCKTYPEArgillite(cont'd)276.2296.5298.9265.6DEPTH(ftO 100(85)L~FCoffE.REC.RUN(RQD)R68298.0to303.0R69100303.0(90)to305.0R7082305.0(68)to306.1R7198306.1(71)to311.0R72100311.0(85)to315.7R73100315.7(100)to320.0R7494320.0(92)to325.0R75100325.0(85)to329.7R76100329.7(80)to334.7HOLENO.BH-ISHEETNO._9_0F...2.Q..(ACRES)052504(RaM)305.0-311.0Coreloss0.3'.296.0 298.9Shearzone,highlyfractured,weatheredandslickensided.Coreloss0.6'320.0-325.0Coreloss0.3'.306.1-311.0Jointspacingveryclose.Mediumtodarkgrayclayeymatrixcontainingcoarse,angularandsub-roundedclastsofquartz,phyllite,argillite,andotherrocktypesranginginsizefrom0.01'to0.1'andconstituting50%to60%ofrockmass.Wellindurated,hardtoveryhard,competent,fresh.Containsthinlayers(1to2feetthick)ofArgillitelocally.Jointspacingveryclosetomoderatelyclose.Chloriteandcarbonatecoatingonjointscommon.Occasionalhealedjoints.DESCRIPTION:REPeRTHYDROELECTRICPRO....ECTSKAPOWERAUTHORITYCANYONN.ABUTMENTJOBNO.P5701.05ESAMERICANINCORPORATEDt-------'.......NSULTlNGENGINEERS~c:2."~·.o;T~.!!.,,~~FALOINEWYORKANCHORAGE,AL.ASKA100(85)L~FCoffE.REC.RUN(RQD)R68298.0to303.0R69100303.0(90)to305.0R7082305.0(68)to306.1R7198306.1(71)to311.0R72100311.0(85)to315.7R73100315.7(100)to320.0R7494320.0(92)to325.0R75100325.0(85)to329.7R76100329.7(80)to334.7HOLENO.BH-ISHEETNO._9_0F...2.Q..(ACRES)052504(RaM)305.0-311.0Coreloss0.3'.296.0 298.9Shearzone,highlyfractured,weatheredandslickensided.Coreloss0.6'320.0-325.0Coreloss0.3'.306.1-311.0Jointspacingveryclose.Mediumtodarkgrayclayeymatrixcontainingcoarse,angularandsub-roundedclastsofquartz,phyllite,argillite,andotherrocktypesranginginsizefrom0.01'to0.1'andconstituting50%to60%ofrockmass.Wellindurated,hardtoveryhard,competent,fresh.Containsthinlayers(1to2feetthick)ofArgillitelocally.Jointspacingveryclosetomoderatelyclose.Chloriteandcarbonatecoatingonjointscommon.Occasionalhealedjoints.DESCRIPTION:REPeRTHYDROELECTRICPRO....ECTSKAPOWERAUTHORITYCANYONN.ABUTMENTJOBNO.P5701.05ESAMERICANINCORPORATEDt-------'.......NSULTlNGENGINEERS~c:2."~·.o;T~.!!.,,~~FALOINEWYORKANCHORAGE,AL.ASKA DRILLINGREPCRTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05HOLENO.SHEETNO.(ACRES)05250343.0Jointwithclaygouge.OESCRIPTION:ACRESAMERICANINCORPORATEDI-----~-...:::...;...JCONSULTlNGENGlNEERS~1~~~c~F~iii..;UT!i&::~;;~"N~:rTi~iii:...\,~....;;;BUFFALO,NEWYORKANCHORAGEtALASKAROCKTYPE369.3334.7Graywacke(cont'd)DEPTH(ft)DRILLINGREPCRTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05HOLENO.SHEETNO.(ACRES)05250343.0Jointwithclaygouge.OESCRIPTION:ACRESAMERICANINCORPORATEDI-----~-...:::...;...JCONSULTlNGENGlNEERS~1~~~c~F~iii..;UT!i&::~;;~"N~:rTi~iii:...\,~....;;;BUFFALO,NEWYORKANCHORAGEtALASKAROCKTYPE369.3334.7Graywacke(cont'd)DEPTH(ft) R89100Numeroushealedjointsbrokenby381.5(100)to386.5L~Fco'rfE.REC.RUN(RQD)R86100369.3(93)to373.6R87100373.6(100)to378.6R88100378.6(86)to381.5R9095386.5(94)to391.4R91100391.4(98)to396.5R92100396.5(90)to401.5R93100401.5(96)to406.6R94100406.6(82)to411.5HOLENO._B_H_-l_SHEETNO...lLOF20(ACRES)052504(RaM)386.5-391.4Coreloss0.2'.373.3to373.6Shearzonewithclaygouge.378.7Clayfilledjoint.381.5-401.5drilling.406.0-424.0Jointspacingveryclosetoclose.DESCRIPTION:ESAMERICANINCORPORATEDt--------'~~SULTINGENGINEERSFALOINEWYORKREPeRTHYDROELECTRICPRO....ECTSKAPOWERAUTHORITYCANYONN.ABUTMENTJOBNO.P5701.05R89100Numeroushealedjointsbrokenby381.5(100)to386.5L~Fco'rfE.REC.RUN(RQD)R86100369.3(93)to373.6R87100373.6(100)to378.6R88100378.6(86)to381.5R9095386.5(94)to391.4R91100391.4(98)to396.5R92100396.5(90)to401.5R93100401.5(96)to406.6R94100406.6(82)to411.5HOLENO._B_H_-l_SHEETNO...lLOF20(ACRES)052504(RaM)386.5-391.4Coreloss0.2'.373.3to373.6Shearzonewithclaygouge.378.7Clayfilledjoint.381.5-401.5drilling.406.0-424.0Jointspacingveryclosetoclose.DESCRIPTION:ESAMERICANINCORPORATEDt--------'~~SULTINGENGINEERSFALOINEWYORKREPeRTHYDROELECTRICPRO....ECTSKAPOWERAUTHORITYCANYONN.ABUTMENTJOBNO.P5701.05 DRILLINGREPeRTSUSITNAHYDROELECTRICPRO.lECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05mACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUOldBUFFALOINEWYORKHOLENO.SHEETNO.(ACRES)0525....Mca,,--:rANT.INc.•.......-~_'.T••"'......_.",\.v."'QaqANCHORAGE,ALASKA413.3-415.3Highlyfracturedzone.423.9-424.1Highlyfracturedzone,traceofclaygouge.DESCRIPTION:ROCKTYPE454.7411.5Graywacke(cant1d)DEPTH(ft)DRILLINGREPeRTSUSITNAHYDROELECTRICPRO.lECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05mACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUOldBUFFALOINEWYORKHOLENO.SHEETNO.(ACRES)0525....Mca,,--:rANT.INc.•.......-~_'.T••"'......_.",\.v."'QaqANCHORAGE,ALASKA413.3-415.3Highlyfracturedzone.423.9-424.1Highlyfracturedzone,traceofclaygouge.DESCRIPTION:ROCKTYPE454.7411.5Graywacke(cant1d)DEPTH(ft) L~FC~E.REC.RUN(RQD)HOLENO.BH-lSHEETNO.--ll.OF...1.Q..(ACRES)052504(RaM)R104100454.7(100to459.8R105100459.8(100)to463.8R106100463.8(100)to468.6R107100468.6(100)to473.1R108100473.1(100)to475.4R109100475.4(82)to480.5R110100480.5(100)to485.5R111 100485.5(85)to488.8R11296488.8-491.5Coreloss0.1'.488.8(70)to491.5DESCRIPTION:GREPORTAHYDROELECTRICPRO..JECTASKAPOWERAUTHORITYCANYONN.ABUTMENTJOBNO.P5701.05CRESAMERICANINCORPORATEDI------..J"-=...~ONSULTJNGENGINEERS~·~~~C~F.f!'A•.•M:Tei.;,!~i_:;;;~n:r~!l.u""!~;vac:••~---1UFFALOINEWYORKANCHORAGEtALASKAL~FC~E.REC.RUN(RQD)HOLENO.BH-lSHEETNO.--ll.OF...1.Q..(ACRES)052504(RaM)R104100454.7(100to459.8R105100459.8(100)to463.8R106100463.8(100)to468.6R107100468.6(100)to473.1R108100473.1(100)to475.4R109100475.4(82)to480.5R110100480.5(100)to485.5R111 100485.5(85)to488.8R11296488.8-491.5Coreloss0.1'.488.8(70)to491.5DESCRIPTION:GREPORTAHYDROELECTRICPRO..JECTASKAPOWERAUTHORITYCANYONN.ABUTMENTJOBNO.P5701.05CRESAMERICANINCORPORATEDI------..J"-=...~ONSULTJNGENGINEERS~·~~~C~F.f!'A•.•M:Tei.;,!~i_:;;;~n:r~!l.u""!~;vac:••~---1UFFALOINEWYORKANCHORAGEtALASKA (533.5)Jointwithcarbonateandclaygouge.534.0HOLENO.SHEETNO.(ACRES)052504...aMcar..•:rANT.INc:........-,....._..T................•U\."."'''8ANCHORAGE,ALASKA530.4-534.0Coreloss0.2'.DESCRIPTION:ROCKTYPEDRILLINGREPORTSUSITNAHYDROELECTRICPRO..JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05mACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUnldBUFFALOINEWYORK491.5Graywacke(cont'd)DEPTH(ft)(533.5)Jointwithcarbonateandclaygouge.534.0HOLENO.SHEETNO.(ACRES)052504...aMcar..•:rANT.INc:........-,....._..T................•U\."."'''8ANCHORAGE,ALASKA530.4-534.0Coreloss0.2'.DESCRIPTION:ROCKTYPEDRILLINGREPORTSUSITNAHYDROELECTRICPRO..JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05mACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUnldBUFFALOINEWYORK491.5Graywacke(cont'd)DEPTH(ft) L~FCoffE.REC.RUN(RQO)R122100534.0(98)to539.0R123100539.0(89)to544.3R124100544.3(100)to549.5R125100549.5(l00)to554.5R126100554.5(90)to559.7R127 100559.7(100)to564.8R128100564.8(l00)to569.7R129100569.7(100)to575.1R130100575.1(92)to579.9HOLENO....::B::=,:H:....;-l=--__SHEETNO..12-0 F.2Q.(ACRES)052504(RaM)540-750.2Generallyhard,fresh,competent.DESCRIPTION:REPORT'AHYDRDELECTRICPRO..JECTSK'APOWERAUTHDRITYCANYONN.ABUTMENTJOBNO.P5701.05RESAMERICANINCORPORATED~-J'''"\NSULTINGENGINEERS~~.!l!!!:'l!...:r~!\'~~FFALOINEWYORKANCHORAGE,AL.ASKAL~FCoffE.REC.RUN(RQO)R122100534.0(98)to539.0R123100539.0(89)to544.3R124100544.3(100)to549.5R125100549.5(l00)to554.5R126100554.5(90)to559.7R127 100559.7(100)to564.8R128100564.8(l00)to569.7R129100569.7(100)to575.1R130100575.1(92)to579.9HOLENO....::B::=,:H:....;-l=--__SHEETNO..12-0 F.2Q.(ACRES)052504(RaM)540-750.2Generallyhard,fresh,competent.DESCRIPTION:REPORT'AHYDRDELECTRICPRO..JECTSK'APOWERAUTHDRITYCANYONN.ABUTMENTJOBNO.P5701.05RESAMERICANINCORPORATED~-J'''"\NSULTINGENGINEERS~~.!l!!!:'l!...:r~!\'~~FFALOINEWYORKANCHORAGE,AL.ASKA DRILLINGREPORTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN•ABUTMENTJOBNO.P5701.05HOLENO.SHEETNO.(ACRES)052504...aMCC'.....I@",T...NT.INC.•......-....._I.T.--......-.",1."'."0".ANCHORAGE,ALASKA598.7-599.1Coreshattered.DESCRIPTION:ROCKTYPE[iiJ.ACRESAMERICANINCORPORATEDIPO£OCONSULTINGENGINEERSIIUOldBUFFALOINEWYORK619.8DEPTH(ft)579.9Graywacke(cont'd)DRILLINGREPORTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN•ABUTMENTJOBNO.P5701.05HOLENO.SHEETNO.(ACRES)052504...aMCC'.....I@",T...NT.INC.•......-....._I.T.--......-.",1."'."0".ANCHORAGE,ALASKA598.7-599.1Coreshattered.DESCRIPTION:ROCKTYPE[iiJ.ACRESAMERICANINCORPORATEDIPO£OCONSULTINGENGINEERSIIUOldBUFFALOINEWYORK619.8DEPTH(ft)579.9Graywacke(cont'd) HOLENO.BH-lSHEETNO...!7-OF.2£.(ACRES)052504(RaM)LEC~E.OFREC.RUN(RQO)R140100619.8(95)to621.7R141100621.7(98)to626.8R142100626.8(100)to631.7R143100631.7(laO)to636.7R144100636.7(100)to641.6R145100641.6(100)to645.2R146100645.2(100)to650.0R147100650.0(100)to655.2R148100655.2(96)to660.4(621.6-621.7)Coreshattered.OESCRIPTION:ACRESAMERICANINCORPORATEDt-------'CONSULTINGENGINEERS~~~~!.\.!~BUFFALOINEWYORKANCHORAGE,ALASKAGREPeRTAHYDROELECTRICPRO..JECTLASKAPOWERAUTHORITYILCANYONN.ABUTMENTJOBNO.P5701.05HOLENO.BH-lSHEETNO...!7-OF.2£.(ACRES)052504(RaM)LEC~E.OFREC.RUN(RQO)R140100619.8(95)to621.7R141100621.7(98)to626.8R142100626.8(100)to631.7R143100631.7(laO)to636.7R144100636.7(100)to641.6R145100641.6(100)to645.2R146100645.2(100)to650.0R147100650.0(100)to655.2R148100655.2(96)to660.4(621.6-621.7)Coreshattered.OESCRIPTION:ACRESAMERICANINCORPORATEDt-------'CONSULTINGENGINEERS~~~~!.\.!~BUFFALOINEWYORKANCHORAGE,ALASKAGREPeRTAHYDROELECTRICPRO..JECTLASKAPOWERAUTHORITYILCANYONN.ABUTMENTJOBNO.P5701.05 DRILLINGREPORTSUSITNAHVDROELECTRICPRO..JECTforALASKAPOWERAUTHORITVSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05•ACRESAMERICANINCORPORATEDAPO£OCONSULTINGENGINEERSUOldBUFFALOINEWYORK~'?E!_~:r~!.\.!~,ANCHORAGE,ALASKA683.9-690.0Coreloss0.7'.DESCRIPTION:ROCKTYPEDEPTHft660.4Graywacke(cant'd)705.7DRILLINGREPORTSUSITNAHVDROELECTRICPRO..JECTforALASKAPOWERAUTHORITVSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05•ACRESAMERICANINCORPORATEDAPO£OCONSULTINGENGINEERSUOldBUFFALOINEWYORK~'?E!_~:r~!.\.!~,ANCHORAGE,ALASKA683.9-690.0Coreloss0.7'.DESCRIPTION:ROCKTYPEDEPTHft660.4Graywacke(cant'd)705.7 731.8-732.5Highlyfracturedzone.L~FC~E.REC.RUN(RQD)R158100705.7(100)to710.6R159100710.6(l00)to715.7R160100715.7(98)to721.0R161 100721.0(100)to725.4R162100725.4(95)to727.4R163100727.4(91)to731.8R164100731.8(85)to737.1R165100737.1(91)to741.5R166100741.5(98)to745.7HOLENO._B_H_-.l_SHEETNO....1LOF.2Q.'(ACRES)052504(RaM)727.1Jointwithclaycoating.737.4Jointwith\"claygouge.733.0Jointwithclaygouge.OESCRIPTION:GREPORTAHYDROELECTRICPRO-JECTASKAPOWE,RAUTHORITYCANYONN.ABUTMENTJOBNO.P5701.05ACRESAMERICANINCORPORATED1---.r~::..JCONSULTINGENGINEERS~Cc:;...:CCI"\F~·••Il.T•.IL""':T..~~..!!.I.~~UFFALOINEWYORKANCHORAGE,ALASKA731.8-732.5Highlyfracturedzone.L~FC~E.REC.RUN(RQD)R158100705.7(100)to710.6R159100710.6(l00)to715.7R160100715.7(98)to721.0R161 100721.0(100)to725.4R162100725.4(95)to727.4R163100727.4(91)to731.8R164100731.8(85)to737.1R165100737.1(91)to741.5R166100741.5(98)to745.7HOLENO._B_H_-.l_SHEETNO....1LOF.2Q.'(ACRES)052504(RaM)727.1Jointwithclaycoating.737.4Jointwith\"claygouge.733.0Jointwithclaygouge.OESCRIPTION:GREPORTAHYDROELECTRICPRO-JECTASKAPOWE,RAUTHORITYCANYONN.ABUTMENTJOBNO.P5701.05ACRESAMERICANINCORPORATED1---.r~::..JCONSULTINGENGINEERS~Cc:;...:CCI"\F~·••Il.T•.IL""':T..~~..!!.I.~~UFFALOINEWYORKANCHORAGE,ALASKA 750.2EndofHole---------------~-DRILLINGREPDRTSUSITNAHYDROELECTRICPRO.JeCTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.PS701.0S...aMccr..-:rANT.INC.•.......-....._,•.,....\"A.........U1.V.VOllllQANCHORAGE,ALASKADESCRIPTION:ROCKTYPE•.ACRESAMERICANINCORPORATEDAPO[OCONSULTINGENGINEERSUO[dBUFFALO,NEWYORKDEPTH(ft)745.7Graywacke(cont'd)750.2EndofHole---------------~-DRILLINGREPDRTSUSITNAHYDROELECTRICPRO.JeCTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.PS701.0S...aMccr..-:rANT.INC.•.......-....._,•.,....\"A.........U1.V.VOllllQANCHORAGE,ALASKADESCRIPTION:ROCKTYPE•.ACRESAMERICANINCORPORATEDAPO[OCONSULTINGENGINEERSUO[dBUFFALO,NEWYORKDEPTH(ft)745.7Graywacke(cont'd) HOLENO._B=.H:....:........-..:.,.'DATEAUG1980LOCATION_--=D::.:E=-V:...:I=L---:C::.;,.A..:.;.N..:-'f:..:O::.:.N.:.--_PHYLLITEMETA-ARGILLITEGRAYWACKIARGILLITELITHICGRAYWACKIMETA-ARGIWTEARGILLITEHIGHLYFRACTUREDaSHEAREDGOUGESHEARZONEQUARTZVEINaSTRINGERSQUARTZVEINGOUGEMINERALIZEDZONEHIGHLYFRACTUREDINCORPORATED=rl;=;=l;=;=l;"i"I--+-+-+-+--t-TOPOFROCK---------,HIGHLYFRACTUREDCORERECOVERYNUMBEROFJOINTSPER10FT.5101520REMARKSBEDROCKLOGSAMERICAN'"'~'"'z~0:I:!iI->C1........J0...141520406080100120140160180200220240260280300320340ACRESHOLENO._B=.H:....:........-..:.,.'DATEAUG1980LOCATION_--=D::.:E=-V:...:I=L---:C::.;,.A..:.;.N..:-'f:..:O::.:.N.:.--_PHYLLITEMETA-ARGILLITEGRAYWACKIARGILLITELITHICGRAYWACKIMETA-ARGIWTEARGILLITEHIGHLYFRACTUREDaSHEAREDGOUGESHEARZONEQUARTZVEINaSTRINGERSQUARTZVEINGOUGEMINERALIZEDZONEHIGHLYFRACTUREDINCORPORATED=rl;=;=l;=;=l;"i"I--+-+-+-+-+-TOPOFROCK---------,HIGHLYFRACTUREDCORERECOVERYNUMBEROFJOINTSPER10FT.5101520REMARKSBEDROCKLOGSAMERICAN'"'~'"'z~0:I:!iI->C1........J0...141520406080100120140160180200220240260280300320340ACRES SHEARZONEHIGHLYFRACTUREDHIGHLYFRACTUREDREMARKSNUMBEROFJOINTSPER10FT.5101520INCORPORATED680580620700BEDROCKLOGS400,..:;:~z~0J:~I-0-W..J0w360560440660520500480380420600460HOLENO._-=B::.:H~-...:..IDATEAUGUST,80LOCATION_-=D:.:=E:..:,V..:.;IL=--_C::.:A...::N.:...'f<:..:O:.:.N-=--_ACRESAMERICANSHEARZONEHIGHLYFRACTUREDHIGHLYFRACTUREDREMARKSNUMBEROFJOINTSPER10FT.5101520INCORPORATED680580620700BEDROCKLOGS400,..:;:~z~0J:~I-0-W..J0w360560440660520500480380420600460HOLENO._-=B::.:H~-...:..IDATEAUGUST,80LOCATION_-=D:.:=E:..:,V..:.;IL=--_C::.:A...::N.:...'f<:..:O:.:.N-=--_ACRESAMERICAN BEDROCKLOGS---!:B:!.!.H.!....-...,:.IDATEAUG1980DEVILCANYONAMERICANINCORPORATEDREMARKSHIGHLYFRACTURED""1-..,....,..-+--1-"';'-ENDOFHOLE7aO.Z'-uGRAYWACKEBEDROCKLOGS---!:B:!.!.H.!....-...,:.IDATEAUG1980DEVILCANYONAMERICANINCORPORATEDREMARKSHIGHLYFRACTURED""1-..,....,..-+--1-"';'-ENDOFHOLE7aO.Z'-uGRAYWACKE WATERPRESSURETESTRESULTSBH-lDevilCanoneElevation1415192feet(Vertical)67°GaugeDurationCoefficientofStickupPressureofTestFlowRatePermeability(feet)(psi)(min)(gpm)(em/sec)82011.709.31x10-6330114.15.07x10-5840106.26.94x10-534510.788.53x10-685510.505.00x10-636046.90to5.40-68.82x10To-55.29x1087021.65to.95-65.88x10To-68.59x1037514.807.10x10-688510.84to1.25-66.93x10To-51.03x1039010.02to.15-71.62x10To-61.22x10WATERPRESSURETESTRESULTSBH-lDevilCanoneElevation1415192feet(Vertical)67°GaugeDurationCoefficientofStickupPressureofTestFlowRatePermeability(feet)(psi)(min)(gpm)(em/sec)82011.709.31x10-6330114.15.07x10-5840106.26.94x10-534510.788.53x10-685510.505.00x10-636046.90to5.40-68.82x10To-55.29x1087021.65to.95-65.88x10To-68.59x1037514.807.10x10-688510.84to1.25-66.93x10To-51.03x1039010.02to.15-71.62x10To-61.22x10 Borehole-:BH-lDepthTestedFromTo(feet) (feet)5.252.21.62.1.401.5.1to.42to5.8FlowRate(gpm).6to1.2.20to.321.1to2.8.26to2.22.3to3.0.30to.701.65to2.45101010101010101010101010101010DurationofTest(min)150180135145195170160165130200105115120190GaugePressure(psi)100333883338888838DevilCanyon-(Continued)Stickup(feet)295310280325220370355205385340250235265400415338.9248.9308.9323.9233.9383.9263.9188.9353.9293.9278.9203.9398.9368.9218.9Borehole-:BH-lDepthTestedFromTo(feet) (feet)5.252.21.62.1.401.5.1to.42to5.8FlowRate(gpm).6to1.2.20to.321.1to2.8.26to2.22.3to3.0.30to.701.65to2.45101010101010101010101010101010DurationofTest(min)150180135145195170160165130200105115120190GaugePressure(psi)100333883338888838DevilCanyon-(Continued)Stickup(feet)295310280325220370355205385340250235265400415338.9248.9308.9323.9233.9383.9263.9188.9353.9293.9278.9203.9398.9368.9218.9 0'DevilCanyon-(Continued)GaugeDurationCoefficientofStickupPressureofTestFlowRatePermeability(feet)(psi)(min)(gpm)(em/sec)-63200101.3to2.96.47x10To-51.44x108200-610.301.48x103200.62to1.65-6103.08x10To-68.21x10820010.552.72x10-6320010.743.68x10-68200102.61.28x10-53200.50to2.0-6102.49x10To-69.95x108200-710.2to.59.88x10To-62.47x1032002.4to5.0-5101.19x10To-52.49x108200104.52.22x10-53200103.81.89x10-5820013.91.93x10-53200109.74.83x10-58150132.551.53x10-53130181.217.98x10-6813011.553.60x10-63200107.43.68x10-58130101.026.67x10-60'DevilCanyon-(Continued)GaugeDurationCoefficientofStickupPressureofTestFlowRatePermeability(feet)(psi)(min)(gpm)(em/sec)-63200101.3to2.96.47x10To-51.44x108200-610.301.48x103200.62to1.65-6103.08x10To-68.21x10820010.552.72x10-6320010.743.68x10-68200102.61.28x10-53200.50to2.0-6102.49x10To-69.95x108200-710.2to.59.88x10To-62.47x1032002.4to5.0-5101.19x10To-52.49x108200104.52.22x10-53200103.81.89x10-5820013.91.93x10-53200109.74.83x10-58150132.551.53x10-53130181.217.98x10-6813011.553.60x10-63200107.43.68x10-58130101.026.67x10-6 BoreholeBH';'].DepthTestedFromTo(feet)(feet)FlowRate(gpm).80.40.34to.48.4to1.1227131914DurationofTest(min)150150150GaugePressure(psi)1503883Stickup(feet)-,DevilCanyon-(Continued)745700715730683.9713.9698.9728.9BoreholeBH';'].DepthTestedFromTo(feet)(feet)FlowRate(gpm).80.40.34to.48.4to1.1227131914DurationofTest(min)150150150GaugePressure(psi)1503883Stickup(feet)-,DevilCanyon-(Continued)745700715730683.9713.9698.9728.9 76(40)Run1952.0(53)to6.0Run2406.0(0)to7.0Run3737.0(0)to8.10;'LENGTHCORE.OFRECRUNCRQD.JRun4798.1(0)to10.5Run510.5to16.0intoHOLENO.BH-2SHEETNO._1_OF.lL(ACRES)052504(RaM)GradingDRILLPLATFORM---.,._GROUNDSURFACE---.,.1_2~14~f~t----ROCKSURFACE1212ftBOTTOMOFHOLE__-..-;6;..;;4;,,;;;.5...;.,..7"'::-f_t__WATERTABLE1209ft16.0Silverysheen.Laminaeoffset~~(6.0-10.5)Highlyfracturedinterval,friableDESCRIPTION:2.0-16.0Coreloss2.9'.0.0-2.0Nosamplestaken.Darkbrownorganicsiltwithtracelightgrayash,angularcobbles.Gray,siliceous,veryfinegrained.Thinlybedded,withlaminaeoriented55°to60°tocoreaxis.Veryhardtomoderatelyhard.Freshtoslightlyweathered,withIron-oxidestainingonfractureandjointsurfaces.Jointsveryclosetocloselyspaced.Pyritecubescommon.Occasionalquartzintrusions.10.5phyllite.alanhole.THEDRILLINGCOMPANYSTARTED11:00A.M.Sept.IO1980.FINISHEDM.Sept.151980CASINGADVANCERCASINGDIAM.NW(3.511O.D.)DIAMONDCOREDRILLINGCOREDIAM.NQ(1.875" )GREPORTAHVDROELECTRICPRO..JECTSKAPOWERAUTHORITV.CANYONNORTHABUTMENTJOBNO.P5701.asLATITUDEN62°49'8.737"ELEVATIONS:DATUMDEPARTUREw149°18'21.179"BEARING0°60°INITIALDIP_OTHERDIPS_CRESAMERICANINCORPORATEDI-'o~...=-.JNSULTINGENGINEERS~~~C:E.'~!,~~L;T.e~!.~!~.!:FFALO,NEWYORKANCHORAGE,ALASKA.........=""--'=.;::::.:.:.._==_{RaM)APPROVED_:::---:-:""';----:;-=:--__{RaM)DATEDecember1980APPROVED---------{ACRES)~--------(ACRES)DATE76(40)Run1952.0(53)to6.0Run2406.0(0)to7.0Run3737.0(0)to8.10;'LENGTHCORE.OFRECRUNCRQD.JRun4798.1(0)to10.5Run510.5to16.0intoHOLENO.BH-2SHEETNO._1_OF.lL(ACRES)052504(RaM)GradingDRILLPLATFORM---.,._GROUNDSURFACE---.,.1_2~14~f~t----ROCKSURFACE1212ftBOTTOMOFHOLE__-..-;6;..;;4;,,;;;.5...;.,..7"'::-f_t__WATERTABLE1209ft16.0Silverysheen.Laminaeoffset~~(6.0-10.5)Highlyfracturedinterval,friableDESCRIPTION:2.0-16.0Coreloss2.9'.0.0-2.0Nosamplestaken.Darkbrownorganicsiltwithtracelightgrayash,angularcobbles.Gray,siliceous,veryfinegrained.Thinlybedded,withlaminaeoriented55°to60°tocoreaxis.Veryhardtomoderatelyhard.Freshtoslightlyweathered,withIron-oxidestainingonfractureandjointsurfaces.Jointsveryclosetocloselyspaced.Pyritecubescommon.Occasionalquartzintrusions.10.5phyllite.alanhole.THEDRILLINGCOMPANYSTARTED11:00A.M.Sept.IO1980.FINISHEDM.Sept.151980CASINGADVANCERCASINGDIAM.NW(3.511O.D.)DIAMONDCOREDRILLINGCOREDIAM.NQ(1.875" )GREPORTAHVDROELECTRICPRO..JECTSKAPOWERAUTHORITV.CANYONNORTHABUTMENTJOBNO.P5701.asLATITUDEN62°49'8.737"ELEVATIONS:DATUMDEPARTUREw149°18'21.179"BEARING0°60°INITIALDIP_OTHERDIPS_CRESAMERICANINCORPORATEDI-'o~...=-.JNSULTINGENGINEERS~~~C:E.'~!,~~L;T.e~!.~!~.!:FFALO,NEWYORKANCHORAGE,ALASKA.........=""--'=.;::::.:.:.._==_{RaM)APPROVED_:::---:-:""';----:;-=:--__{RaM)DATEDecember1980APPROVED---------{ACRES)~--------(ACRES)DATE DRILLINGREPORTSUSITNAHVDROELECTRICPRO..JECTforALASKAPOWERAUTHORITVSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05[iiJ.ACRESAMERICANINCORPORATEDAPO[PCONSULTINGENGINEERS'UO[dBUFFALOINEWYORKHOLENO.BSHEETI~V'--==--()R(ACRES)052504~c:2'~-;r~~!.,,!~ANCHORAGE,ALASKAD.,21.0-26.0Slightlyfissile.28.033.0Thinquartzveins.brecciatedzoneatapproximately31feet.Darkgray,thinlybedded.Wavylaminaeorientedat40°to60°tocoreaxis.Veryhardtohard.Freshtomoderatelyweathered,withIron-stainingonjointsandfracturesurfaces.Jointspacingveryclosetomoderatelyclose.Tracetofrequentpyrite.Minorquartzinhealedfractures.33.038.0Argillaceouszone.Fracturesorientedatapproximately0°tocoreaxis.42.0-46.9Jointspacingclosetomoderatelyclose.51.8-57.1Graywackeintermixedwithphyllite.DESCRIPTION:ROCKTYPEPhyllite16.057.1DEPTH(ft)DRILLINGREPORTSUSITNAHVDROELECTRICPRO..JECTforALASKAPOWERAUTHORITVSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05[iiJ.ACRESAMERICANINCORPORATEDAPO[PCONSULTINGENGINEERS'UO[dBUFFALOINEWYORKHOLENO.BSHEETI~V'--==--()R(ACRES)052504~c:2'~-;r~~!.,,!~ANCHORAGE,ALASKAD.,21.0-26.0Slightlyfissile.28.033.0Thinquartzveins.brecciatedzoneatapproximately31feet.Darkgray,thinlybedded.Wavylaminaeorientedat40°to60°tocoreaxis.Veryhardtohard.Freshtomoderatelyweathered,withIron-stainingonjointsandfracturesurfaces.Jointspacingveryclosetomoderatelyclose.Tracetofrequentpyrite.Minorquartzinhealedfractures.33.038.0Argillaceouszone.Fracturesorientedatapproximately0°tocoreaxis.42.0-46.9Jointspacingclosetomoderatelyclose.51.8-57.1Graywackeintermixedwithphyllite.DESCRIPTION:ROCKTYPEPhyllite16.057.1DEPTH(ft) HOLENO._B_H_-2_SHEETNO._3_OF18(ACRES)052504(RaM)ANCHORAGE,ALASKA100(96)100'(80)Run2110086.9(83)to91.6Run210091.6(89)to96.9Run2310096.9(96)to101.7Run1810071.9(100)to76.8L~FC~E.REC.RUN(RQO)Run1710067.0(100)to71.9Run281.8to86.9un1510057.1(l00)to62.1Run1610062.1(98)to67.0Run1976.8to81.871.9-76.8Intermixedargillite.81.8 -86.9PredominantlyphyHite.Wavyandirregularbeddingat500to600tocoreaxis.Closelyspacedjoints.Brown,folded,veryhardandfresh.Jointspacingveryclosetomoderatelyclose.Pyritecommon.Somequartzintrusions.Argillite,laminaeorientedat400to500tocoreaxis.86.9-91.6Jointspacingveryclosetoclose.DESCRIPTION:GREPORTAHVDROELECTRICPRO.JeCTASKAPOWERAUTHORITVCANYONN.ABUTMENTJOBNO.P5701.05CRESAMERICANINCORPORATED1----1'''""'1.ONSULTINGENGINEERSUFFALOINEWYORKHOLENO._B_H_-2_SHEETNO._3_OF18(ACRES)052504(RaM)ANCHORAGE,ALASKA100(96)100'(80)Run2110086.9(83)to91.6Run210091.6(89)to96.9Run2310096.9(96)to101.7Run1810071.9(100)to76.8L~FC~E.REC.RUN(RQO)Run1710067.0(100)to71.9Run281.8to86.9un1510057.1(l00)to62.1Run1610062.1(98)to67.0Run1976.8to81.871.9-76.8Intermixedargillite.81.8 -86.9PredominantlyphyHite.Wavyandirregularbeddingat500to600tocoreaxis.Closelyspacedjoints.Brown,folded,veryhardandfresh.Jointspacingveryclosetomoderatelyclose.Pyritecommon.Somequartzintrusions.Argillite,laminaeorientedat400to500tocoreaxis.86.9-91.6Jointspacingveryclosetoclose.DESCRIPTION:GREPORTAHVDROELECTRICPRO.JeCTASKAPOWERAUTHORITVCANYONN.ABUTMENTJOBNO.P5701.05CRESAMERICANINCORPORATED1----1'''""'1.ONSULTINGENGINEERSUFFALOINEWYORK 107.9112.0Rocklesscompetent,highlyfracturedandbrokenbydrilling.HOLENO.SHEETNO.(ACRES)114.6119.4Someinterlayeredgraywacke.Slickensidesat117.5'.Gray,veryfinegrained.Generallyveryhard,friablelocally.Freshtoslightlyweathered,withtraceofIron-stainingandsomechloriteandcalcitescaleinjointsandfractures.Veryclosetocloselyspacedjoints.Occasionalquartzintrusions.125.9-132.0Poorrecovery.CorebadlygroundUbydrilling.Coreloss4.1feet.119.4-123.2Highlyfractured.Somefractureshealedwithbluishquartz.Clayonverticaljoint.Coreloss0.3'.(109.5-112.0)Coreloss1.5'.DESCRIPTION:ROCKTYPEDRILLINGREPORTSUSITNAHVDROELECTRICPRO.JECTforALASKAPOWERAUTHORITVSITEDEVILCANYONN.·ABUTMENTJOBNO.P5701.05112.0ArgilliteijJACRESAMERICANINCORPORATED~--r-...:::"':...J,::~;;;-;-:;:;;;;.:;:;;-;;:;::-___IPD[~CONSULTINGENGINEERS~~~.~T~~!.,,!~IIUO[dBUFFALOINEWYORKANCHORAGE,ALASKA132.0DEPTHft)101.7ArgillaceousGraywacke(cont'd)107.9112.0Rocklesscompetent,highlyfracturedandbrokenbydrilling.HOLENO.SHEETNO.(ACRES)114.6119.4Someinterlayeredgraywacke.Slickensidesat117.5'.Gray,veryfinegrained.Generallyveryhard,friablelocally.Freshtoslightlyweathered,withtraceofIron-stainingandsomechloriteandcalcitescaleinjointsandfractures.Veryclosetocloselyspacedjoints.Occasionalquartzintrusions.125.9-132.0Poorrecovery.CorebadlygroundUbydrilling.Coreloss4.1feet.119.4-123.2Highlyfractured.Somefractureshealedwithbluishquartz.Clayonverticaljoint.Coreloss0.3'.(109.5-112.0)Coreloss1.5'.DESCRIPTION:ROCKTYPEDRILLINGREPORTSUSITNAHVDROELECTRICPRO.JECTforALASKAPOWERAUTHORITVSITEDEVILCANYONN.·ABUTMENTJOBNO.P5701.05112.0ArgilliteijJACRESAMERICANINCORPORATED~--r-...:::"':...J,::~;;;-;-:;:;;;;.:;:;;-;;:;::-___IPD[~CONSULTINGENGINEERS~~~.~T~~!.,,!~IIUO[dBUFFALOINEWYORKANCHORAGE,ALASKA132.0DEPTHft)101.7ArgillaceousGraywacke(cont'd) Run37100143.4(90)to145.493(0)100(81)un34100135.0(90)to137.0Run35100137.0(76)to140.3Run3100145.4(100)to147.5Run396147.5(95)to152.0L~FC~E.REC.RUN(RQD)Run4100155.0(92)to160.0Run42100160.0(93)to165.4Run4152.0to155.0un33100132.a(100)to135.0HOLENO.BH-2SHEETNO..--L0F...J..a.(ACRES)052504(RaM)Numeroussoft,Run36darkgraycal-140.3to143.4ANCHORAGE,ALASKA137.0-140.3Jointsmoderatelyclosespaced.140.3145.4Ooliticzone.white,noncalcareousOolitesincareousargillitematrix.152.0-155.0Gougezone.Moderatelyhardtosoft,moderatelyweathered.Residualsoilpresent.Veryfriable.Coreloss0.2'.147.5-152.0Coreloss0.2'.155.0-178.6Darkgraytogreen,withcrystalsofgypsum(?)[upto5mmdiameter]andquartz.Abundantbiotitemicanoted.Moderatelyhard,slightlytomoderatelyweathered.(141.3,144.0)Slickensides.Darkgray,mediumtocoarsegrained.Moderatelyhardtosoft,freshtomoderatelyweathered.Numerouscream-colored,rounded,siliceousblebs(greaterthan3mm)throughout.Jointspacingveryclosetomoderatelyclose.(155.0-160.0)Slickensides.DESCRIPTION:ACRESAMERICANINCORPORATEDt----------'-='"-'CONSULTINGENGINEERSCClIllIaA.:BUFFALOINEWYORKGREPORTNAHVDROELECTRICPRO..JECTLASKAPOWERAUTHORITVILCANYONN.ABUTMENTJOBNO.P5701.05Run37100143.4(90)to145.493(0)100(81)un34100135.0(90)to137.0Run35100137.0(76)to140.3Run3100145.4(100)to147.5Run396147.5(95)to152.0L~FC~E.REC.RUN(RQD)Run4100155.0(92)to160.0Run42100160.0(93)to165.4Run4152.0to155.0un33100132.a(100)to135.0HOLENO.BH-2SHEETNO..--L0F...J..a.(ACRES)052504(RaM)Numeroussoft,Run36darkgraycal-140.3to143.4ANCHORAGE,ALASKA137.0-140.3Jointsmoderatelyclosespaced.140.3145.4Ooliticzone.white,noncalcareousOolitesincareousargillitematrix.152.0-155.0Gougezone.Moderatelyhardtosoft,moderatelyweathered.Residualsoilpresent.Veryfriable.Coreloss0.2'.147.5-152.0Coreloss0.2'.155.0-178.6Darkgraytogreen,withcrystalsofgypsum(?)[upto5mmdiameter]andquartz.Abundantbiotitemicanoted.Moderatelyhard,slightlytomoderatelyweathered.(141.3,144.0)Slickensides.Darkgray,mediumtocoarsegrained.Moderatelyhardtosoft,freshtomoderatelyweathered.Numerouscream-colored,rounded,siliceousblebs(greaterthan3mm)throughout.Jointspacingveryclosetomoderatelyclose.(155.0-160.0)Slickensides.DESCRIPTION:ACRESAMERICANINCORPORATED/--'-='"-'CONSULTINGENGINEERSCClIllIaA.:BUFFALOINEWYORKGREPORTNAHVDROELECTRICPRO..JECTLASKAPOWERAUTHORITVILCANYONN.ABUTMENTJOBNO.P5701.05 DRILLINGREPORTSUSITNAHYDROELECTRICPRO..JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05HOLENO.SHEETNO.(ACRES)05250~aMcc,,,I@.,TANT.INc.•........-......_..T..........._~1.v.VOiQ.ANCHORAGE,ALASKA178.6-182.8Highlyfractured,someclaygougeonjointsurfaces.Interbeddedgraywackeanddarkgray,finegrainedargillite.Hardtomoderatelyhard.Fresh.Jointscloselyspaced.Manyhealedfracturesfilledwithcalcite,somequartz.DESCRIPTION:ROCKTYPE203.4182.8InterbeddedGraywackeandArgillite[iiJ.ACRESAMERICANINCORPORATEDAPO[OCONSULTINGENGINEERSUn[dBUFFALOINEWYORK165.4Graywacke(cont'd)DEPTH(ft)DRILLINGREPORTSUSITNAHYDROELECTRICPRO..JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05HOLENO.SHEETNO.(ACRES)05250~aMcc,,,I@.,TANT.INc.•........-......_..T..........._~1.v.VOiQ.ANCHORAGE,ALASKA178.6-182.8Highlyfractured,someclaygougeonjointsurfaces.Interbeddedgraywackeanddarkgray,finegrainedargillite.Hardtomoderatelyhard.Fresh.Jointscloselyspaced.Manyhealedfracturesfilledwithcalcite,somequartz.DESCRIPTION:ROCKTYPE203.4182.8InterbeddedGraywackeandArgillite[iiJ.ACRESAMERICANINCORPORATEDAPO[OCONSULTINGENGINEERSUn[dBUFFALOINEWYORK165.4Graywacke(cont'd)DEPTH(ft) 100(96)100(98)CoffE.REC.(RQO)100(100)100(100)(RaM)I.EOFRUNRun5100236.3(100)to241.0Run6100241.0(97)to244.7Run5231.2to236.3Run5226.0to231.2un55100216.9(l00)to220.4un54211.7to216.9un53100208.6(l00)to211.7un5210003.4(l00)to208.6HOLENO."""B=H.....;-2=--__SHEETNO...1.-OF.J&.(ACRES)052504JointspacingclosetomoderatelyRun56220.4to226.0213.0-213.6Brokenandhealedzone.220.4-231.2close.Gray,veryfinegrained.Laminaeoriented50°tocoreaxis.Oriented,platymineralsevident.Veryhardtomoderatelyhard.Fresh.Jointspacingveryclosetomoderatelyclose.Tracesofpyrite(cubes),andminorquartzinirregularveins.OESCRIPTION:andCRESAMERICANINCORPORATEDI------"-=--,:-JCONSULTINGENGINEERS~~T~~.J!...~~BUFFALOINEWYORKANCHORAGE,ALASKAGREPORTAHYDROELECTRICPRO..JECTI.ASKAPOWERAUTHORITYILCANYONN.ABUTMENTJOBNO.P5701.05100(96)100(98)CoffE.REC.(RQO)100(100)100(100)(RaM)I.EOFRUNRun5100236.3(100)to241.0Run6100241.0(97)to244.7Run5231.2to236.3Run5226.0to231.2un55100216.9(l00)to220.4un54211.7to216.9un53100208.6(l00)to211.7un5210003.4(l00)to208.6HOLENO."""B=H.....;-2=--__SHEETNO...1.-OF.J&.(ACRES)052504JointspacingclosetomoderatelyRun56220.4to226.0213.0-213.6Brokenandhealedzone.220.4-231.2close.Gray,veryfinegrained.Laminaeoriented50°tocoreaxis.Oriented,platymineralsevident.Veryhardtomoderatelyhard.Fresh.Jointspacingveryclosetomoderatelyclose.Tracesofpyrite(cubes),andminorquartzinirregularveins.OESCRIPTION:andCRESAMERICANINCORPORATEDI------"-=--,:-JCONSULTINGENGINEERS~~T~~.J!...~~BUFFALOINEWYORKANCHORAGE,ALASKAGREPORTAHYDROELECTRICPRO..JECTI.ASKAPOWERAUTHORITYILCANYONN.ABUTMENTJOBNO.P5701.05 DRILLINGREPeRTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05HOLENO.SHEETNO.(ACRES)...aMCC•.-a...I!.TANTaINC............••"'."""A"'''__.u\''''•..,em_ANCHORAGE,ALASKA260.0-262.5Coreloss0.2'.274.7-281.8Coreloss0.4'.270.5Jointwithclaygouge.OESCRIPTION:ROCKTYPEij]ACRESAMERICANINCORPORATEDIPO[OCONSULTINGENGINEERSIIUn[dBUFFALO,NEWYORK281.8DEPTH(ft)244.7Argillite(cont'd)DRILLINGREPeRTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05HOLENO.SHEETNO.(ACRES)...aMCC•.-a...I!.TANTaINC............••"'."""A"'''__.u\''''•..,em_ANCHORAGE,ALASKA260.0-262.5Coreloss0.2'.274.7-281.8Coreloss0.4'.270.5Jointwithclaygouge.OESCRIPTION:ROCKTYPEij]ACRESAMERICANINCORPORATEDIPO[OCONSULTINGENGINEERSIIUn[dBUFFALO,NEWYORK281.8DEPTH(ft)244.7Argillite(cont'd) CoffE.REC.(RQD)100(100)Run7100287.0(100)to292.0Run72100292.0(l00)to297.0Run73100297.0(100)to301.7toRun7100301.7(100)to306.7Run7100306.7(100)to309.4Run7100309.4(100)to310.5Run7100310.5(100)to315.5Run7100315.5(100)to318.7HOLENO.BH-2SHEETNO._9_OF18(ACRES)052504(RaM)300.0Jointwithclaygouge.301.7306.7Quartzintrusionparallelbedding-constitutes15%oftheinterval.TYPEDESCRIPTION:GREPORTAHYDROELECTRICPRO..JECTASKAPOWERAUTHORITYCANYONN.ABUTMENTJOBNO.P5701.05CRESAMERICANINCORPORATEDI---J\-:::...:.:...JONSULTINGENGINEERS~2.~;r~~!.1.!~BUFFALOJNEWYORKANCHORAGE,AL.ASKACoffE.REC.(RQD)100(100)Run7100287.0(100)to292.0Run72100292.0(l00)to297.0Run73100297.0(100)to301.7toRun7100301.7(100)to306.7Run7100306.7(100)to309.4Run7100309.4(100)to310.5Run7100310.5(100)to315.5Run7100315.5(100)to318.7HOLENO.BH-2SHEETNO._9_OF18(ACRES)052504(RaM)300.0Jointwithclaygouge.301.7306.7Quartzintrusionparallelbedding-constitutes15%oftheinterval.TYPEDESCRIPTION:GREPORTAHYDROELECTRICPRO..JECTASKAPOWERAUTHORITYCANYONN.ABUTMENTJOBNO.P5701.05CRESAMERICANINCORPORATEDI---J\-:::...:.:...JONSULTINGENGINEERS~2.~;r~~!.1.!~BUFFALOJNEWYORKANCHORAGE,AL.ASKA DRILLINGREPORTSUSITNAHVDROELECTRICPRO.JECTforALASKAPOWERAUTHORITVSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05HOLENO.SHEETNO.(ACRES)05250III'AMCDr.-uJ!.TANTaINC.........-...._••T._"AlIt..._1tY\''''.VCUiltlllANCHORAGE,ALASKAContortedquartzstringers331.5-336.4Coreloss1.6'.341.5Jointwithclaygouge.318.7-325.8Wavylaminae,generallyat450to500tocoreaxis.327.8-329.0Interbeddedgraywackenumerouscontortedquartzstringersthroughout.329.0336.4throughout.336.4365.6Intercalatedgraywackeandargillite,darkgraytolightgrayishbrown.Irregular,wavylaminaeat500tocoreaxis.Veryhardtohard,fresh,jointspacingveryclosetomoderatelyclose.OESCRIPTION:•.ACRESAMERICANINCORPORATEDIPO£OCONSULTINGENGINEERSIIUO[dBUFFALOINEWYORK351.1318.7Argillite(contId)DEPTHROCKTYPE(ft)DRILLINGREPORTSUSITNAHVDROELECTRICPRO.JECTforALASKAPOWERAUTHORITVSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05HOLENO.SHEETNO.(ACRES)05250III'AMCDr.-uJ!.TANTaINC.........-...._••T._"AlIt..._1tY\''''.VCUiltlllANCHORAGE,ALASKAContortedquartzstringers331.5-336.4Coreloss1.6'.341.5Jointwithclaygouge.318.7-325.8Wavylaminae,generallyat450to500tocoreaxis.327.8-329.0Interbeddedgraywackenumerouscontortedquartzstringersthroughout.329.0336.4throughout.336.4365.6Intercalatedgraywackeandargillite,darkgraytolightgrayishbrown.Irregular,wavylaminaeat500tocoreaxis.Veryhardtohard,fresh,jointspacingveryclosetomoderatelyclose.OESCRIPTION:•.ACRESAMERICANINCORPORATEDIPO£OCONSULTINGENGINEERSIIUO[dBUFFALOINEWYORK351.1318.7Argillite(contId)DEPTHROCKTYPE(ft) 100(85)Run9100380.0(l00)to385.1Run9100390.3(94)to395.5Run9100385.1(98)to390.3Run9370;9to375.0Run9100375.0(100)to380.0un89100356.0(100)to360.8C~E.REC.(RQD)Run9100360.8(98)to365.6Run8100351.1(l00)to356.0HOLENO..-:B=If",-,-2_SHEETNO.~OF.18(ACRES)052504(RaM)(374.4)Clayfilledjoint.385.1-390.3Deformedlaminae.365.6-385.1TraceofpyritewithcubestoRun9985mm.365.6(96)to(365.6-370.9)Coreloss0.1'.370.9DESCRIPTION:CRESAMERICANINCORPORATED1----_-.r~...:.:..JONSULTINGENGINEERS~I~~~~:;,.;-:---;.·_-:;;r:::;~:-;~:;::!;:;~;;u"-;~~~;;:a.:-.-------jUFFALOINEWYORKANCHORAGE,ALASKAGREPORTAHVDROELECTRICPRO-JECTASKAPOWERAUTHORITVILCANYONN.ABUTMENTJOBNO.P5701.05100(85)Run9100380.0(l00)to385.1Run9100390.3(94)to395.5Run9100385.1(98)to390.3Run9370;9to375.0Run9100375.0(100)to380.0un89100356.0(100)to360.8C~E.REC.(RQD)Run9100360.8(98)to365.6Run8100351.1(l00)to356.0HOLENO..-:B=If",-,-2_SHEETNO.~OF.18(ACRES)052504(RaM)(374.4)Clayfilledjoint.385.1-390.3Deformedlaminae.365.6-385.1TraceofpyritewithcubestoRun9985mm.365.6(96)to(365.6-370.9)Coreloss0.1'.370.9DESCRIPTION:CRESAMERICANINCORPORATED1----_-.r~...:.:..JONSULTINGENGINEERS~I~~~~:;,.;-:---;.·_-:;;r:::;~:-;~:;::!;:;~;;u"-;~~~;;:a.:-.-------jUFFALOINEWYORKANCHORAGE,ALASKAGREPORTAHVDROELECTRICPRO-JECTASKAPOWERAUTHORITVILCANYONN.ABUTMENTJOBNO.P5701.05 [iiJ.ACRESAMERICANINCORPORATEDAPDI~CONSULTINGENGINEERSundBUFFALO,NEWYORKDRILLINGREPORTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05426.6-431.9Coreloss0.4'.400.7-406.0Coreloss0.1'.411.0 -444.9Argillitegradingintophyllite.Quartz~einsCOmmon.Chloritemineralization.406.3Claygougeonjoint.DESCRIPTION:ROCKTYPEDEPTH(ft)442.2395.5Argillite(cont'd)[iiJ.ACRESAMERICANINCORPORATEDAPDI~CONSULTINGENGINEERSundBUFFALO,NEWYORKDRILLINGREPORTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05426.6-431.9Coreloss0.4'.400.7-406.0Coreloss0.1'.411.0 -444.9Argillitegradingintophyllite.Quartz~einsCOmmon.Chloritemineralization.406.3Claygougeonjoint.DESCRIPTION:ROCKTYPEDEPTH(ft)442.2395.5Argillite(cont'd) HOLENO.BH-2SHEETNO.~OF18(ACRES)052504(RaM)Graywackeinterlayeredwith(varyingamounts)argillite.Darkgraytobrown,finegrained.Veryhard,fresh,jointspacingveryclosetoclose.Minorquartzintrusionswithchlorite.L~FC~E.REC.RUN(RQD)R106100442.2(100)to444.9R107100444.9(l00)to450.0R108 100450.0(94)to455.3R109100455.3(100)to460.2R110100460.2(loa)to465.3RIII100465.3(100)to470.3R112100470.3(96)to475.0filledR113100475.0(lOa)to477.3R114100477.3(l00)to481.9475.0-492.5Numeroushealedfractureswithcalcite.Argillitehaswavylaminae.DESCRIPTION:ACRESAMERICANINCORPORATEDt-----~'-=...'-IONSULTINGENGINEERS~car~_-~"'.".;:-'I!.;T~~.!!.\.!~BUFFALO,NEWYORKANCHORAGE,ALASKAGREPeRTAHYDROELECTRICPRO....ECTLASKAPOWERAUTHORITYILCANYONN.ABUTMENTJOBNO.P5701.05HOLENO.BH-2SHEETNO.~OF18(ACRES)052504(RaM)Graywackeinterlayeredwith(varyingamounts)argillite.Darkgraytobrown,finegrained.Veryhard,fresh,jointspacingveryclosetoclose.Minorquartzintrusionswithchlorite.L~FC~E.REC.RUN(RQD)R106100442.2(100)to444.9R107100444.9(l00)to450.0R108 100450.0(94)to455.3R109100455.3(100)to460.2R110100460.2(loa)to465.3RIII100465.3(100)to470.3R112100470.3(96)to475.0filledR113100475.0(lOa)to477.3R114100477.3(l00)to481.9475.0-492.5Numeroushealedfractureswithcalcite.Argillitehaswavylaminae.DESCRIPTION:ACRESAMERICANINCORPORATEDt-----~'-=...'-IONSULTINGENGINEERS~car~_-~"'.".;:-'I!.;T~~.!!.\.!~BUFFALO,NEWYORKANCHORAGE,ALASKAGREPeRTAHYDROELECTRICPRO....ECTLASKAPOWERAUTHORITYILCANYONN.ABUTMENTJOBNO.P5701.05 (491.8-492.5)Shearzonewithclaygouge.•.ACRESAMERICANINCORPORATEDIPDI~CONSULTINGENGINEERSIIundBUFFALO,NEWYORKHOLENO.SHEETNO.1(ACRES)052504498.0Jointwithclaycoatingat45°tocoreaxis.Darkgrayargillitewithdistorted,irregularlaminaeorientedapproximately45°to50°tocoreaxis.Fresh,veryhard.Jointspacingveryclosetoclose.Frequentirregularquartzintrusionswithsomechlorite.494.4-498.0Jointswithclaygouge.509.1-519.1Irregularfragmentsofgraywackethroughout.DESCRIPTION:ROCKTYPEDRILLINGREPORTSUSITNAHVDROELECTRICPRO.JECTforALASKAPOWERAUTHORITVSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05495.4Argillite519.1DEPTH(ft)481.9GraywackewithArgillite(cont'd)(491.8-492.5)Shearzonewithclaygouge.•.ACRESAMERICANINCORPORATEDIPDI~CONSULTINGENGINEERSIIundBUFFALO,NEWYORKHOLENO.SHEETNO.1(ACRES)052504498.0Jointwithclaycoatingat45°tocoreaxis.Darkgrayargillitewithdistorted,irregularlaminaeorientedapproximately45°to50°tocoreaxis.Fresh,veryhard.Jointspacingveryclosetoclose.Frequentirregularquartzintrusionswithsomechlorite.494.4-498.0Jointswithclaygouge.509.1-519.1Irregularfragmentsofgraywackethroughout.DESCRIPTION:ROCKTYPEDRILLINGREPORTSUSITNAHVDROELECTRICPRO.JECTforALASKAPOWERAUTHORITVSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05495.4Argillite519.1DEPTH(ft)481.9GraywackewithArgillite(cont'd) R130 100547.2(100)to552.0ACRESAMERICANINCORPORATED!--r-\-:.....:...ICONSULTINGENGINEERS~~J~~!.\'~~BUFFALOINEWYORKANCHORAGE,ALASKA542.0-557.1LaminaeveryirregulartocoreR129100axis.542.0(71)to(546.0,548.7)Highlyfracturedwithclaygouge.547.2100(94)100(72)91(83)100(~7)L~FC~E.REC.RUN(RQO)R127534.7to538.3R128100538.3(78)to542.O'R131100552.0(94)to557.1R124100519.1(100)to524.3R126529.5to534.7R125524.3to529.5R132557.1to562.0HOLENO._B_H_-2_SHEETNO.~OF.18(ACRES)052504(RaM)529.0Jointwithclaygouge.534.7-538.3Coreloss0.3'.529.5-534.7Slightalterationzoneassociatedwithquartzvein.557.1-558.7,560.5-562.0Highlyfractured.DESCRIPTION:NGREPeRTAHYDROELECTRICPRO..JECTLASKAPOWERAUTHORITYILCANYONN.ABUTMENTJOBNO.P5701.05R130 100547.2(100)to552.0ACRESAMERICANINCORPORATED!--r-\-:.....:...ICONSULTINGENGINEERS~~J~~!.\'~~BUFFALOINEWYORKANCHORAGE,ALASKA542.0-557.1LaminaeveryirregulartocoreR129100axis.542.0(71)to(546.0,548.7)Highlyfracturedwithclaygouge.547.2100(94)100(72)91(83)100(~7)L~FC~E.REC.RUN(RQO)R127534.7to538.3R128100538.3(78)to542.O'R131100552.0(94)to557.1R124100519.1(100)to524.3R126529.5to534.7R125524.3to529.5R132557.1to562.0HOLENO._B_H_-2_SHEETNO.~OF.18(ACRES)052504(RaM)529.0Jointwithclaygouge.534.7-538.3Coreloss0.3'.529.5-534.7Slightalterationzoneassociatedwithquartzvein.557.1-558.7,560.5-562.0Highlyfractured.DESCRIPTION:NGREPeRTAHYDROELECTRICPRO..JECTLASKAPOWERAUTHORITYILCANYONN.ABUTMENTJOBNO.P5701.05 DRILLINGREPORTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05[Ai]ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUO[dBUFFALO,NEWYORKHOLENO.SHEETNO.16(ACRES)052504~~~.---=T~~.!!...!~ANCHORAGE,A~ASKA594.2-594.6Shearzonewithclaygouge.584.9-589.6Coreloss0.2I •562.0-582.9Manyrehealedfracturesfilledwithcalciteandquartz.Irregularorientations.582.9-627.8Numerousthinbandsofhighlyfracturedrockrehealedwithquartzthroughout.Rehealedzonesarelesscompetentandbadlybrokenbydrilling.Hardtosoftandfriablelocally.DESCRIPTION:ROCKTYPE599.6562.0Argillite(cont'd)DEPTH(ft)DRILLINGREPORTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05[Ai]ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUO[dBUFFALO,NEWYORKHOLENO.SHEETNO.16(ACRES)052504~~~.---=T~~.!!...!~ANCHORAGE,A~ASKA594.2-594.6Shearzonewithclaygouge.584.9-589.6Coreloss0.2I •562.0-582.9Manyrehealedfracturesfilledwithcalciteandquartz.Irregularorientations.582.9-627.8Numerousthinbandsofhighlyfracturedrockrehealedwithquartzthroughout.Rehealedzonesarelesscompetentandbadlybrokenbydrilling.Hardtosoftandfriablelocally.DESCRIPTION:ROCKTYPE599.6562.0Argillite(cont'd)DEPTH(ft) ACRESAMERICANINCORPORATEDt-------'''-""'=-.ICONSULTINGENGINEERS~~T~~..!!.~~~BUFFALOINEWYORKANCHORAGE•Al.ASKAHOLENO.BH-2SHEETNO.-22..OF18(ACRES)052504(RaM)DESCRIPTION:85(70)L~F C~E.REC.RUN(RQD)R149 100630.8(l00)to636.0R150100636.0(100)to641.2R142100599.6(91)to601.8R143100601.8(91)to604.0R144100604.0(81)to609.2R145100609.2(80)to614.2R146 100614.2(93)to619.5R148624.8to630.8R147 100619.5(93)to624.8Shearzone,friable,coreloss611.2-611.7Shearzone.626.8-627.80.2'.Lightgrayishbrown,finetomed.grained,com-posedprimarilyoffeldsparsandquartzwith2to5%mafics.Massive,veryhard.Jointspacingwide.Fairlysharpcontactwithoverlyingargillite.I"widecontactzonewithnoapparentcontactmetamorphisminargillitte.INGREPORTNAHYDROELECTRICPRO..JECTLASKAPOWERAUTHORITYILCANYONN.ABUTMENTJOBNO.P5701.05ACRESAMERICANINCORPORATEDt-------'''-""'=-.ICONSULTINGENGINEERS~~T~~..!!.~~~BUFFALOINEWYORKANCHORAGE•Al.ASKAHOLENO.BH-2SHEETNO.-22..OF18(ACRES)052504(RaM)DESCRIPTION:85(70)L~FC~E.REC.RUN(RQD)R149 100630.8(l00)to636.0R150100636.0(100)to641.2R142100599.6(91)to601.8R143100601.8(91)to604.0R144100604.0(81)to609.2R145100609.2(80)to614.2R146 100614.2(93)to619.5R148624.8to630.8R147 100619.5(93)to624.8Shearzone,friable,coreloss611.2-611.7Shearzone.626.8-627.80.2'.Lightgrayishbrown,finetomed.grained,com-posedprimarilyoffeldsparsandquartzwith2to5%mafics.Massive,veryhard.Jointspacingwide.Fairlysharpcontactwithoverlyingargillite.I"widecontactzonewithnoapparentcontactmetamorphisminargillitte.INGREPORTNAHYDROELECTRICPRO..JECTLASKAPOWERAUTHORITYILCANYONN.ABUTMENTJOBNO.P5701.05 DRILLINGREPORTSUSITNAHYDROELECTRICPRC.lECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05EndofHoleHOLENO.SHEETNO.(ACRES)052504"aMCC'.-.LTANT.INc.,•........-....._••T................a",l.v."'Qill.ANCHORAGE,ALASKA..645.3-650.0Argillite,withblebsandbandsofquartzthroughout.Nobeddingstructureevident.Fresh,veryhard,jointspacingclosetowide.DESCRIPTION:ROCKTYPEm.ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUnldBUFFALOINEWYORK656.21---------1-DEPTH(ft)DRILLINGREPORTSUSITNAHYDROELECTRICPRC.lECTforALASKAPOWERAUTHORITYSITEDEVILCANYONN.ABUTMENTJOBNO.P5701.05EndofHoleHOLENO.SHEETNO.(ACRES)052504"aMCC'.-.LTANT.INc.,•........-....._••T................a",l.v."'Qill.ANCHORAGE,ALASKA..645.3-650.0Argillite,withblebsandbandsofquartzthroughout.Nobeddingstructureevident.Fresh,veryhard,jointspacingclosetowide.DESCRIPTION:ROCKTYPEm.ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUnldBUFFALOINEWYORK656.21---------1-DEPTH(ft) HOLENO._-=8c:...H:....-...;2=--DATESEPT1980LOCATION_=DE=.V.:..,:I..:=L:..---=C:.:..;A:.:..;N:...;.Y-"'O..:..;N:..--_INCORPORATE0ARGILLITEGOUGEGOUGECLAYNUMBEROFJOINTSPER10FT.5101520REMARKS2--TOPOFROCKHIGHLYFRACTUREDARGIWTEQUARTZVEINSARGILLITEGRAYWACKE.INTERCALATEDPHYLLITEWITHPHYLLITEARGILLITEINTERCALATEDWITHPHYLLITEARGILUCEOLGRAYWACKEHIGHLYFRACTUREDSLICKSARGILLITESUCKSOOLITICZONEOUGESLICKS,GRAYWACKEHIGHLYFRACTUREDINTERBEDDEGRAYWACKFRACTUREDaaARGIWTEHEALEDZONEGRAYWACKEINTERBEDDED~~~t--+--iICONTORTEOOUARTZSTRINGERSINTERCALATEDGRAYWACKEANDARGILLITEBEDROCKLOGSPERMEABILITYCORERECOVERY(xlem/sec""'"aR.O.D..g~%10-510-310-1Q:t-204060soAMERICANzoi=:;'"..J'"121440208060300200260280140220340320180240160120ACRESHOLENO._-=8c:...H:....-...;2=--DATESEPT1980LOCATION_=DE=.V.:..,:I..:=L:..---=C:.:..;A:.:..;N:...;.Y-"'O..:..;N:..--_INCORPORATE0ARGILLITEGOUGEGOUGECLAYNUMBEROFJOINTSPER10FT.5101520REMARKS2--TOPOFROCKHIGHLYFRACTUREDARGIWTEQUARTZVEINSARGILLITEGRAYWACKE.INTERCALATEDPHYLLITEWITHPHYLLITEARGILLITEINTERCALATEDWITHPHYLLITEARGILUCEOLGRAYWACKEHIGHLYFRACTUREDSLICKSARGILLITESUCKSOOLITICZONEOUGESLICKS,GRAYWACKEHIGHLYFRACTUREDINTERBEDDEGRAYWACKFRACTUREDaaARGIWTEHEALEDZONEGRAYWACKEINTERBEDDED~~~t--+--iICONTORTEOOUARTZSTRINGERSINTERCALATEDGRAYWACKEANDARGILLITEBEDROCKLOGSPERMEABILITYCORERECOVERY(xlem/sec""'"aR.O.D..g~%10-510-310-1Q:t-204060soAMERICANzoi=:;'"..J'"121440208060300200260280140220340320180240160120ACRES GOUGEGOUGENUMBEROFJOINTSPER10FT.5101520REMARKSINCORPORATEDBEDROCKLOGSPERMEABILITY(xlem/sec.10-510-3AMERICAN380360CLAY420440460480SHEARZONE500GOUGE520CLAYQUARTZVEINa540ALTEREDZONEHIGHLYFRACTUREDWITHCLAYGOUGE560HIGHLYFRACTURED580600SHEARZONESHEARZONE620-SHEARZONE640ENDOFHOLE656.2'HOLENO._B=H'-'----.:;:2=-·DATESEPT1980LOCATION--=D::.=E::...:Y:...:.IL=--_C.=.:A~N~Y--:O::..:N.:-_ACRESGOUGEGOUGENUMBEROFJOINTSPER10FT.5101520REMARKSINCORPORATEDBEDROCKLOGSPERMEABILITY(xlem/sec.10-510-3AMERICAN380360CLAY420440460480SHEARZONE500GOUGE520CLAYQUARTZVEINa540ALTEREDZONEHIGHLYFRACTUREDWITHCLAYGOUGE560HIGHLYFRACTURED580600SHEARZONESHEARZONE620-SHEARZONE640ENDOFHOLE656.2'HOLENO._B=H'-'----.:;:2=-·DATESEPT1980LOCATION--=D::.=E::...:Y:...:.IL=--_C.=.:A~N~Y--:O::..:N.:-_ACRES BH-2WATERPRESSURETESTRESULTS4feet(vertical)60°1214GaugeDurationCoefficientofStickupPressureofTestFlowRatePermeability(feet)(psi)(min)(gpm)(em/sec)71210.82-5.60to5.14x10To-57.03x10218101.17.89x10-5722104.02.14x10-422S101.156.15x10-5735101.455.37x10-624212.672.25x10-575010.308.57x10-625510.255.40x10-6765102.906.01x10-5270101.25-52.44x1078210.345.89x10-628510.152.58x10-6710010.486.50x10-6DevilCanonElevationBH-2WATERPRESSURETESTRESULTS4feet(vertical)60°1214GaugeDurationCoefficientofStickupPressureofTestFlowRatePermeability(feet)(psi)(min)(gpm)(em/sec)71210.82-5.60to5.14x10To-57.03x10218101.17.89x10-5722104.02.14x10-422S101.156.15x10-5735101.455.37x10-624212.672.25x10-575010.308.57x10-625510.255.40x10-6765102.906.01x10-5270101.25-52.44x1078210.345.89x10-628510.152.58x10-6710010.486.50x10-6DevilCanonElevation DepthTestedGaugeDurationFromToStickupPressureofTestFlowRate(feet)(feet)(feet)(psi)(min)(gpm)208.9225210510.45223.9240711010.38238.9255211510.08253.9270712510.20268.9285213032.68to3.1283.9300710010.98298.9315214510.21313.9330715510.25328.9345216010.38343.9360717010.26358.9375217510.68373.9390718510.58388.9405219010.38403.9420720010.56418.9435220010.36433.9450720010.60448.9465220010.60463.9480720010.38478.9495220010.56493.9510720010.30508.9525220010.58523.9540720010.30538.9555220010.25'.DevilCanyon-(Continued)Borehol&-Bii-TDepthTestedGaugeDurationFromToStickupPressureofTestFlowRate(feet)(feet)(feet)(psi)(min)(gpm)208.9225210510.45223.9240711010.38238.9255211510.08253.9270712510.20268.9285213032.68to3.1283.9300710010.98298.9315214510.21313.9330715510.25328.9345216010.38343.9360717010.26358.9375217510.68373.9390718510.58388.9405219010.38403.9420720010.56418.9435220010.36433.9450720010.60448.9465220010.60463.9480720010.38478.9495220010.56493.9510720010.30508.9525220010.58523.9540720010.30538.9555220010.25'.DevilCanyon-(Continued)Borehol&-Bii-T ,DevilCanyon-(Continued)GaugeDurationCoefficientofStickupPressureofTestFlowRatePermeability(feet)(psi)(min)(gpm)(em/sec)720010.362.63x10-6220010.644.49x10-6720010.564.15x10-6220010.402.79x10-6720010.402.77x10-6220010.463.21x10-61120010.382.75x10-6,DevilCanyon-(Continued)GaugeDurationCoefficientofStickupPressureofTestFlowRatePermeability(feet)(psi)(min)(gpm)(em/sec)720010.362.63x10-6220010.644.49x10-6720010.564.15x10-6220010.402.79x10-6720010.402.77x10-6220010.463.21x10-61120010.382.75x10-6 0.0-12.0Nosamplestaken.ACRESAMERICANINCORPORATEDI...D~~=..-JCONSULTINGENGINEERS~:.:~.C::;'~.~!-;Il:T.e~~~!~E;BUFFALOINEWYORKANCHORAGE,ALASKARun17512.0(17)to15.2Run210015.2(67)to18.8'Run310118.8(38)to20.4Run410120.4(70)to25.4ELEVATIONS;DATUM..~DRILLPLATFORM_--::-:-=--:--:-:;--_GROUNDSURFACEl~3~5...;;3~f~t_ROCKSURFACE1346ftBOTTOMOFHOLE~91~2~.~1--.l.f,l;.t_WATERTABLE1322ft'LENGTHC<5RE.OFREC.RUN(ROD,)DESCRIPTION:12.0-15.2Coreloss0.8'.20.0,23.4,29.8Slickensidesandironstaining.Jointsparalleltextureat20°to30°tocoreaxis.Someclayfilling.Graywacke-mediumtodarkgray,clayeymatrixcontainingfinetomediumsandgrainsandsub-roundedclastsofquartz,argilliteandotherrocktypes.Interbeddedwithargillite-mediumtodarkgray,finegrained.Laminaeorientedatapproximately20°tocoreaxis.Rockiswellindurated,moderatlyhardtohard,andcompetent.Fresh.toslightlyweatheredwithlimonitestain-ingonjointsurfaces.Minorsulfidemineraliza-tion.Jointspacingveryclosetomoderatelyclose.Occasionaljointshealedwithquartzandcarbonate.arealonghole.TheDrillingCompanyHOLENO.BH-4SHEETNO._1_OF~(ACRES)OS2S04(RaM)AUG1419~8"...,0::--_AUG1919_8_0__SOIL_...;;C;.;;a;;:s;.=i.;;;n~g.....:A:.:;d;;;.v;..;a::.;;.n;;;:c:..:e:.;;rCASINGDIAM.__-:.;NW~~(_3_.5_'_'_O_._D_•.:...)_ROCKDiamondCoreDrillCOREDIAM.NQ(1.875)LATITUDE624857.593DEPARTURE-=..14;:.:9::.;:1:.;:8:.,::2..:::,3.;....7.:...;9::.,:S=--_BEARING19SoINITIALDIP_---:6~0:...0_OTHERDIPS_STARTED.M.____________._FINISHEDM._H...;.;a;;;..gJ.,;e;=.::n~-...;;Ra=h:=a=im:,::-,,'(RaM)APPROVED{RaM)SummarybyAcombDATESummarybyHenschelAPPROVED-----------(ACRES)-----....;..(ACRES)DATE!NGI=;E~CI=;TNAHVCI=IOELECTI=IICI=3I=1C.JECTLASKAI=JOWERAUTHOI=IITV:JOBNO.PS701.OS0.0-12.0Nosamplestaken.ACRESAMERICANINCORPORATEDI...D~~=..-JCONSULTINGENGINEERS~:.:~.C::;'~.~!-;Il:T.e~~~!~E;BUFFALOINEWYORKANCHORAGE,ALASKARun17512.0(17)to15.2Run210015.2(67)to18.8'Run310118.8(38)to20.4Run410120.4(70)to25.4ELEVATIONS;DATUM..~DRILLPLATFORM_--::-:-=--:--:-:;--_GROUNDSURFACEl~3~5...;;3~f~t_ROCKSURFACE1346ftBOTTOMOFHOLE~91~2~.~1--.l.f,l;.t_WATERTABLE1322ft'LENGTHC<5RE.OFREC.RUN(ROD,)DESCRIPTION:12.0-15.2Coreloss0.8'.20.0,23.4,29.8Slickensidesandironstaining.Jointsparalleltextureat20°to30°tocoreaxis.Someclayfilling.Graywacke-mediumtodarkgray,clayeymatrixcontainingfinetomediumsandgrainsandsub-roundedclastsofquartz,argilliteandotherrocktypes.Interbeddedwithargillite-mediumtodarkgray,finegrained.Laminaeorientedatapproximately20°tocoreaxis.Rockiswellindurated,moderatlyhardtohard,andcompetent.Fresh.toslightlyweatheredwithlimonitestain-ingonjointsurfaces.Minorsulfidemineraliza-tion.Jointspacingveryclosetomoderatelyclose.Occasionaljointshealedwithquartzandcarbonate.arealonghole.TheDrillingCompanyHOLENO.BH-4SHEETNO._1_OF~(ACRES)OS2S04(RaM)AUG1419~8"...,0::--_AUG1919_8_0__SOIL_...;;C;.;;a;;:s;.=i.;;;n~g.....:A:.:;d;;;.v;..;a::.;;.n;;;:c:..:e:.;;rCASINGDIAM.__-:.;NW~~(_3_.5_'_'_O_._D_•.:...)_ROCKDiamondCoreDrillCOREDIAM.NQ(1.875)LATITUDE624857.593DEPARTURE-=..14;:.:9::.;:1:.;:8:.,::2..:::,3.;....7.:...;9::..:S=--_BEARING19SoINITIALDIP_---:6~0:...0_OTHERDIPS_STARTED.M.____________._FINISHEDM._H...;.;a;;;..gJ.,;e;=.::n~-...;;Ra=h:=a=im:,::-,,'(RaM)APPROVED{RaM)SummarybyAcombDATESummarybyHenschelAPPROVED-----------(ACRES)-----....;..(ACRES)DATE!NGI=;E~CI=;TNAHVCI=IOELECTI=IICI=3I=1C.JECTLASKAI=JOWERAUTHOI=IITV:JOBNO.PS701.OS DRILLINGREPORTSUSITNAHYDROELECTRICPRO..JECTforALASKAPOWERAUTHORITYSITEDevilCanyonSouthAbutme!l.'t..-JOBNO.P5701.05•ACRESAMERICANINCORPORATEDIPD(PCONSULTINGENGINEERSIIundBUFFALOINEWYORKHOLENO.SHEETNO.(ACRES)~;;;..:;.....ANCHORAGE,ALASKA25.4-30.5Coreloss0.2'.Mediumgraytodarkgray,siliceous.Clayeymatrixcontainingfinetocoarsesandgrainsandelipsoidclastsapproximately2mmxImminsize.Wellinduratedmoderatelyhardtohard,compe-tent.Freshtoslightlyweatheredwithsomeironstainingonjointsurfaces.Minorsulfidemineralizationthroughtout.Jointspacingveryclosetomodera~elyclose.Numerousjointshealedwithcalcite,orientedatapproximately15°to30°tocoreaxis.45.0-46.2Numerousjointsat15°to20°tocoreaxis.Open,highlyweatheredandclayfilled.30.7-45.0Minorinterbeddedargillite.62.7Friablezone.(30.7,30.9, 38.8,39.1)Slickensidesandironstaininginjoints.DESCRIPTION:30.7Graywacke65.2DEPTHROCKTYPE(ft)25.4GraywackeandArgillite(cont'd)DRILLINGREPORTSUSITNAHYDROELECTRICPRO..JECTforALASKAPOWERAUTHORITYSITEDevilCanyonSouthAbutme!l.'t..-JOBNO.P5701.05•ACRESAMERICANINCORPORATEDIPD(PCONSULTINGENGINEERSIIundBUFFALOINEWYORKHOLENO.SHEETNO.(ACRES)~;;;..:;.....ANCHORAGE,ALASKA25.4-30.5Coreloss0.2'.Mediumgraytodarkgray,siliceous.Clayeymatrixcontainingfinetocoarsesandgrainsandelipsoidclastsapproximately2mmxImminsize.Wellinduratedmoderatelyhardtohard,compe-tent.Freshtoslightlyweatheredwithsomeironstainingonjointsurfaces.Minorsulfidemineralizationthroughtout.Jointspacingveryclosetomodera~elyclose.Numerousjointshealedwithcalcite,orientedatapproximately15°to30°tocoreaxis.45.0-46.2Numerousjointsat15°to20°tocoreaxis.Open,highlyweatheredandclayfilled.30.7-45.0Minorinterbeddedargillite.62.7Friablezone.(30.7,30.9, 38.8,39.1)Slickensidesandironstaininginjoints.DESCRIPTION:30.7Graywacke65.2DEPTHROCKTYPE(ft)25.4GraywackeandArgillite(cont'd) ACRESAMERICANINCORPORATEDt--------J~...:=....JCONSULTINGENGINEERS~~~T~~.!!\'~~BUFFALOINEWYORKANCHORAGE,ALASKA86.0Quartzveinwithsulfides0.01'thick.OESCRIPTION:R1910084.1(100)to89.4R2010089.4(100)to93.2R2110093.2(68)to98.2R22100and98.2(83)to103.4veinsHOLENO.BH-4SHEETNO._3_0F..li..(ACRES)052504(RaM)LEcafE.OFREC.RUN(RQO)R149865.2(84)to70.2R1510070.2(98)to75.0R1610075.0(87)to80.2R178980.2(57)to80.9R1810080.9(84)tl84.1quartzNwnerous65.2-70.2Coreloss0.1'.80.2-80.9Coreloss0.1'.102.0-103.0stringers.NGREPORTNAHYDROELECTRICPRO.JECTLASKAPOWERAUTHORITYSouthAbutmentJOBNO.P5701.05ACRESAMERICANINCORPORATEDt--------J~...:=....JCONSULTINGENGINEERS~~~T~~.!!\'~~BUFFALOINEWYORKANCHORAGE,ALASKA86.0Quartzveinwithsulfides0.01'thick.OESCRIPTION:R1910084.1(100)to89.4R2010089.4(100)to93.2R2110093.2(68)to98.2R22100and98.2(83)to103.4veinsHOLENO.BH-4SHEETNO._3_0F..li..(ACRES)052504(RaM)LEcafE.OFREC.RUN(RQO)R149865.2(84)to70.2R1510070.2(98)to75.0R1610075.0(87)to80.2R178980.2(57)to80.9R1810080.9(84)tl84.1quartzNwnerous65.2-70.2Coreloss0.1'.80.2-80.9Coreloss0.1'.102.0-103.0stringers.NGREPORTNAHYDROELECTRICPRO.JECTLASKAPOWERAUTHORITYSouthAbutmentJOBNO.P5701.05 DRILLINGREPDRTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEDevilCanyonSouthAbutmentJOBNO.P570l.05HOLENO.SHEETNO.(ACRES)ANCHORAGE,ALASKA104.4-104.6Jointwithslickensidesandclayfilling.130.2-135.5Coreloss0.2'.Graywacke(asdescribedabove)withsomeinter-beddedArgillite.Transitionaltounderlyingphyllite.Argilliteismediumtodarkgray,finegrained.Laminaeorientedapproximately20°tocoreaxis.Moderatelyhardtoveryhard,fresh,generallycompetent.Numerouscontortedquartzstringersthroughout.Jointspacingclosetomoderatelyclose.Darkgraytoblack,veryfinetofinegrained.Foliationapproximately5°to10°tocoreaxis,withmicrofoldscrosscuttingfoliationatapproximately30°(microfolds20°to30°tocoreaxis).Hardtoveryhard,fresh.Minorsulfidemineralizationthroughout.Quartzandcarbonateveinscommon.Jointspacingclosetomoderatelyclose.Numeroushealedjointsthroughout.OESCRJPTJON:ACRESAMERICANINCORPORATEDCONSULTINGENGINEERSBUFFALO,NEWYORKROCKTYPEPhylliteGraywackewiInterbeddedArgilliteGraywacke114.9108.4103.4DEPTH(ft)145.6DRILLINGREPDRTSUSITNAHYDROELECTRICPRO.JECTforALASKAPOWERAUTHORITYSITEDevilCanyonSouthAbutmentJOBNO.P570l.05HOLENO.SHEETNO.(ACRES)ANCHORAGE,ALASKA104.4-104.6Jointwithslickensidesandclayfilling.130.2-135.5Coreloss0.2'.Graywacke(asdescribedabove)withsomeinter-beddedArgillite.Transitionaltounderlyingphyllite.Argilliteismediumtodarkgray,finegrained.Laminaeorientedapproximately20°tocoreaxis.Moderatelyhardtoveryhard,fresh,generallycompetent.Numerouscontortedquartzstringersthroughout.Jointspacingclosetomoderatelyclose.Darkgraytoblack,veryfinetofinegrained.Foliationapproximately5°to10°tocoreaxis,withmicrofoldscrosscuttingfoliationatapproximately30°(microfolds20°to30°tocoreaxis).Hardtoveryhard,fresh.Minorsulfidemineralizationthroughout.Quartzandcarbonateveinscommon.Jointspacingclosetomoderatelyclose.Numeroushealedjointsthroughout.OESCRJPTJON:ACRESAMERICANINCORPORATEDCONSULTINGENGINEERSBUFFALO,NEWYORKROCKTYPEPhylliteGraywackewiInterbeddedArgilliteGraywacke114.9108.4103.4DEPTH(ft)145.6 HOLENO.BH-4SHEETNO._5_OFJd...(ACRES)052504(RaM)98(84)100(84)100(67)98(45)100(100)3771.0to76.13666.0to71.03876.1to79.63979.6to84.04010084.a(98)to89.1L~FCoRE.REC.RUN(RQDI32100145.6(92)to150.833100150.8(loa)to156.0100(96)stringers,brokenandandbadlyANCHORAGE,ALASKA169.5-170.4Quartzveins.166.0-171.0Coreloss0.1'.Darkgraytoblack,veryfinegrained,non-foliatedtoindistinctfoliation.Hardtoveryhard,wellindurated,freshandcompetent.Verygradationalcontactwithoverlyingphyllite.Jointspacingclosetomoderatelyclose.171.3-172.3Quartzveinssulfidemineralization-coregroundbydrilling;weakzone.178.1-181.6Corebadlybrokenandgroundbydrilling.Pieces0.05'to0.1'inchesdiameter.Jointshavechloriteortalccoating.(179.6-184.0)Coreloss0.1'.OESCRIPTION:ACRESAMERICANINCORPORATEDf------'o"---=-.iEEE..-aM~TANT.,INC.CONSULTINGNGINRS•'.n••A....._.u.vovo...BUFFALOINEWYORKGREPORTNAHYDROELECTRICPRO..JECTLASKAPOWERAUTHORITY'\TilCanyonSouthAbutmentJOBNO.P5701.asHOLENO.BH-4SHEETNO._5_OFJd...(ACRES)052504(RaM)98(84)100(84)100(67)98(45)100(100)3771.0to76.13666.0to71.03876.1to79.63979.6to84.04010084.a(98)to89.1L~FCoRE.REC.RUN(RQDI32100145.6(92)to150.833100150.8(loa)to156.0100(96)stringers,brokenandandbadlyANCHORAGE,ALASKA169.5-170.4Quartzveins.166.0-171.0Coreloss0.1'.Darkgraytoblack,veryfinegrained,non-foliatedtoindistinctfoliation.Hardtoveryhard,wellindurated,freshandcompetent.Verygradationalcontactwithoverlyingphyllite.Jointspacingclosetomoderatelyclose.171.3-172.3Quartzveinssulfidemineralization-coregroundbydrilling;weakzone.178.1-181.6Corebadlybrokenandgroundbydrilling.Pieces0.05'to0.1'inchesdiameter.Jointshavechloriteortalccoating.(179.6-184.0)Coreloss0.1'.OESCRIPTION:ACRESAMERICANINCORPORATEDf------'o"---=-.iEEE..-aM~TANT.,INC.CONSULTINGNGINRS•'.n••A....._.u.vovo...BUFFALOINEWYORKGREPORTNAHYDROELECTRICPRO..JECTLASKAPOWERAUTHORITY'\TilCanyonSouthAbutmentJOBNO.P5701.as R48225.3to230.1R49230.1to235.5HOLENO.~HSHEETNO.~(ACRES)052504"vein0.02'thickattocoreaxis.SulfideGraybrowntodarkgraytoblack,veryfinetofinegrained,welldevelopedfoliation,withcharacteristicsilveryluster(white-micaphyllite)onclearagesurfaces.Therockcontainshighlycontortedquartzveinsandstringersthroughout,whichcrosscutthefoliation.Orientationoffoliationishighlyirregularinthesezones.Rockishardtoveryhard,freshandcompetent.Jointspacingclosetomoderatelyclose.Numeroushealedjoints.199.6201.6Quartzapproximately10°to20°mineralization.222.3250.0Contortedquartzstringersandveinsform20%to40%ofrock.Foliationhighlyirregular.DESCRIPTION:ACRESAMERICANINCORPORATEDCONSULTINGENGINEERSBUFFALO,NEWYORKROCKTYPEPhylliteDRILLINGREPORTSUSITNAHYDROELECTRICPRC.JECTforALASKAPOWERAUTHORITYSITEDevilCanyonSouthAbutmentJOBNO.P5701.05205.02.35.5DEPTH(ft)189.1Meta-Argillite(cont'd)R48225.3to230.1R49230.1to235.5HOLENO.~HSHEETNO.~(ACRES)052504"vein0.02'thickattocoreaxis.SulfideGraybrowntodarkgraytoblack,veryfinetofinegrained,welldevelopedfoliation,withcharacteristicsilveryluster(white-micaphyllite)onclearagesurfaces.Therockcontainshighlycontortedquartzveinsandstringersthroughout,whichcrosscutthefoliation.Orientationoffoliationishighlyirregularinthesezones.Rockishardtoveryhard,freshandcompetent.Jointspacingclosetomoderatelyclose.Numeroushealedjoints.199.6201.6Quartzapproximately10°to20°mineralization.222.3250.0Contortedquartzstringersandveinsform20%to40%ofrock.Foliationhighlyirregular.DESCRIPTION:ACRESAMERICANINCORPORATEDCONSULTINGENGINEERSBUFFALO,NEWYORKROCKTYPEPhylliteDRILLINGREPORTSUSITNAHYDROELECTRICPRC.JECTforALASKAPOWERAUTHORITYSITEDevilCanyonSouthAbutmentJOBNO.P5701.05205.02.35.5DEPTH(ft)189.1Meta-Argillite(cont'd) Quartzvein,highlymineralizedR52100245.6(100)to247.8HOLENO.BH-4SHEETNO._7_OFJd...(ACRES)052504(RaM)100(98)R55100255.2(82)to260.3R56100260.3(69)to262.6R57100262.6(90)to267.6R58100267.6(84)to271.9R53100247.8(98)to250.3R54250.3to255.2L~FCof'E.REC.RUN(RQD)R51100240.3(96to245.6R50100235.5(58to240.3ANCHORAGE,ALASKA246.3-246.8withsulfides.252.0-267.0Zonecontainsintermixedlayersofspottedphyllite.262.1-262.5,263.9-264.5,271.1-271.8Quartzveins,highlymineralizedwithsulfides.DESCRIPTION:ACRESAMERICANINCORPORATEDI------J""~CONSULTINGENGINEERSBUFFALOINEWYORKGREPORTNAHVDROELECTRICPRO.JeCTLASKAPOWERAUTHORITVDevilCanyonSouthAbutmentJOBNO.P5701.05Quartzvein,highlymineralizedR52100245.6(100)to247.8HOLENO.BH-4SHEETNO._7_OFJd...(ACRES)052504(RaM)100(98)R55100255.2(82)to260.3R56100260.3(69)to262.6R57100262.6(90)to267.6R58100267.6(84)to271.9R53100247.8(98)to250.3R54250.3to255.2L~FCof'E.REC.RUN(RQD)R51100240.3(96to245.6R50100235.5(58to240.3ANCHORAGE,ALASKA246.3-246.8withsulfides.252.0-267.0Zonecontainsintermixedlayersofspottedphyllite.262.1-262.5,263.9-264.5,271.1-271.8Quartzveins,highlymineralizedwithsulfides.DESCRIPTION:ACRESAMERICANINCORPORATEDI------J""~CONSULTINGENGINEERSBUFFALOINEWYORKGREPORTNAHVDROELECTRICPRO.JeCTLASKAPOWERAUTHORITVDevilCanyonSouthAbutmentJOBNO.P5701.05 307.0-312.2CorelossO.I'.HOLENO.BSHEETNO.8(ACRES)052504IIt&M~TANT.INC.............~_f.T•.."........_""\."".VOAQANCHORAGE,ALASKAShearzone.Rockishighlyclaygouge.Veryfriable.Rockfrom0.01'to0.1'.Coreloss271.9-277.3Coreloss0.3'.282.2-287.5Massivequartzvein.292.9 295.6brecciatedwithfragmentsrange2.0'.DESCRIPTION:308.1-311.5,318.3-319.2Highanglejointswithchloriteandcalcitecoatings.•ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUn[dBUFFALOINEWYORKDRILLINGREPORTSUBITNAHYDROELECTRICPRO....ECTforALASKAPOWERAUTHORITYSITEDevilCanyonSouthAbutmentJOBNO.P5701.05DEPTHROCKTYPE(ft)312.2271.9Phyllite(cont'd)307.0-312.2CorelossO.I'.HOLENO.BSHEETNO.8(ACRES)052504IIt&M~TANT.INC.............~_f.T•.."........_""\."".VOAQANCHORAGE,ALASKAShearzone.Rockishighlyclaygouge.Veryfriable.Rockfrom0.01'to0.1'.Coreloss271.9-277.3Coreloss0.3'.282.2-287.5Massivequartzvein.292.9 295.6brecciatedwithfragmentsrange2.0'.DESCRIPTION:308.1-311.5,318.3-319.2Highanglejointswithchloriteandcalcitecoatings.•ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUn[dBUFFALOINEWYORKDRILLINGREPORTSUBITNAHYDROELECTRICPRO....ECTforALASKAPOWERAUTHORITYSITEDevilCanyonSouthAbutmentJOBNO.P5701.05DEPTHROCKTYPE(ft)312.2271.9Phyllite(cont'd) HOLENO.BH-4SHEETNO.2-0F.£(ACRES)052504(RaM)ANCHORAGE,ALASKA100(100)L~FC~E.REC.RUN(RQO)R68100312.2(81)to317.0R69100317.0(84)to322.0R70100322.0(100)to327.0R71100327.2(100)to332.2R72100332.2(94)to337.3R73100337.3(94)to347.0R74100342.4(89)to347:0R75100347.0(83)to350.0R76350.0to353.3343.9-345.0Quartzvein.352.0-376.3Zonecontainsintermixedlayersofspottedphyllite.330.4-331.1Openjointsat200tocoreaxis.DESCRtPTION:ACRESAMERICANINCORPORATEDI----__r-I....=.:-JCONSULTINGENGINEERS!!.~~T~~.!!.I.!~BUFFALOINEWYORKGREPORTNAHYDROELECTRICPRO..JECTLASKAPOWERAUTHORITY11CanyonSouthAbutmentJOBNO.P5701.05HOLENO.BH-4SHEETNO.2-0F.£(ACRES)052504(RaM)ANCHORAGE,ALASKA100(100)L~FC~E.REC.RUN(RQO)R68100312.2(81)to317.0R69100317.0(84)to322.0R70100322.0(100)to327.0R71100327.2(100)to332.2R72100332.2(94)to337.3R73100337.3(94)to347.0R74100342.4(89)to347:0R75100347.0(83)to350.0R76350.0to353.3343.9-345.0Quartzvein.352.0-376.3Zonecontainsintermixedlayersofspottedphyllite.330.4-331.1Openjointsat200tocoreaxis.DESCRtPTION:ACRESAMERICANINCORPORATEDI----__r-I....=.:-JCONSULTINGENGINEERS!!.~~T~~.!!.I.!~BUFFALOINEWYORKGREPORTNAHYDROELECTRICPRO..JECTLASKAPOWERAUTHORITY11CanyonSouthAbutmentJOBNO.P5701.05 396.0376.3-379.4Coreloss1.4'HOLENO.SHEETNO.(ACRES)ANCHORAGE,A~ASKA"aMccr.-!!.TANTS,INC:.........-~_I.T.....AIlIf.......aU."'.VQlIlg353.3-356.5Coreloss0.2'.362.5-364.8Massivequartzvein.DESCRIPTION:ROCKTYPE387.1-399.0Spottedphyllite.379.4-386.0Mislatchofcorebarrel,sectionbadlybroken,corebadlygroundduringdrilling.376.3-387.0Darkgraytoblack,welldevelopedfoliationat100to200tocoreaxis.Containsnoquartzstringers.370.0-376.3Quartzveinwithsomeintermixedspottedphyllite.386.0-396.0Coreloss0.5'.•ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUn[dBUFFALOINEWYORKDRILLINGREPORTSUSITNAHYDROELECTRICPRO~ECTforALASKAPOWERAUTHORITYSITEDevilCanyonSouthAbutmentJOBNO.P5701.05353.3Phyllite(contId)DEPTH(ft)396.0376.3-379.4Coreloss1.4'HOLENO.SHEETNO.(ACRES)ANCHORAGE,A~ASKA"aMccr.-!!.TANTS,INC:.........-~_I.T.....AIlIf.......aU."'.VQlIlg353.3-356.5Coreloss0.2'.362.5-364.8Massivequartzvein.DESCRIPTION:ROCKTYPE387.1-399.0Spottedphyllite.379.4-386.0Mislatchofcorebarrel,sectionbadlybroken,corebadlygroundduringdrilling.376.3-387.0Darkgraytoblack,welldevelopedfoliationat100to200tocoreaxis.Containsnoquartzstringers.370.0-376.3Quartzveinwithsomeintermixedspottedphyllite.386.0-396.0Coreloss0.5'.•ACRESAMERICANINCORPORATEDAPD[~CONSULTINGENGINEERSUn[dBUFFALOINEWYORKDRILLINGREPORTSUSITNAHYDROELECTRICPRO~ECTforALASKAPOWERAUTHORITYSITEDevilCanyonSouthAbutmentJOBNO.P5701.05353.3Phyllite(contId)DEPTH(ft) HOLENO._B;;;.,;H;;;,.-...;;4__SHEETNO..-l.LOFld-(ACRES)052504(RaM)100(86)9310030.3(81)to35.69410035.6(92)to40.69298425.0(96)to30.3R89100411.1(100)to416.2l~FcoffE.REC.RUN(RQD)R9110020.0(100)to25.0R87100401.1(100)to406.1R90100416.2(100)to420.0R86100396.0(94)to401.1ofR88406.1to411.1406.5-461.7Zonecontainsoccasionallayersspottedphyllite.(425.0-430.3)Coreloss0.1'.DESCRIPTION:ACRESAMERICANINCORPORATED1--------'CONSULTINGENGINEERSBUFFALOtNEWYORKGREPeRTAHVDROELECTRICPRO~ECTLASKAPOWERAUTHORITVilCanyonsouth.AbutmentJOBNO.P5701.05HOLENO._B;;;.,;H;;;,.-...;;4__SHEETNO..-l.LOFld-(ACRES)052504(RaM)100(86)9310030.3(81)to35.69410035.6(92)to40.6R9110020.0(100)to25.0l~FcoffE.REC.RUN(RQD)R86100396.0(94)to401.19298425.0(96)to30.3R90100416.2(100)to420.0R89100411.1(100)to416.2R87100401.1(100)to406.1ofR88406.1to411.1406.5-461.7Zonecontainsoccasionallayersspottedphyllite.(425.0-430.3)Coreloss0.1'.DESCRIPTION:ACRESAMERICANINCORPORATED1--------'CONSULTINGENGINEERSBUFFALOtNEWYORKGREPeRTAHVDROELECTRICPRO~ECTLASKAPOWERAUTHORITVilCanyonSouth.AbutmentJOBNO.P5701.05 mACRESAMERICANINCORPORATEDAPO[~CONSULTINGENGINEERSuoroBUFFALO,NEWYORKDRILLINGREPORTSUSITNAHYDROELECTRICPRO....ECTforALASKAPOWERAUTHORITYSITEDevilCanyonSouthAbutmentJOBNO.P5701.05HOLENO.BSHEETNO.1(ACRES)05250DESeRtPTtON:ROCKTYPE476.0DEPTH(ft)440.6Phyllite(cont'd)mACRESAMERICANINCORPORATEDAPO[~CONSULTINGENGINEERSuoroBUFFALO,NEWYORKDRILLINGREPORTSUSITNAHYDROELECTRICPRO....ECTforALASKAPOWERAUTHORITYSITEDevilCanyonSouthAbutmentJOBNO.P5701.05HOLENO.BSHEETNO.1(ACRES)05250DESeRtPTtON:ROCKTYPE476.0DEPTH(ft)440.6Phyllite(cont'd) R104100476.0(98)to481.0R105100481.0(100)to-486.0R106100486.0(100)to491.0R107100491.0(94)to495.8R108100495.8(96)to501.0EndofHoleLE..1.1OFCOI'(E.REC.RUN(RQO)HOLENO.~BH~-~4~_SHEETNO.~OF~P5701.05(ACRES)052504(RaM)ANCHORAGE,ALASKAOESCRIPTION:GREPORTAHYDROELECTRICPRD..JECTASKAPOWERAUTHORITVilCanonSouthAbutmentJOBNO.ACRESAMERICANINCORPORATEDI------r-I-.=...-.JCONSULTINGENGINEERS!!.~COf~_r-...~·o.·;;·'!.;T~~!\'~~=UFFALOINEWYORKR104100476.0(98)to481.0R105100481.0(100)to-486.0R106100486.0(100)to491.0R107100491.0(94)to495.8R108100495.8(96)to501.0EndofHoleLE..1.1OFCOI'(E.REC.RUN(RQO)HOLENO.~BH~-~4~_SHEETNO.~OF~P5701.05(ACRES)052504(RaM)ANCHORAGE,ALASKAOESCRIPTION:GREPORTAHYDROELECTRICPRD..JECTASKAPOWERAUTHORITVilCanonSouthAbutmentJOBNO.ACRESAMERICANINCORPORATEDI------r-I-.=...-.JCONSULTINGENGINEERS!!.~COf~_r-...~·o.·;;·'!.;T~~!\'~~=UFFALOINEWYORK BEDROCKLOGSCANYONPHYLLITEMETA-ARGILLITEPHYLLITEINTERBEDDEGREYWACKE8ARGIWTECONTORTEDQUARTZVEINSaSTINGERSTOPOFROCK-------..,SLICKSSLICKSSLICKSHIGHLYFRACTUREDANDWEATHEREDQUARTZVEIN~UARTZVEINSaSTRINGERSQUARTZVEINSHIGHLYMINERAUZEDQUARTZVEINHIGHLYMINERALIZEDQUARTZVEINSHEARZONEQUARTZVEINSaSTRINGERSHIGHLY't-+-+-+-+--+-MINERALIZEDINCORPORATEDCORERECOVERYNUMBEROFaR.O.D.JOINTSPER10FT.5101520REMARKSAMERICANACRESBEDROCKLOGSCANYONPHYLLITEMETA-ARGILLITEPHYLLITEINTERBEDDEGREYWACKE8ARGIWTECONTORTEDQUARTZVEINSaSTINGERSTOPOFROCK-------..,SLICKSSLICKSSLICKSHIGHLYFRACTUREDANDWEATHEREDQUARTZVEIN~UARTZVEINSaSTRINGERSQUARTZVEINSHIGHLYMINERAUZEDQUARTZVEINHIGHLYMINERALIZEDQUARTZVEINSHEARZONEQUARTZVEINSaSTRINGERSHIGHLY't-+-+-+-+--+-MINERALIZEDINCORPORATEDCORERECOVERYNUMBEROFaR.O.D.JOINTSPER10FT.5101520REMARKSAMERICANACRES BEDROCKLOGSACRESAMERICANINCORPORATEDNUMBEROFJOINTSPER10FT.5101520REMARKS::::F~::j;::::j:;;;t.-ENDOFROLE501'------->-'~>-'z~0J::~PERMEABILITY...(xlcm/sec_"'lIJa.lIJua.lIJ...J10-510-310-10>-0lIJtr...360380400420440460480N500912.1HOLENO._-=B:...:..H.:...-_4_-DATEJULY1980LOCATION_-=D=E...:..V.:.::IL~...:C:..:..A~N:-:Y-=O.:..;N:.--_BEDROCKLOGSACRESAMERICANINCORPORATEDNUMBEROFJOINTSPER10FT.5101520REMARKS::::F~::j;::::j:;;;t.-ENDOFROLE501'------->-'~>-'z~0J::~PERMEABILITY...(xlcm/sec_"'lIJa.lIJua.lIJ...J10-510-310-10>-0lIJtr...360380400420440460480N500912.1HOLENO._-=B:...:..H.:...-_4_-DATEJULY1980LOCATION_-=D=E...:..V.:.::IL~...:C:..:..A~N:-:Y-=O.:..;N:.--_ OFWATERPRESSURETESTRESULTS135331feet(Vertical)ElevationLevelGaugeDurationFlowCoefficientofStickupPressureofTestRatePermeability(feet)(psi)(min)(gpm)(em/sec)3011010.0452.67x~0-64561510.241.20x10-56012010.251.05x10-57562410.041.43x10-690134103.259.62x10-5110*6125145010.265.36x10-6135155103.657.31x10-5140156104.258.61x10-5155*616567010.0508.26x10-7170150101.032.35x10-5NumberBH-4-----------DevilCanyonIetotestsection-packerproblems-highflowrate-waterflowtopofborehole.OFWATERPRESSURETESTRESULTS135331feet(Vertical)ElevationLevelGaugeDurationFlowCoefficientofStickupPressureofTestRatePermeability(feet)(psi)(min)(gpm)(em/sec)3011010.0452.67x~0-64561510.241.20x10-56012010.251.05x10-57562410.041.43x10-690134103.259.62x10-5110*6125145010.265.36x10-6135155103.657.31x10-5140156104.258.61x10-5155*616567010.0508.26x10-7170150101.032.35x10-5NumberBH-4-----------DevilCanyonIetotestsection-packerproblems-highflowrate-waterflowtopofborehole. DepthTestedGaugeDurationFlowFromToStickupPressureofTestRate(feet)(feet)(feet)(psi)(min)(gpm)163.918018010.64178.919568510.04193.921019510.04208.9225610010.02223.9240110510.03238.9255611510.05253.9270112510.035268.9285613010.035283.9300114010.025298.9315614510.105313.9330115010.035328.9345616012.45343.9360117010.20358.9375617510.11373.9390118510.90388.9405619010.09403.9420120010.14418.9435620010.12433.9450120010.12448.9465620010.10458.9475120010.105BoreholeBH-4DevilCanyon-(Continued)DepthTestedGaugeDurationFlowFromToStickupPressureofTestRate(feet)(feet)(feet)(psi)(min)(gpm)163.918018010.64178.919568510.04193.921019510.04208.9225610010.02223.9240110510.03238.9255611510.05253.9270112510.035268.9285613010.035283.9300114010.025298.9315614510.105313.9330115010.035328.9345616012.45343.9360117010.20358.9375617510.11373.9390118510.90388.9405619010.09403.9420120010.14418.9435620010.12433.9450120010.12448.9465620010.10458.9475120010.105BoreholeBH-4DevilCanyon-(Continued) APPENDIXB-3WATERPRESSURETESTINGDETAILSAPPENDIXB-3WATERPRESSURETESTINGDETAILS ssureTestingDetailsonthemechanicaldetailsofSection5.2b(ii)ofthetheactualproceduresused.atethemaximumwaterpressuretobeappliedinagiventestsection,wingstepswereundertaken.Theverticaldepthtothestaticwatertheholeandtothecenterofthetestsectionwascalculated.Theestpressurewasequalto1psiperfootofverticaldepthfromtherfacetothewatertable,plus0.5psiperfootofverticaldepthwatertabledowntothecenterofthetestsectiontoamaximum200psi.;atingtheactualgaugepressuretobeappliedatthesurface,theicpressuregeneratedbythecolumnofthewaterintheriserpipewatertabletothetopoftheriserwassubtractedfromthecalculatedsure.toobtainaccuratepermeabilityvalues,itwasnecessarythattheressureandflowratesbemeasuredaccurately.ApaneloffourrterglasstubevariableflowmeterswassetupasshowninFigureA.I.ershaveanaccuracyof1%overfullscaleandindividualrangesof67gpm,0.095-1.19gpm,0.34-4.25gpmand0.88-11.0gpm.Thepanelptouseanyofthefourmetersortobypassthemaltogether.ssurewassuppliedbyaBeanfixed-displacement,pistonpump.Testwasmonitoredusingaliquid-filledAshcroftmodel1279pressureh a 0to300psirangeand2psidivisions.Theaccuracyofthis0.5%offullscale.pressuresurgingintheline,asurgetankwasinstalledandsnubberswereusedbetweenthepressuregaugeandthemainline.ssureTestingDetailsonthemechanicaldetailsofSection5.2b(ii)ofthetheactualproceduresused.atethemaximumwaterpressuretobeappliedinagiventestsection,wingstepswereundertaken.Theverticaldepthtothestaticwatertheholeandtothecenterofthetestsectionwascalculated.Theestpressurewasequalto1psiperfootofverticaldepthfromtherfacetothewatertable,plus0.5psiperfootofverticaldepthwatertabledowntothecenterofthetestsectiontoamaximum200psi.;atingtheactualgaugepressuretobeappliedatthesurface,theicpressuregeneratedbythecolumnofthewaterintheriserpipewatertabletothetopoftheriserwassubtractedfromthecalculatedsure.toobtainaccuratepermeabilityvalues,itwasnecessarythattheressureandflowratesbemeasuredaccurately.ApaneloffourrterglasstubevariableflowmeterswassetupasshowninFigureA.I.ershaveanaccuracyof1%overfullscaleandindividualrangesof67gpm,0.095-1.19gpm,0.34-4.25gpmand0.88-11.0gpm.Thepanelptouseanyofthefourmetersortobypassthemaltogether.ssurewassuppliedbyaBeanfixed-displacement,pistonpump.Testwasmonitoredusingaliquid-filledAshcroftmodel1279pressureh a 0to300psirangeand2psidivisions.Theaccuracyofthis0.5%offullscale.pressuresurgingintheline,asurgetankwasinstalledandsnubberswereusedbetweenthepressuregaugeandthemainline. FLOW MET ER PANEL WATER SOURCE FILTERFLOW-CONTROL VALVES FLEXIBLE HOSE PRESSURE GAUGE 0-3QOpsi AW DRILL RODS INFLATION LINE INFLATABLE PACKERS SCHEMATIC VIEW OF WATER PRESSURE TEST ASSEMBLY FIGURES.I. WATER SOURCE FLEXIBLE HOSE BY-PASS VALVE FILTERFLOW-CONTROL VALVES FLEXIBLE HOSE FLOW MET ER PANEL PRESSURE GAUGE O-:300psi AW DRILL RODS INFLATiON LINE 1 TEST SECTIONJ _ INFLATABLE PACKERS SCHEMATIC VIEW OF WATER PRESSURE TEST ASSE~BLY FIGUREB.I. APPENDIXC-1AUGERDRILLINGREPORTSAPPENDIXC-1AUGERDRILLINGREPORTS WATANAWATANA 11.2~;.8M_F'4TOGRID.F.B.PROJ.NO·052504DWG.NO.11.3%,SM,F4PossiblyFrozenBelow21'GrayBoulderat29',Refusalc.::::.;o.a29'T.D.AH-D27-15-80t=".,.......,.....------------O'1ORGANICMATERIALGGRAVELLYSiNDW/SOMESi~TrnGray~16,25.7%,SM,F2ScatteredCobbles0.5'-?9'(3)20,1l.4%:sM,F4----3SlSUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVESTIGATIONS6.7%,SM,F2LittleVisibleIce,6'-20SILTYSANDW/TRACETOSONEGRAVELGray-Brown,SubangulartoSubroundedRefusal,6.6%,SM,F4ORGANICMATERIALlv/TRACESILT31VisibleIce,0-4.5',VrRefusalBoulders3.5'-6'--------------4.5'NoVisibleIce,4.5'-6'TRACEORGANICt1ATERIAL,4.5'-6'RAfusal,11.1%,SM,F4CONSULTANTS,INC.ENGINEERSGEOLOGISTSp\.ANNeAlSSURVEYORS"=.;::,,..;~-----------0 'Boulderat20',Refusal.;.ll:.li:.;.;L.-------------20'T.D.WATERTABLENOTENCOUNTERED11.2~;.8M_F'4TOGRID.F.B.PROJ.NO·052504DWG.NO.11.3%,SM,F4PossiblyFrozenBelow21'GrayBoulderat29',Refusalc.::::.;o.a29'T.D.AH-D27-15-80t=".,.......,.....------------O'1ORGANICMATERIALGGRAVELLYSiNDW/SOMESi~TrnGray~16,25.7%,SM,F2ScatteredCobbles0.5'-?9'(3)20,1l.4%:sM,F4----3SlSUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVESTIGATIONS6.7%,SM,F2LittleVisibleIce,6'-20SILTYSANDW/TRACETOSONEGRAVELGray-Brown,SubangulartoSubroundedRefusal,6.6%,SM,F4ORGANICMATERIALlv/TRACESILT31VisibleIce,0-4.5',VrRefusalBoulders3.5'-6'--------------4.5'NoVisibleIce,4.5'-6'TRACEORGANICt1ATERIAL,4.5'-6'RAfusal,11.1%,SM,F4CONSULTANTS,INC.ENGINEERSGEOLOGISTSp\.ANNeAlSSURVEYORS"=.;::,,..;~-----------0 'Boulderat20',Refusal.;.ll:.li:.;.;L.-------------20'T.D.WATERTABLENOTENCOUNTERED ORGANIC~1ATERIALBoulderatIS',RefusaSANDYSILTYGRAVELGrayScatteredG)Refusal2Refusal,DIORITEBOULDER0'10------SUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVESTIGATIONS1.5'56RefusalVisibleIceaslayersandCoatings,2'-20,Vc+VsVisibleIceLenses,23'-27',VsRefusal87NoVisibleIce,20'-23',NSANDYSILTYGRAVELBrownScatteredCobbles,11.5'-30.5'Boulderat10.5'92R&MCONSULTANTS,INC.ENGINEERSGECl,.Ca'STSPLANNeRSSURVEYORS.~~~~------------0'NoVisibleIce,27'-30.5',NRefusal~;;;.,;j"~",,,,-30.5'T.D.SSSORGANICMATERIALSp~<._0SAND-;SIL-;w/so~GRA~~~'SsS.OWN.KWCKO.MHDATE.Aug.80SCALE.1'=4'ORGANIC~1ATERIALBoulderatIS',RefusaSANDYSILTYGRAVELGrayScatteredG)Refusal2Refusal,DIORITEBOULDER0'10------SUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVESTIGATIONS1.5'56RefusalVisibleIceaslayersandCoatings,2'-20,Vc+VsVisibleIceLenses,23'-27',VsRefusal87NoVisibleIce,20'-23',NSANDYSILTYGRAVELBrownScatteredCobbles,11.5'-30.5'Boulderat10.5'92R&MCONSULTANTS,INC.ENGINEERSGECl,.Ca'STSPLANNeRSSURVEYORS.~~~~------------0'NoVisibleIce,27'-30.5',NRefusal~;;;.,;j"~",,,,-30.5'T.D.SSSORGANICMATERIALSp~<._0SAND-;SIL-;w/so~GRA~~~'SsS.OWN.KWCKO.MHDATE.Aug.80SCALE.1'=4' C!)46SUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVESTIGATIONS0'1.5'F.B.GRID.PROJ.NO-O52504DWG.NO.RefusalSANDYGRAVELW/TRACESILTNumerousCobblesRefusalBoulderat10',Refusal0'T.D.20SILTYSANDGRADINGTOTOSANDW/SOMESILTtr\Brown'C.J15__________4.5'(!)ORGANICMATERIAL---------®51AH-E27-18-805pSl51SlSlRefusal25IT.D.28RefusalBoulder,7.5'-10'SANDYGR~VELW/SOMESILTBrown~catteredCobbles,4'-25'100+RefusalRefusalBoulder,20.5'-22'RefusalCONSULTANTS,INC.ENGINEERSGEOLOGISTSPLANNERSSURVeYORS>~""""T"'?-----------0'C!)46SUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVESTIGATIONS0'1.5'F.B.GRID.PROJ.NO-O52504DWG.NO.RefusalSANDYGRAVELW/TRACESILTNumerousCobblesRefusalBoulderat10',Refusal0'T.D.20SILTYSANDGRADINGTOTOSANDW/SOMESILTtr\Brown'C.J15__________4.5'(!)ORGANICMATERIAL---------®51AH-E27-18-805pSl51SlSlRefusal25IT.D.28RefusalBoulder,7.5'-10'SANDYGR~VELW/SOMESILTBrown~catteredCobbles,4'-25'100+RefusalRefusalBoulder,20.5'-22'RefusalCONSULTANTS,INC.ENGINEERSGEOLOGISTSPLANNERSSURVeYORS>~""""T"'?-----------0' Refusal100+SANDYGRAVELW/TRACEBrown,SubangulartoRefusalORGANICMATERIAL-------------\2JSILTVl/Sm1ESANDBrm'm3~2-L1--------SANDW/SOMESILTt6'Orange-Brown~·~;;;"Hi=-------~,~~~5J22SANDYSILT~::::~------26,17.6%,5MbF2ScatteredCobles,4.SlSUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVESTIGATIONSSANDYGRAVELW/TRACETOSOHESILTBrown,SubangulartoSubrounded9420'T.D.100+100+,0.7%,GW,NFSScatteredCobbles,1.5'-20'RefusalC)~'IR&MCONSULTANTS.INC.ENGINeeRSGEOLOGISTSPLANNeRSSURVEVOF1iS,..,..,..,..,.....-::=------------0'ORGANIC~~TERIAL-.5'GRAVELWj'SOr..fE-SANDANDTRACESILT~----__l'450-.SILTYSANDC2u10"O+-----l.5'@60,4.4%,SP/SM,F20DWN.KWCKD.MEDATE.Aug.80SCALE.1'=4'Refusal100+SANDYGRAVELW/TRACEBrown,SubangulartoRefusalORGANICMATERIAL-------------\2JSILTVl/Sm1ESANDBrm'm3~2-L1--------SANDW/SOMESILTt6'Orange-Brown~·~;;;"Hi=-------~,~~~5J22SANDYSILT~::::~------26,17.6%,5MbF2ScatteredCobles,4.SlSUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVESTIGATIONSSANDYGRAVELW/TRACETOSOHESILTBrown,SubangulartoSubrounded9420'T.D.100+100+,0.7%,GW,NFSScatteredCobbles,1.5'-20'RefusalC)~'IR&MCONSULTANTS.INC.ENGINeeRSGEOLOGISTSPLANNeRSSURVEVOF1iS,..,..,..,..,.....-::=------------0'ORGANIC~~TERIAL-.5'GRAVELWj'SOr..fE-SANDANDTRACESILT~----__l'450-.SILTYSANDC2u10"O+-----l.5'@60,4.4%,SP/SM,F20DWN.KWCKD.MEDATE.Aug.80SCALE.1'=4' SUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVESTIGATIONSGRID.fa-PROJ,NO,052504DWG,NO,ORGANICl1ATERIAL---------.5'Refusal32INTERLAYEREDSANDYSILTANDSILTYSANDBrownRefusalSANDYGRAVELW/SOMESILTBrown,SubangulartoSubroundedScatteredCobbles,9'-26.5'8180\;ll:,;'-U26.5'T.D.AH-E67c-:,::1;.9;.-".;8~0::.-0'123~flDW/TRACESILT-----------2.5~..,~;")4"RefusalSANDYGRAVELW/TRACESILTBrownScatteredCobbles,2.5-6'RefusalSlSpSpSlSlSlSlSlSlCONSULTANTS,INC.ENGINEERSGEOL.OGISTSPl.ANNERBSURVEYORS-ES:"23-80w.:.:;J..------------iO'T.D.WATERTABLENOTENCOUNTERED1 4ORGANICMATERIAL::-~:I-I~----------l'2,8SILTW/TRACESAND338ANDORGN1IC~mTERIAL~Red-Tan2'4Refusal- - - -5100+100+GRAVELW/TRACETOSOMESILT,SOMESANDBrown,SubroundedtoSubanq1.l1arRefusalRefusalScatteredCobblesandBoulders,2'-10'RefusalSUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVESTIGATIONSGRID.fa-PROJ,NO,052504DWG,NO,ORGANICl1ATERIAL---------.5'Refusal32INTERLAYEREDSANDYSILTANDSILTYSANDBrownRefusalSANDYGRAVELW/SOMESILTBrown,SubangulartoSubroundedScatteredCobbles,9'-26.5'8180\;ll:,;'-U26.5'T.D.AH-E67c-:,::1;.9;.-".;8~0::.-0'123~flDW/TRACESILT-----------2.5~..,~;")4"RefusalSANDYGRAVELW/TRACESILTBrownScatteredCobbles,2.5-6'RefusalSlSpSpSlSlSlSlSlSlCONSULTANTS,INC.ENGINEERSGEOL.OGISTSPl.ANNERBSURVEYORS-ES:"23-80w.:.:;J..------------iO'T.D.WATERTABLENOTENCOUNTERED1 4ORGANICMATERIAL::-~:I-I~----------l'2,8SILTW/TRACESAND338ANDORGN1IC~mTERIAL~Red-Tan2'4Refusal- - - -5100+100+GRAVELW/TRACETOSOMESILT,SOMESANDBrown,SubroundedtoSubanq1.l1arRefusalRefusalScatteredCobblesandBoulders,2'-10'Refusal F.B.ORGANIC~ffiTERIAL100+SANDYGRAVELI<J/TRACESILTYellow-BrownRefusalScatteredCobbles,3'-6Boulderat6i,Refusa16WATERTABLENOTENCOUNTERE37SANDw/SOMESILT(;RADING':LOSAND_W/T~CEGRAVEL__AH-E87-21-80SpSpSlSlSUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVESTIGATIONSRefusalRefusalBoulderat5.5',RefusalScatteredtoNumerousCobbles,0-5.5'2.3%,GJ?.,(NFSSANDYGliliVELW/TRACESILTYellow-BrownR&MCONSUL.TANTS.INC.I!NG'NEERSGEOLOGISTSPLANNERSSURVEVORSAH-E7·",,/-,.,,2;.0:,..-_8:..0:.....01SpSlSlRefusalSlJ:o.:J.::..u~...5.5'T.D.WATERTABLENOTENCOUNTEREDSlCKD.MHOWN.KWDATE.Au.80SCALE.l'=21F.B.ORGANIC~ffiTERIAL100+SANDYGRAVELI<J/TRACESILTYellow-BrownRefusalScatteredCobbles,3'-6Boulderat6i,Refusa16WATERTABLENOTENCOUNTERE37SANDw/SOMESILT(;RADING':LOSAND_W/T~CEGRAVEL__AH-E87-21-80SpSpSlSlSUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVESTIGATIONSRefusalRefusalBoulderat5.5',RefusalScatteredtoNumerousCobbles,0-5.5'2.3%,GJ?.,(NFSSANDYGliliVELW/TRACESILTYellow-BrownR&MCONSUL.TANTS.INC.I!NG'NEERSGEOLOGISTSPLANNERSSURVEVORSAH-E7·",,/-,.,,2;.0:,..-_8:..0:.....01SpSlSlRefusalSlJ:o.:J.::..u~...5.5'T.D.WATERTABLENOTENCOUNTEREDSlCKD.MHOWN.KWDATE.Au.80SCALE.l'=21 R&MCONSULTANTS.INC.ENGINEERSGEOl.OGISTSP\.ANN&ASSURVEYQRSGRID.F.B.PROJ.NO.()c:')S04DWG.NQF2SUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVERSTIGATIONSSANDW/SOMESILTANDTRACEORGANICMATERIALYellow-BrownNoRecovery100ScatteredCobbles,2.5'-8'56SANDYGRAVELW/SOMESILT4.4%rGM,FlBoulderat8',Refusal----------2.5'WATERTABLENOTENCOUNTERED~fl~,...-9;:~4':"":&2.il.L------------8'T.D.AH-E97-20-80..:...,;;;.~.:::.:;:------------0IA51SpSl51SlR&MCONSULTANTS.INC.ENGINEERSGEOl.OGISTSP\.ANN&ASSURVEYQRSGRID.F.B.PROJ.NO.()c:')S04DWG.NQF2SUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVERSTIGATIONSSANDW/SOMESILTANDTRACEORGANICMATERIALYellow-BrownNoRecovery100ScatteredCobbles,2.5'-8'56SANDYGRAVELW/SOMESILT4.4%rGM,FlBoulderat8',Refusal----------2.5'WATERTABLENOTENCOUNTERED~fl~,...-9;:~4':"":&2.il.L------------8'T.D.AH-E97-20-80..:...,;;;.~.:::.:;:------------0IA51SpSl51Sl DEVILCANYONDEVILCANYON WATERTABLENOTENCOUNTEREDF.B.GRID.PROJ.NO.052504DWG.NO..5'0'SUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALP1VESTIGATIONSSILTGRAVELW/TRACESILTScatteredCobbles,11'-23'£---·------4'30Boulderat23',Refusal~~23'T.D.AH-Gl7-22-80SpSpSlSlSlSlSlSlSlSlSlCONSULTANTS.INC.ENG'NEERSGEOLOGISTSP\"ANNERSSURVEYORSWATERTABLENOTENCOUNTEREDF.B.GRID.PROJ.NO.052504DWG.NO..5'0'SUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALP1VESTIGATIONSSILTGRAVELW/TRACESILTScatteredCobbles,11'-23'£---·------4'30Boulderat23',Refusal~~23'T.D.AH-Gl7-22-80SpSpSlSlSlSlSlSlSlSlSlCONSULTANTS.INC.ENG'NEERSGEOLOGISTSP\"ANNERSSURVEYORS SUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVESTIGATIONS:-"::;':;~~------------o'Sl53SILTYSANDANDSANDW/TRACESILTSP1ORGANICHATERIAL----------------0.5'SPSeasonalFrost.5-1.5'Sl89SANDYGRAVELW/TRACESILTBrowntoGray,SubangulartoSubroundedSl54Sl7RefusalSlRefusalScatteredCobbles,6'-11'SlRefusalBoulderatII',RefusalC:O.~I-II'T.D.WATERTABLENOTENCOUNTEREDR&MCONSULTANTS.INC.ENG.NEERSaEOLOOISTSPLANNaASSURVEYORSOWN.KWCKD.MHDATE·Aua.80SCALE.l'=2'SUSITNARIVERHYDROELECTRICPROJECTGEOTECHNICALINVESTIGATIONS:-"::;':;~~------------o'Sl53SILTYSANDANDSANDW/TRACESILTSP1ORGANICHATERIAL----------------0.5'SPSeasonalFrost.5-1.5'Sl89SANDYGRAVELW/TRACESILTBrowntoGray,SubangulartoSubroundedSl54Sl7RefusalSlRefusalScatteredCobbles,6'-11'SlRefusalBoulderatII',RefusalC:O.~I-II'T.D.WATERTABLENOTENCOUNTEREDR&MCONSULTANTS.INC.ENG.NEERSaEOLOOISTSPLANNaASSURVEYORSOWN.KWCKD.MHDATE·Aua.80SCALE.l'=2' APPENDIXC-2LABORATORYTESTDATAAPPENDIXC-2LABORATORYTESTDATA GliGPSMSMSP/SMSMSMSMSMSMM-nUiedClass.SMUnifiedClass.2.2Slot4.2NPPINPNPPI13.9NPNVLLLLNV4.42.34.46.6UV·-NP0.76.66.79.417.515.7~~.317.12.517.627.319.6DATE~10:::.-,;;.:1:..:7..:-.:::8:::.0_PARTYNO.PAGENO...£::QL\DOSo:nMoist.3~1.611.2\DOSD02Moist,NOTE:SIEVEANALYSIS'PERCENTPASSIN«3317.0NOTE:SIEVEANALYSIS'PERCENTPASSIN'5428.314.46.13.35826.99.23.01.39928.6122.1163.7286.26622.29859.54728.512.03.22.925./NV7044.022.58.94.011.315.55436.019.68.95.25338.224.313£8.610.921.79.2c:-6138.621.310.34.26942.319.06.12.611.16235.718.28.24.96235.021.24.12.411.49948.05930.713.810099.581.369.€.0.842.155.931.2Li4011200.023131529276797876668761698464tlO140#200.0210010010010099 981009997 930095877957440091 918710098969218780009995 94901009076 6257401008573564939R$M.-._...;;.C..,;O;.,;N...;;,S..,;U;,.I.;;.;.T_A;.,;N,;"T,;...;;S.:.,_I__N__C.:..__100969493 918510094929089861008787838075SUMMARYOFLABORATORYTESTDATASUMMARYOFLABORATORYTESTDATA10095 9389 87868010097 928984 817310095a8848178 71NP=NonPlastic:3"2"1"·008080 80777372674"3"2"1.,"I"3/4"1/2'3/'t4t1010092 908269-r5::.8-t__4:..:5~..::3::::8"""f-'2:.7:-:f-_.::2..::3-t--,1:.:4~-=2:.:.•..::6+__-I-_+-_1-__-j+__-4......:G:.:P__4"DEPTHDEPTH052504(WatanaDamSitel,A=essusitna•EstimatedValue(GrabsameielAH-E9il2(loS- 30')Aff-E9#6(6.5-aD'){GrabsameleAH-E7#3••1-2"RockPresentinSample101-80-256101-80-257!2.0-3.0')(5.0-6.5')(3.0-4.5')•EstimatedValue(6.5-8.0')**NV2NonViscousr-;-----''--..;...;.__f--1,.;;1.;;.0.;;.0..;-8;.;;9-+_8.;;.9'-183 80767262GliGPSMSMSP/SMSMSMSMSMSMM-nUiedClass.SMUnifiedClass.2.2Slot4.2NPPINPNPPI13.9NPNVLLLLNV4.42.34.46.6UV·-NP0.76.66.79.417.515.7~~.317.12.517.627.319.6DATE~10:::.-,;;.:1:..:7..:-.:::8:::.0_PARTYNO.PAGENO...£::QL\DOSo:nMoist.3~1.611.2\DOSD02Moist,NOTE:SIEVEANALYSIS'PERCENTPASSIN«3317.0NOTE:SIEVEANALYSIS'PERCENTPASSIN'5428.314.46.13.35826.99.23.01.39928.6122.1163.7286.26622.29859.54728.512.03.22.925./NV7044.022.58.94.011.315.55436.019.68.95.25338.224.313£8.610.921.79.2c:-6138.621.310.34.26942.319.06.12.611.16235.718.28.24.96235.021.24.12.411.49948.05930.713.810099.581.369.€.0.842.155.931.2Li4011200.023131529276797876668761698464tlO140#200.0210010010010099 981009997930095877957440091 91871009896921878000999594901009076 6257401008573564939R$M.-._...;;.C..,;O;.,;N...;;,S..,;U;,.I.;;.;.T_A;.,;N,;"T,;...;;S.:.,_I__N__C.:..__100969493 918510094929089861008787838075SUMMARYOFLABORATORYTESTDATASUMMARYOFLABORATORYTESTDATA10095 9389 87868010097 928984817310095a8848178 71NP=NonPlastic:3"2"1"·008080 80777372674"3"2"1.,"I"3/4"1/2'3/'t4t1010092 908269-r5::.8-t__4:..:5~..::3::::8"""f-'2:.7:-:f-_.::2..::3-t--,1:.:4~-=2:.:.•..::6+__-I-_+-_1-__-j+__-4......:G:.:P__4"DEPTHDEPTH052504(WatanaDamSitel,A=esSusitna•EstimatedValue(GrabsameielAH-E9il2(loS-30')Aff-E9#6(6.5-aD'){GrabsameleAH-E7#3••1-2"RockPresentinSample101-80-256101-80-257!2.0-3.0')(5.0-6.5')(3.0-4.5')•EstimatedValue(6.5-8.0')**NV2NonViscousr-i----''--..;...;.__f--1,.;;1.;;.0.;;.0..;-8;.;;9-+_8.;;.9'-183 80767262 80 70.....c 0> iii ~60 >. .Q ~ Ql 50<: lJ...... <: Ql 400 ~ Qla.. 30 20 10 0 100 50 10 5 GRAVEL Coarse I Fine 0.5 0.1 Grain Size in Millimeters SAND Medium I Fine 0.05 0.01 0.005 SILT or CLAY 20 30 .... .c 0> iii ~ 40 >. .Q... Ql Ul 50 ... 0 0u .... 60 <: Ql 0.... Qla.. 70 80 90 100 0.001 SAMPLE NO. W-80-256 W-80-257 MOISTURE I DRY CONTENT DENSITY LL PI CLASSIFICATION a DESCRIPTION R ¢M CONSULTANTS,INC. BORROW AREA H SUMMARY OF GRAIN SIZE DISTRIBUTION DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 80 70.....c 0> iii ~60 >. .Q ~ Ql 50<: lJ...... <: Ql 400 ~ Qla.. 30 20 10 0 100 50 10 5 GRAVEL Coarse Fine 0.5 0.1 Grain Size in Millimeters SAND Medium Fine 0.05 0.01 0.005 SILT or CLAY 20 30 .....c 0> Ql ~ 40 >. .Q... Ql Ul 50 ... 0 0u.... 60 <: Ql 0.... Qla.. 70 80 90 100 0.001 SAMPLE NO, W-80-256 W-80-257 MOISTURE DRY CONTENT DENSITY LL PI CLASSIFICATION a DESCRIPTION R ¢M'--__C_O_N_S_U_L_T_A_N_T_S_,_'_N_C_,__ BORROW AREA H SUMMARY OF GRAIN SIZE DISTRIBUTION DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 o o '""-l '" U.S.Stonpord Sieve OpeninQs in Inch ..U.S.Standard Sieve Number.Hydrom.t.r 3 ,11/2 I 3/4 1/2 3/8 3 4 6 8 10 14 16 20 30 40 50 60 70 100 140 200 270 0100"-I I I I I I I I I I I I 90 1""-10"- 80 "-20 'Ia.30 .... 70 .t:-r--.....Ql .t:.........'iiiOl:::iii ~:::60 40 >-.Q >-.....Q ......CIJ....i"-.It> 4l 50 50 ....c '-......0 lL.0.......t)-...................C 4l 60 c 0 40 4l....r--0 4l .... a.4l I-.....a. 30 70 r'-..... 20 ~80 r-- .............-10 -.90 0 100 100 50 10 5 I 0.5 01 0.05 0.01 0.005 0.001 Groin Size in Millimeters I GRAVEL I SAND I SILT or CLAYICoarseIFineICoarse,Medium Fine , SAMPLE NO.MOISTURE ORY LL PI CLASSIFICATION a DESCRIPTIONCONTENTDENSITY W-80-256 10.9%21.7 9.2 GC-SC Poorly graded 'Till'with low Plasticity ~--- ((;r;:,h !";;:,mnl \SILTY GRAVEL AND SAND WITH TRACE CLAY i!ii:'!kilN ifiif)i@ !dd!0hN0 o o '""-l '" U.S.Stonpord Sieve OpeninQs in Inch ..U.S.Standard Sieve Number.Hydrom.t.r 3 11/2 I 3/4 1/2 3/8 3 4 6 8 10 14 16 20 30 40 506070 100 140 200 270 0100 "" I I I I I I I I I I I II "1090"- 80 "--...20 ........30 .... 70 .t:-...........Ql .t:.........'iiiOli'-..:::iii:::60 40 >-.Q >-.....Q "t CIJ....i'-..It> 4l ....c 50 "'"50 0 lL.0 "'-t)-~....C 4l 40 60 c 0 4l....r...0 4l .... a.4l '-.,a. 30 70 '"20 i'-.........80 1-.................10 ........90 0 100 100 50 10 5 I 0.5 01 0.05 0.01 0.005 0.001 Groin Size in Millimeters I GRAVEL I SAND I SILT or CLAYICoarseIFineICoarseIMediumFineI SAMPLE NO.MOISTURE ORY LL PI CLASSIFICATION a DESCRIPTIONCONTENTDENSITY W-80-256 10.9%21.7 9.2 GC-SC Poorly graded 'Till'with low Plasticityi-'-"-"-- (C:;r;:,h ~;:,mnl '\SILTY GRAVEL AND SAND WITH TRACE CLAY -.1'14'_ 80 70 +-.c 0>.4; ::=60 >. .Q... Ql 50<: lL. +-<: Ql 400... Ql Q. 30 20 10 0 100 50 10 5 GRAVEL Coarse I Fine 0.5 0.1 Groin Size in Millimeters SAND Medium I Fine 0.05 0.01 0.005 SILT or CLAY 20 +-30 .c 0> .4; ::= 40 >. .Q... Ql.. 50 ... 0 0 0 +- 60 <: Ql 0... Ql Q. 70 80 90 100 0.001 I MOISTURE I DRY I I I .SAMPLE NO.CONTENT DENSITY LL PI CLASSIFICATION a DESCRIPTION W-80-f~1 12.3 I 117 .1 I 2.5 I GM-SMI Poorly graded 'Till'with Non-Plastic Fines I SILTY GRAVEL AND SAND WITH TRACE CLAY R ¢M CONSULTANTS,INC. BORROW AREA H DRAWN BY APPROVED BY DATE DEC. PROJECT NO. DL 1980 052504 80 70 +-.c 0>.4; ::=60 >. .Q... Ql 50<: lL. +-<: Ql 400... Ql Q. 30 20 10 0 100 50 10 5 GRAVEL Coarse Fine 0.5 0.1 Groin Size in Millimeters SAND Medium Fine 0.05 0.01 0.005 SILT or CLAY 20 30 +-.c 0> .4; ::= 40 >. .Q... Ql.. 50 ... 0 0 0 +- 60 <: Ql 0... Ql Q. 70 80 90 100 0.001 SAMPLE NO.~g~~TEu~f OE~~YTY LL PI CLASSIFICATION a DESCRIPTION W-80-f.=.5-'-7_-+--=1:.:2:..:.:..:3=__-t-.r=1:..:7~._=1=___+_...:2~•.::.5_+-=G:::.M=--_=S:..:M.:.;----'p=-O.::.o.::.r=1..L..J..::.r:..::a:.:d:.:e:.:d=--...:'T::.:l=.·1=1_'~w.;:i_=t:.:.h:......;:N:.:o:.:n.:..--.:p:..:1=.a=s.;:t.=i.::c-=.F.::i:.:.n:.:e:.:s=---I SILTY GRAVEL AND SAND WITH TRACE CLAY R ¢M C_O_N_S_U_L_T_A_N_T_S...;.,_I_N_C_,__ BORROW AREA H DRAWN BY APPROVED BY DATE DEC. PROJECT NO. DL 1980 052504 ,) o N -.j N U.S.Stan,dard Sieve Openings in Inches U.S.Standard Sieve Numben Hydrameltr 100 90 80 70:c 01c;; ~60 >..0 '-Q)50c:. lL ..-c:. Q)40(,) '- Q) Q. 30 20 10 3 2 11/2 I 3/4 1/2 3/8 3 4 6 8 10 14 16 20 30 4\506070 100 140 200 270 I [I I I I I I 1 "- "-'"'"~ t-- ~ I'\. I\. '\ .. .. 0 10 20 30 ..-.c:. 0> c;; ~ 40 >. .0 '- <IIen 50 '-aa 0....c:.60 Q) (,) '- Q) Q. 70 80 90 0 100 50 10 GRAVEL Coorse I Fine 5 ~5 ~I Groin Size in Millimeters SAND Medium I Fine 0.05 0.01 0.005 SILT or CLAY 100 0.001 I MOISTURE I DRY I I ISAMPLENO,CONTENT DENSITY LL PI CLASSIFICATION 8 DESCRIPTION W-80~28~1 155.9 I 33.2 lCL-CH I SILT AND CLAY Medium to High Plasticity I ,) o N -.j N U.S.Stan,dard Sieve Openings in Inches U.S.Standard Sieve Numben Hydrameltr 100 90 80 70:c 01c;; ~60 >. .0 '-Q) 50c:. lL ..-c:. Q)40(,) '- Q) Q. 30 20 10 3 2 I III I 3/4 1/2 3/8 3 4 6 8 10 14 16 20 30 4\506070 100 140 200 270 I I II I I I I I "- "- '"""~ -- r'\ 1"'- ~ \ .. .. 0 10 20 30 ..- .c:. 0> c;; ~ 40 >. .0 '- <IIen 50 '-aa 0 ..... 60 c:. Q) (,) '- Q) Q. 70 80 90 50 10 GRAVEL Coorse Fine 5 ~5 ~I Groin Size in Millimeters SAND Medium Fine 0.05 0.01 0.005 SILT or CLAY 100 0.001 MOISTURE DRYSAMPLENO,CONTENT DENSITY LL PI CLASSIFICATION 8 DESCRIPTION W-80-28=.2_-t-....4""2:..:.•..:::1:..:;%,_+.+-=S::..:S::..:.:....:9::....--f-....:3::..:3::...::..:2=--.FC:::.;L=.-_C:::.;H:.:-+-=-S.=I=L.::..T-=..::A=.:N.::::D---=:C.::::L::A,:.::Y ..:.M:..:e:.,:d:..:i:..:u=ffi:::-.;t:.,:O:.......::H.=.::i::....<..:h:.::....::P....:l::.:a:.:..s.:.,t.:.,l.::.'c.:.,l..;,;.·t..:-y"----I 60 ~... Ql 50c: LL.....c: Ql 400... Qla.. 30 20 10 0 100 50 10 5 GRAVEL Coarse I Fine 0,5 0,1 Grain Size in Millimeters SAND Medium I Fine 0,05 0,01 0,005 SILT or CLAY 40 '".0... <l>en 50 ... 0 0u.... 60 c: Q) 0... Q)a.. 70 80 90 100 0,001 SAMPLE NO,MOISTuRE I DRY CONTENT DENSITY LL PI CLASSIFiCATION a DESCRIPTION -80-300 I 6.6% (Grab SamplED NV NP SM Sandy 'Till'with non plastic fines GRAVELLY SILTY SAND WITH TRACE CLAY Well graded R ¢M CONSULTANTS.INC. DEADMAN BORROW AREA DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO,052504 60 ~... Ql 50c: LL.....c: Ql 400... Ql Q. 30 20 10 0 100 50 10 5 GRAVEL Coarse Fine 0,5 0,1 Grain Size in Millimeters SAND Medium Fine 0,05 0,01 0,005 SILT or CLAY 40 '".0... Qlen 50 ... 0 0u.... 60 c: Ql 0... Ql Q. 70 80 90 100 0,001 SAMPLE NO,MOISTURE DRY CONTENT DENSITY LL PI CLASSIFICATION a DESCRIPTION -80-300 6.6% (Grab Sampl ) NV NP SM Sand 'Till'with non plastic fines GRAVELLY SILTY SAND WITH TRACE CLAY Well graded R ¢M C_O_N_S_U_L_T_A_N_T_S_,_1_N_C_o__ DEADMAN BORROW AREA DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO,052504 ro o N --l N U.S.Stan.dard Sieve Openings in Inches U.S.Standard Sieve Numbers Hydramlter 100 90 80 70.-.c C> Qi 3:60 » ..Cl... 4l 50c LL .-c 4l 400... 4l Q. 30 20 10 3 2 11/2 I 3/4 1/23/8 3 4 6 8 10 14 16 20 30 40 506070 100 140 200 270 I I I I I I I II I I I I \ ill \ 1\ \ \ \ \ '\ '\ l\- ll---.........i-- ..............r- r---...... 0 10 20 30 .-.c QI 'Qi 3: 40 » ..Cl... CI.I til 50 ... 0 0u 60 C 4l 0... Ol Q. 70 80 90 0 100 50 10 GRAVEL Coarse I Fine 5 0.5 0.1 Groin Size in Millimeters SAND Medium I Fine 0.05 0.01 0.005 SILT or CLAY 100 0.001 SAMPLE NO. W-80-302 (Grab Sampl MOISTURE I DRY CONTENT DENSITY LL PI GP CLASSIFICATION a DESCRIPTION SANDY:GRAVEL W.(~RACE S:J:LT I Poorly Graded ro o N --l N 3 2 11/2 I 3/4 1/23/8 3 4 6 8 10 14 16 20 30 40 506070 100 140 200 270 I II I I I I I I I I I I It- i\ It \ 1\ \ \ i\ \ '\ 1\ f\ ----.-..,'-... ~-......... ............... I- 100 90 80 70.-.c C> Qi 3:60 » ..Cl... 4l 50c LL .-c 4l 400... 4l Q. 30 20 10 U.S.Stanllard Sieve Openings in Inches 50 10 GRAVEL Coarse Fine U.S.Standard Sieve Numbers 0.5 0.1 Groin Size in Millimeters SAND Medium Fine 0.05 Hydramlter 0.01 0.005 SILT or CLAY 0 10 20 30 .-.c QI 'Qi 3: 40 » ..Cl... CI.I til 50 ... 0 0u 60 C 4l 0... Ol Q. 70 80 90 100 0.001 SAMPLE NO. W-80-302 (Grab Sampl MOISTURE DRY CONTENT DENSITY LL PI GP CLASSIFICATION a DESCRIPTION SAND~GRAVEL W/TRACE S~LT-'----'----------------------------1 Poorly Graded 70:c 0> 'Q; 3:60 >-..a I-., 50c: LL.... l: '.•., 400 I-., Q. 30 20 10 0'00 50 10 5 GRAVEL Coarse I Fine AH AH-IJ::IJ..J3 0.5 0.1 Groin Size in Millimeters SAND Medium I Fine 0.05 0.01 0.005 SILT or CLAY 20 30 .... .c: 0> '0; 3: 40 >- .Q...., "'50 I- 0 0u .... 60 l:., (J I-., Q. 70 80 90 100 0.001 SAMPLE NO.MOiSTURE J DRY CONTENT DENSITY LL PI SM CLASSIFICATION 8 DESCRIPTION AH-Dl-6 I I • I I SM .AH-Dl-7 I I I 1--1 SM I I AH-D2-3 SM AH-D2-4 1------1 I I I SM AH-D2-5 SM AH-D2-8 I I I I I SM AH-D2-9 I I I I I SM R ¢M CONSULTANTS,INC. BORROW AREA D SUMMARY OF GRAIN SIZE DISTRIBUTIONS DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 70:c 0> 'Q; 3:60 >-..a I-., 50c: LL.... l: '.., 400 I-., Q. 30 20 10 0'00 50 10 5 GRAVEL Coarse Fine AH AH 3 0.5 0.1 Groin Size in Millimeters SAND Medium Fine 0,05 0.01 0.005 SILT or CLAY 20 30 .... .c: 0> 'Q; 3: 40 >- .Q...., "'50 I- 0 0u .... 60 l:., (J I-., n. 70 80 90 100 0.001 SAMPLE NO,MOISTURE DRY CONTENT DENSITY LL PI SM CLASSIFICATION 8 DESCRIPTION AH-Dl-6 SM AH-Dl-7 SMI===-=e-.:--+-----I----I-----I----I-"'----II--------------------------------------f AH-D2-3 SM AH-D2-4 SM AH-D2-5 SM AH-D2-8 SM AH-D2-9 SM R ¢M C_O_N_S_U_L_T_A_N_T_S_,_IN_C_,__ BORROW AREA D SUMMARY OF GRAIN SIZE DISTRIBUTIONS DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 ro o N.... N -...I I''''..".....I''''....,....-~v ....'v I,.tV ""'v "'v ..,.....~...v IV IV'""'"TV c;.,vv ...,V I 1 ~'I I I I I I I I .........I--. "-.... ........... ~....... .." "-. "- """"- "- '"'"'"~ "- .......'-----. 100 90 80 70 :E 0>.Ci) ~60 >, .Q... Ql 50c lL 1- C Ql 400... Qla.. 30 20 10 0 100 u.s.Ston.dord Sieve Openings in Inches 50 10 GRAVEL. Coarse I Fine 5 U.S.Stondord Sieve Numbers 0.5 0.1 Groin Size in Millimeters SAND Medium I Fine 0.05 Hydrometer 0.01 0.005 SILT or CLAY 0 10 20 30 1-.s::. 01 .Ci) ~ 40 >, .Q... Ql., 50 ... 0 0 <.) 1- 60 c Ql 0... Q>a.. 70 80 90 100 0.001 SAMPLE NO. AH-01-5 (6.0-7.5') MOISTURE I DRY CONTENT DENSITY 11.1% L.L NV NP PI SM CLASSIFICATION a DESCRIPTION SILT AND SAND WITH TRACE GRAVEL AND TRACE CLAY Non Viscous,Non Plastic ro o N.... N 3 2 11/2 1 3/4 1/2 3/6 3 4 6 6 10 14 16 20 30 40 506070 100 140 200 270 I 1 ~'I I I I I I I I- ..........t--.. ~ -....... i'- ""'i',. "-"- ~ ""- Ie "'- ~." '"~ ....... I'-, r----, 100 90 80 70 :E 0>.Ci) ~60 >, .Q... Ql 50c lL 1- C Ql 400... Qla.. 30 20 10 u.s.Ston.dord Sieve Openings in Inches 50 10 GRAVEL. Coarse Fine 5 U.S.Stondord Sieve Numbers 0.5 0.1 Groin Size in Millimeters SAND Medium Fine 0.05 Hydrometer 0.01 0.005 SILT or CLAY 0 10 20 30 1-.s::. 01 .Ci) ~ 40 >, .Q... Ql., 50 ... 0 0 <.) 1- 60 c Ql 0... Q>a.. 70 80 90 100 0.001 SAMPLE NO. AH-01-5 (6.0-7.5') MOl TURE DRY CONTENT DENSITY 11.1% L.L NV NP PI SM CLASSIFiCATION a DESCRIPTION SILT AND SAND WITH TRACE GRAVEL AND TRACE CLAY Non Viscous,Non Plastic '"..Cl... Q)50c: lJ.......c: Q)400... Q)a.. 30 20 10 0 100 50 10 5 GRAVEL Coarse I Fine 0.5 0.1 Grain Size in Millimeters SAND Medium I Fine 0.05 0.01 0.005 SILT or CLAY ... '"CII 50 ... 0 0u.... 60 c: Q) 0... Q)a.. 70 80 90 100 0.001 SAMPLE NO. AH~Dl-6 (8.0-8.5') MOISfuRE I DRY CONTENT DENSITY 6.7% LL PI SM CLASSIFICATION a DESCRIPTION GRAVELLY SILTY SAND WITH TRACE CLAY R ¢M CONSULTANTS,INC. BORROW AREA D DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 40 '"..Cl... '"CII 50 ... 0 0u.... 60 c: Q) 0... Q)a.. 70 80 90 100 0.0010.01 0.005 SILT or CLAY 0.05 SAND 0.5 0.1 Groin Size in Millimeters Medium Fine GRAVEL Coarse Fine 60 '"..Cl... Q)50c: lJ.......c: Q)400... Q)a.. 30 20 10 0 100 50 10 5 CLASSIFICATION a DESCRIPTION GRAVELLY SILTY SAND WITH TRACE CLAYSM PILL 6.7% MOISTURE DRY CONTENT DENSITYSAMPLENO. --+..;:.::~::.::..:.-+-..:::..:;.;.:.;;:.:.:...:..-+----t----+-----r----------------------_.--------------I AH-Dl-6 (8.0-8.5') R ¢M'--__C_O_N_S_U_L_T_A_N_T_S_,_I_N_C_"__ BORROW AREA D DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 o o '"-..j N U.S.Stanllard Sieve Openings In Inches U.S.Standard Sieve Numbers Hydrometer 100 90 80 70 :i: 0>;;; 3:60 >. .Q.... Q)50r: u......c: Q)400.... Q) 0- 30 20 10 3 2 11/2 I 3(4 1/2 3/6 3 4 6 6 10 14 16 20 30 40 50 6070 100 140 200 270 1 ""\.1 1 1 I 1 I I I I "--..~ '""'"~ -...., ""-"'-"'-r-. 1', "" t'-. 'r---- ....... '"'---- 0 10 20 30 .... .<: 0> 'Qj 3: 40 >. .Q....... III 50 .... 0 0 U.... 60 c: Q) 0.... Q) 0- 70 80 90 0 100 50 Coarse GRAVEL 10 Fine 5 0.5 Grain Size SAND Medium 0.1 in Millimeters Fine 0.05 0.01 0.005 SILT or CLAY 100 0.001 SAMPLE NO. AH-Dl~7 (10.0-10.3' MOISTURE CONTENT 6.6% DRY DENSITY LL PI SM CLASSIFICATION a DESCRIPTION SILTY SAND WITH SOME GRAVEL.TRACE CLAY o o '"-..j N U.S.Stanllard Sieve Openings In Inches U.S.Standard Sieve Number.Hydrometer 100 90 80 70 :i: 0>;;; 3:60 >. .Q .... Q)50r: u......c: Q)400.... Q) 0- 30 20 10 3 2 11/2 I 3(4 1/2 3/6 3 4 6 6 10 14 16 20 30 40 506070 100 140 200 270 I ~I I I I I I I I \- '"'-Ill,. '"""~ -...... "- ""- """"'" "" ""......r---- ....... -...,'-- 0 10 20 30 .... .<: 0> 'Qj 3: 40 >. .Q ....... III 50 .... 0 0u .... 60 c: Q) 0.... Q) 0- 70 80 90 50 10 GRAVEL Coarse Fine 5 Q5 QI Grain Size in Millimeters SAND Medium Fine 0.05 0.01 0.005 SILT or CLAY 100 0.001 SAMPLE NO. AH-Dl~7 (10.0-10.3' MOISTURE CONTENT 6.6% DRY DENSITY LL PI SM CLASSIFICATION a DESCRIPTION SILTY SAND WITH SOME GRAVEL TRACE CLAY 80 70.....c 0>.;V 3:60 >. .0... <U<:50 u..... <: <U 400... <Ua.. 30 20 10 0 100 50 10 5 GRAVEL Coarse I Fine 0.5 0.1 Groin Size in Millimeters SAND Medium I Fine 0.05 0.01 0.005 SILT or CLAY 20 30 .... .c 0> ;V 3: 40 >. .0...... Ul 50 ... 0 0u.... 60 <: <U 0... <Ua.. 70 80 90 100 0.001 SAMPLE NO. AH-D2-3 <1.5-3.0') MOISTURE I DRY CONTENT DENSITY 25.7% LL NV PI NP SM CLASSIFICATION a DESCRIPTION SILTY GRAVELLY SAND W/TRACE CLAY R ¢M CONSULTANTS,INC. BORROW AREA D DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 80 70.....c 0>.;v 3:60 >. .0... <U<:50 u..... <: <U 400... <Ua.. 30 20 10 0 100 50 10 5 GRAVEL Coarse Fine 0.5 0.1 Groin Size in Millimeters SAND Medium Fine 0.05 0.01 0.005 SILT or CLAY 20 30 .... .c 0> <U 3: 40 >. .0...... Ul 50 ... 0 0u.... 60 <: <U 0... <Ua.. 70 80 90 100 0.001 SAMPLE NO. AH-D2-3 (1.5-3.0') MOISTURE DRY CONTENT DENSITY 25.7% LL NV PI NP SM CLASSIFICATION a DESCRIPTION SILTY GRAVELLY SAND W/TRACE CLAY R ¢M'--__C_O_N_S_U_L_T_A_N_T_S_,_IN_C_.__ BORROW AREA D DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 .... o '".." '" 3 2 I 1/2 I 3/4 1/2 3/6 3 4 6 6 10 14 16 20 30 40 50 60 70 100 140 200 270 l"'-I I I I I I I I I I I,... l"- I'---......~ ~ ~ '-.... "'- ""~ ""f', I'~ "I, ~ ~ " to-r-- 100 90 80 70.-.s:::. C>.iii ~60 >...c... Q)50c u.. .-c Q)400... Q) /l. 30 20 10 0 100 U.S.Sianpard Sieve Openings in Inche. 50 10 GRAVEL Coarse I Fine 5 U.S.Siandard Sievo Numb." 0.5 0.1 Grain Size in Millimeters SAND Medium I Fine 0.05 t1ydrom.lor 0.01 0.005 SILT or CLAY 0 10 20 30 .- .s:::. CIl 'ii ~ 40 >...c...., II> 50 ...c 0 U .... 60 c Q) 0... Q) /l. 70 80 90 100 0.001 SAMPLE NO. AH-D2-4 (3.0-4.5 ') MOISTURE I-DRY CONTENT OENSITY 11.4% LL 13.9 PI NP SM CLASSIFICATION a DESCRIPTION SILTY SAND WITH SOME GRAVEL,TRACE CLAY Non Plastic ~o '".." '" 3 2 I i/2 I 3/4 1/2 3/6 3 4 6 8 10 14 16 20 30 40 506070 100 140 200 270 ~t I I I I I I I I I I '....... r--... ""i'--.. ~ '..... """""'" 'I---. "-1""'- ~ ~ ....... , '"-I--' 100 90 80 70.-.s:::. C>.iii ~60 >...c... Q)50c u.. .-c Q)400... Q) /l. 30 20 10 u.s.Stanpard Sieve Openings in Inche. 50 10 GRAVEL Coarse Fine 5 u.S.Standard Sievo Numb." 0.5 0.1 Grain Size in Millimeters SAND Medium Fine 0.05 t1ydrom.lor 0.01 0.005 SILT or CLAY 0 10 20 30 .- .s:::. CIl ·ii ~ 40 >...c...., II> 50 ...c 0 U .... 60 c Q) 0... Q) /l. 70 80 90 100 0.001 SAMPLE NO. AH-D2-4 (3.0-4.5 ') MOISTURE DRY CONTENT DENSITY 11.4% LL 13.9 PI NP SM CLASSIFICATION a DESCRIPTION SILTY SAND WITH SOME GRAVEL,TRACE CLAY Non Plastic 80 70..-.c: 01 .~ ~60 >. .0 I- Q)50c lJ.. ..-c Q)400 I- Q)n. 30 20 10 0 100 50 10 5 GRAVEL Coarse I Fine 0.5 0.1 Grain Size in Millimeters SAND Medium I Fine 0.05 0.01 0.005 SILT or CLAY 20 30 ..-.c: 01 ~ ~ 40 >. .0 I-.,.. 50 I- 0 0u +- 60 c 4l> 0 I- Q)n. 70 80 90 100 0.001 SAMPLE NO. AH-D2-5 (4.5-6.0') MOISTURE I DRY CONTENT DENSITY 1.2% LL NV PI NP SM CLASSIFICATION a DESCRIPTION SILTY SAND WITH SOME GRAVEL,TRACE CLAY Non viscous,Non Plastic R $M CONSULTANTS,INC. BORROW AREA D DRAWN 8Y DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 80 70..-.c: 01 .~ ~60 >. .0 I- Q) 50c lJ.. ..-c Q)400 I- Q) n. 30 20 10 0 100 50 10 5 GRAVEL Coarse Fine 0.5 0.1 Grain Size in Millimeters SAND Medium Fine 0.05 0.01 0.005 SILT or CLAY 20 30 ..-.c: 01.;;; ~ 40 >. .0 I-.,.. 50 I- 0 0u +- 60 c 4l> 0 I- Q) n. 70 80 90 100 0.001 SAMPLE NO. AH-D2-5 (4.5-6.0') MOISTURE DRY CONTENT DENSITY 1.2% LL NV PI NP SM CLASSIFICATION a DESCRIPTION SILTY SAND WITH SOME GRAVEL TRACE CLAY Non viscous Non Plastic R $M C_O_N_S_U_L_T_A_N_T_S_,_I_N_C_"__ BORROW AREA D DRAWN 8Y DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 J o N ~ N 3 2 11/2 I 3'1 1/2 3/6 3 4 6 6 10 14 16 20 30 40 506070 100 140 200 270 1 IT .............1 I I I I I I I r---~t-- -""'1'.. "'"I'- ~ ~ i'-,. "" ~ "- f'... '"""'- ~ "- f--..I-- --- 100 90 80 70 +-.c 01 iii:=60 >. .t:l.. 41 50c u.. +- C 41 400.. 41a. 30 20 10 0 100 u.s.Stan~ard SievI Openings In Inches 50 10 GRAVEL Coarse I Fine 5 u.s.Standard Sieve Numbers 0.5 0.1 Grain Size in Millimeters SAND Medium I Fine 0.05 Hydrometer 0.01 0.005 SILT or CLAY 0 10 20 30 +-.c Ol ·iii:= 40 >. .t:l..... III 50 .. 0 0 U +- 60 c 41 0.....a. 70 80 90 100 0.001 SAMPLE NO.MOISTURE lORY CONTENT OENSITY LL PI CLASSIFICATION a DESCRIPTION AH-D2-8 I 11.3% (15 .0-16.5 I 15.5 2.2 SM SILTY SAND WITH TRACE GRAVEL,TRACE CLAY J o N ~ N u.s.Stan~ard SievI Openings In Inches u.s.Standard Sieve Numbers Hydrometer 100 90 80 70 +-.c 01 iii:=60 >. .t:l.. 41 50c u.. +- C 41 400.. 41a. 30 20 10 3 2 11/2 I 3'1 1/2 3/6 3 4 6 6 10 14 16 20 30 40 506070 100 140 200 270 I I 11 --.....I I I I I I r---~-..--......, I"-.. .~ ....... '"~ '"'"" "- 1"- r--... '"......, ~ "r-I--. 0 10 20 30 +-.c Ol ·iii:= 40 >. .t:l..... III 50 .. 0 0 U +- 60 c 41 0.....a. 70 80 90 50 10 GRAVEL Coarse Fine 5 0.5 0.1 Grain Size in Millimeters SAND Medium Fine 0.05 0.01 0.005 SILT or CLAY 100 0.001 SAMPLE NO.MOISTURE ORY CONTENT OENSITY LL PI CLASSIFICATION a DESCRIPTION AH-D2-8 11.3% (15 .0-16.5 I 15.5 2 2 SM SILTY SAND WITH TRACE GRAVEL TRACE CLAY 1: 0> i> ~60 S... '"50.=u......r: I)40u..... f1. 30 20 10 0'00 50 10 5 0.5 0.1 Grain Size in Millimeters 0.05 0.01 0005 40 >-.c..... til 50 ...a 0 U .... 60 r:..u..... Q.. 70 eo 90 100 0.001=n GRAVEL I SAND I_COQilL I Fine Coarse I Medium I Fine SILT or CLAY I SAMPLE NO. AH-D2-9 MOlsrUR£I DRY CONT£NT DENSITY 9.4% LL 17.5 PI 4.2 SH CLASSifiCATION a DESCRIPTION Silty sand with some gravel,clay. (20.0-21.5'i -I I I 1 1 1 '---f-I I ·-----jl---I I 1---1 1------------- I I I I I I ~ I I 1 1 I R $M CONSULTANTS,INC. BORROvl AREA D DRAWN BY --.l2L APPROVED BY DATE DEC.1980 PROJECT NO.052504 1: 0> 0 ~60 S... '"50.=u......r: I)40u..... f1. 30 20 10 0'00 50 10 0.5 0.1 Grain Size in Millimeters 0.05 0.01 0005 40 >-.c..... til 50 ...a 0 U.... 60 r:..u..... Q.. 70 eo 90 100 0.001 -c=:GRAVEL SAND ___~COillL_-LI_....:Fwii.!.!n~.l\!e __-L.~~~..L...-_~M::.::e'-"d~iu"-'m!.L----J__--'F'-'.i"'-ne"L.__-J.S_I_LT_or_C_L_AY --1 SAMPLE NO. AH-D2-9 M I TURE DRY CONTENT DENSITY 9.4% LL 17.5 PI 4.2 SH CLASSifiCATION a DESCRIPTION Silt sand with some gravel,clay. (20.0-21.5~i----"'----f ---1----+-----1·---------------------------------------I 1-------1----1-----1----1---------;----·-----,----------------'---'--------------1 ------1----1----1-------1----1----·---------- ------11----1-----1------1----1------1----------------------------------------f .------I---,-f----I-----J---- R $M'--__C_O_N_S_U_L_T_A_N_T_S_,_I_N_C._,__ BORROvl AREA D DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO,052504 ) o ~ " U.S.Stan,dard Siovo Openings in Inch ..U.S.Standard Si.v.Numbors Hydrom.ter 0 10 20 30 .C 0> 0; 3: 40 >. ..Q... '"., 50 ...a 0u C60Cll 0... Cll Q. 70 80 90 100 01 3 2 I III I 3/4 1/23/8 3 4 6 8 10 14 16 20 30 40 506070 100 140 200 270I'\.1"\I I ........I I I I I I I r\\,,,,,I--........~ ~\,,,'"\r0-. '\\\'"1\\\ \I\~\\,\. I~"\i'\\\. \\~~\\ \\~,\\ \ \ "~i"-\ \ \.HI rJ:;-;t \~"""\.\f\ \'"'"\\,11 -.,- r--~~""\ \ ~~~\ "''"'i'...\1\~"I'..""'-.j H E9- ......."-.....~u_~,1\ !'-.1"-.,"H E9-b"~~---~..... t H E~- 100!lO 10 !I I 0 !I 0 I 'tt (loP - 100 90 80 70.....c Ol 0; 3:60 >. ..Q... '"50c LL....c•'"40'.0... '"Q. 30 20 10 0 GRAVEL Coarse I Fine Grain Size in Millimeters SAND Medium I Fine SILT or CLAY SAMPLE NO.MOISTURE lORY CONTENT OENSITY LL PI CLASSIFICATION a DESCRIPTION ..np-cl!-J I I I I I I I AH-El-4 AH-E3-6 AH-E3-7 AH-E4-6 U.S.Stan,dard Siovo Openings in Inchu U.S.Standard Si.v.Numbors Hydram.tor 100 90 80 70.....c Ol 0; 3:60 >. ..Q... '"50c LL....c '.'"400... '"Q. 30 20 10 0 3 2 I III I 3/4 1/23/8 3 4 6 8 10 14 16 20 30 40 506070 100 140 200 270 I\.''''........,I I I I I I f\.,[\."..............~ ~1\\"'"\\\ '\\\"\\\ \~~\\,,\ """'-1\"\\\. \\~"\'\ \\~I'...i\\ \ \"~~\\\.hn or:.-Ii \'""\\ '"'"\\fU -..,-r\ ~1'-........""\\ "'<:::::~r-.'\ "'i'-........~\1\ ~."\...............H E ~-I'... ""~~lu _~'k 1'-......I'."-'"H E 9- r-......I'-.......~--......~'7 iH E~_7 h 100 50 10 5 I 0.5 0.1 'tt.65"0.01 0.005 0.00 0 10 20 30 .C 0> '"3: 40 >. ..Q... '"., 50 ...a 0u 60 C Cll 0... Cll Q. 70 80 90 100 I GRAVEL Coarse Fine Grain Size in Millimeters SAND Medium Fine SILT or CLAY SAMPLE NO.MOISTURE DRY CONTENT DENSITY LL PI CLASSIFICATION a DESCRIPTION "-~::.J,;.L~.L--lf----+---I----+---f---I------------------------------------J AH-El-4 AH-E3-6 AH-E3-7 AH-E4-6 80 70.....s= 0> iii ~60 >. .Cl... a>50l: u.. +- l: a>400... a>a. 30 20 10 0 100 50 10 5 GRAVEL Coarse I Fine 0.5 0.1 Groin Size in Millimeters SAND Medium I Fine 0.05 0.01 0.005 SILT or CLAY 20 +-30 .s= 0' 'iii ~ 40 >. .Cl... CI>., 50 ... 0 0 0 +- 60 l: a> 0 L- a>a. 70 80 90 100 0.001 SAMPLE NO. AH-El-3 MOISTURE I DRY CONTENT DENSITY 19.6% LL PI SM CLASSIFICATION a DESCRIPTION SILTY SAND R ¢M CONSULTANTS,INC. BORROW AREA E DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 80 70.....s= 0> iii ~60 >. .Cl... a>50l: u.. +- l: a>400... a>a. 30 20 10 0 100 50 10 5 GRAVEL Coorse Fine 0.5 0.1 Groin Size in Millimeters SAND Medium Fine 0.05 0.01 0.005 SILT or CLAY 20 30 +-.s= 0'.iii ~ 40 >. .Cl... CI>., 50 ... 0 0 0 +- 60 l: a> 0 L- a>a. 70 80 90 100 0.001 SAMPLE NO. AH-El-3 MOISTURE DRY CONTENT DENSITY 19.6% LL PI SM CLASSIFICATION a DESCRIPTION SILTY SAND R ¢M'--__C_O_N_S_U_L_T_A_N_T_S_,_I_N_C_,__ BORROW AREA E DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 :3 2 I 1/2 I 3/4 1/2 3/8 3 4 6 8 10 14 16 20 30 40 50 60 70 100 140 200 270 \I I I I I I t I I I I I r\. \ \ lit \ \ \ 1\ 1\ ........I'-.. I~ ~ ""I'... ....~ ~ iii 100 90 80 70-.c 0> iii ==60 >. .Q L. Q)50c u.-c Q)400 L. Q) 0- 30 20 10 0 100 u.S.Stanllard Sieve Openings in Inch.. 50 10 GRAVEL Coarse I Fine 5 U.S.Standard Sieve Numl>ers 0.5 0.1 Grain Size in Millimeters SAND Medium I Fine 0.05 Hydram.ter 0.01 0.005 SILT or CLAY 0 10 20 -30 .c 0> 'il ==40 >. .Q L. '".. 50 L. 0 0 U-c60Q) 0 L. Q) 0- 70 80 90 100 0.001 SAMPLE NO.MOISTuRE I DRY CONTENT DENSITY 0.7% LL PI GW CLASSIFICATION a DESCRIPTION SANDY GRAVEL Well Graded u.S.Stanllard Sieve Openings in Inch..U.S.Standard Sieve Numl>ers Hydram.ter 100 90 80 70-.c 0> iii ==60 >. .Q L. Q)50c u.-c Q)400 L. Q) 0- 30 20 10 :3 2 I 1/2 I 3/4 1/2 3/8 3 4 6 8 10 14 16 20 30 40 506070 100 140 200 270 '\I iI t I I I I II I I I I f\. \ \ It \ \ \. \ i\ "'"'-~ ~ 'i'-.. ....~ ~ 0 10 20 30 -.c 0> 'il ==40 >. .Q L. '".. 50 L. 0 0 U-60 c Q) 0 L. Q) 0- 70 80 90 50 10 GRAVEL Coarse Fine 0.5 0.1 Grain Size in Millimeters SAND Medium Fine 0.05 0.01 0.005 SILT or CLAY 100 0.001 SAMPLE NO.MOISTURE DRY CONTENT DENSITY 0.7% LL PI GW CLASSIFICATION a DESCRIPTION SANDY GRAVEL Well Graded 80 70.....s::: 0> iii ~60 >, .0 .... Q)50c: lL....c: Q)400.... Q) Q. 30 20 10 0 100 50 10 5 GRAVEL Coarse I Fine 0.5 0.1 Grain Size in Millimeters SAND Medium I Fine 0.05 0.01 0.005 SILT or CLAY 20 30 .... .s::: CJ> 'iii ~ 40 >, .0 .... Q) '"50 .... 0 0u .... 60 c: Q> 0.... Q) Q. 70 80 90 100 0.001 SAMPLE NO. AH~E4-6 5.0-6.5') MOISTURE I -DRY CONTENT DENSITY 17.6% LL PI SM CLASSIFICATION 8 DESCRIPTION SILTY SAND WITH TRACE GRAVEL I I I I I I I I R ¢M CONSULTANTS,INC. BORROW AREA E DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 80 70.....s::: 0> iii ~60 >, .0 .... Q) 50c: lL....c: Q)400.... Q) Q. 30 20 10 0 100 50 10 5 GRAVEL Coarse Fine 0.5 0.1 Groin Size in Millimeters SAND Medium Fine 0.05 0.01 0.005 SILT or CLAY 20 30 .... .s::: CJ> 'iii ~ 40 >, .0 .... Q) '"50 .... 0 0u .... 60 c: Q> 0.... Q) Q. 70 80 90 100 0.001 SAMPLE NO. 5.0-6.5') MOISTURE DRY CONTENT DENSITY 17.6% LL PI SM CLASSIFICATION 8 DESCRIPTION SILTY SAND WITH TRACE GRAVEL t------+----1:----t----I----t----t----------------------,----------------1 R ¢M C_O_N_S_U_L_T_A_N_T_S_,_I_N_C_,__ BORROW AREA E DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 o o N "-I U.S.Slanllard Sieve Openings in Inche.U.S.Standard Sieve Number.Hydrometer 3 2 I 112 I 3/4 1/2 3/8 3 4 6 8 10 14 16 20 30 40 506070 100 140 200 270 0100I~I II I II I I I I I I I I I I \ 90 10 \ 80 \20\ 30 ..... 70 .s::.....\0> .s::'4; 0>\~4; ~60 40 >-\..Q >-.....Q \CI>..... Gl 50 50 ...c::0 Ii.0 U.....i'.....c:: CI>60 c:: 0 40 ~Gl...0 Gl r-..... a..Gl ~a.. 30 ~70 '"20 80 10 "90-----l-100010050105I0.5 0.1 0.05 0.01 0.005 0.001 Groin Size in Millimeters I GRAVEL I SAND I SILT or CLAYICoorseIFineICoorseIMediumIFineI SAMPLE NO.MOISTURE DRY LL PI CLASSIFICATION a DESCRIPTIONCONTENTDENSITY AH-E7-3 2.3%GP SANDY GRAVEL WITH TRACE SILT (2.0-3.0') FFJiBJ N@hW Ndmit ijijg WNm MY;iNmW i;!;iiii'! o o N "-I N U.S.Slanllard Sieve Openings in Inche.U.S.Standard Sieve Number.Hydrometer 3 2 11/2 I 3/4 1/2 3/8 3 4 6 8 10 14 16 20 30 40 506070 100 140 200 270 0100~I I I I I I I I I I \ 90 i\10 80 \20\ 30 ..... 70 .s::.....\0> .s::'4; 0>\~4; ~60 40 >- \,..Q >-.....Q CI>...\.. Gl 50 50 ...c::0 Ii.0 U.....r-........c:: CI>60 c:: 0 40 Gl..."0 Gl ... Gla..~a.. 30 ~70 """20 80 " 10 i"-t-.90---!---. 0 100 100 50 10 5 I 0.5 0.1 0.05 0.01 0.005 0.001 Groin Size in Millimeters I GRAVEL I SAND I I Coorse I Fine I Coorse Medium Fine I SILT or CLAY SAMPLE NO.MOiSTURE DRY LL PI CLASSIFICATION a DESCRIPTIONCONTENTDENSITY AH-E7-3 2.3%GP SANDY GRAVEL WITH TRACE SILT (2.0-3.0') Mi:;ili Y@!W 'WWii:!ii fiXi ii!PJi JWW iiB:;!!JYJ!iYYMHiiijMHiiiiW iiiWWW'!?i iM'!?/iJiiXi/tiMe yyiitiii/iXiii'iiXiWikiiii/i/ 80 70-.s:: C>.4) 3;60 >. .0... Q)50c u.-c Q)400... Q)a. 30 20 10 0 100 50 10 5 GRAVEL Coarse I Fine ~5 ~I Grain Size in Millimeters SAND Medium I Fine 0.05 0.01 0.005 SILT or CLAY 20 30 -.s:: Ol '4) 3; 40 >. .0... CI1 Ul 50 ... 0 0u ..... 60 c Q) 0... Q)a. 70 80 90 100 0.001 SAMPLE NO. AH-E9-2 (1.5-3.0') MOISTURE I DRY CONTENT DENSITY 15.7% LL PI SM CLASSIFICATION a DESCRIPTION SILTY SAND Poorly Graded R $M CONSULTANTS,INC. BORROW AREA E DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 80 70-.s:: C>.4) 3;60 >. .0... Q)50c u.-c Q)400... Q)a. 30 20 10 0 100 50 10 5 GRAVEL Coarse Fine ~5 ~I Grain Size in Millimeters SAND Medium Fine 0.05 0.01 0.005 SILT or CLAY 20 30 -.s:: Ol '4) 3; 40 >. .0... CI1 Ul 50 ... 0 0u ..... 60 c Q) 0... Q)a. 70 80 90 100 0.001 SAMPLE NO. AH-E9-2 (1.5-3.0') MOISTURE DRY CONTENT DENSITY 15.7% LL PI SM CLASSIFICATION a DESCRIPTION SILTY SAND Poorly Graded R $M C_O_N_S_U_L_T_A_N_T_S_,_,N_C_"__ BORROW AREA E DRAWN BY DL APPROVED BY DATE DEC.1980 PROJECT NO.052504 U.s.Stanpard Sieve Openings in Inch ..U.S.Standard Si.ve Numb.rs Hydrom.ter 100 90 80 70.... .t= 0> CD 3:60 >. .Q.... <II 50c lL..... C <II 400.... <IIa. 30 20 10 --..,-0'__,_-............•......_...._'oJ'p.".......v,",............,.............._.... I ",.I I I I I I I I I I "'-"\ \ \ \ "- ~ '"~ .....r-........ ~ ~ I'- 0 10 20 ....30 .t= 0- 'Q) 3: 40 >. .Q .... QJ III 50 .... 0 0 (J .... 60 c <II 0.... <IIa. 70 80 90 0 100 50 10 GRAVEL Coorse I Fine 5 Q5 QI Groin Size in Millimeters SAND Medium I Fine 0.05 0.01 0.005 SILT or CLAY 100 0.001 SAMPLE NO. AH-E9-6 (6.5-8.0' MOISTURE lORY CONTENT OENSITY 4.4% LL PI GM CLASSIFICATION a DESCRIPTION SANDY GRAVEL WITH SOME SILT U.s.Stanpard Sieve Openings in Inch..U.S.Standard Si.ve Numb.rs Hydrom.ter 100 90 80 70.... .t= 0> CD 3:60 >. .Q.... <II 50c lL..... C <II 400.... <IIa. 30 20 10 3 2 11/2 I 3/4 1/2 3/8 3 4 6 8 10 14 16 20 30 40 506070 100 140 200 270 ~.I I I I I I I I I I I "-"\ ;\ r\ \ "- "- ""~ ....."'- ~ ~ 0 10 20 30 .... .t= 0- 'Q) 3: 40 >. .Q .... QJ III 50 .... 0 0 (J .... 60 c <II 0.... <IIa. 70 80 90 50 10 GRAVEL Coorse Fine 5 Q5 QI Groin Size in Millimeters SAND Medium Fine 0.05 0.01 0.005 SILT or CLAY 100 0.001 SAMPLE NO. AH-E9-6 (6.5-8.0' MOISTURE DRY CONTENT DENSITY 4.4% LL PI GM CLASSIFICATION a DESCRIPTION SANDY GRAVEL WITH SOME SILT estProcedureUsed__...:;T:;...-..;:1:;..::8:,.:0:......;:,.M::.;:e:,.:t'-='h:.:::o;.;::d'--"....,A'-"_--:;;:AA=S.::::H.=.T.=.O_____S_S_._9__%PlasticUmit%PlasticityIndex_-:3""3"-'•....,2=--_estResults:MaximumDryDensity__1_0_2_•...:;S'--PCFOptimumWaterContent_--<.2...::..2.....D0/0403020%NaturalDryDensityPCFSpecificGravity_WATERCONTENT-PERCENTOFDRYWEIGHT10SILTANDCLAYProjeelNo.---,:-:05;:..:2:..:5;:..:0:...;4=--_Dale.=1.=1_-=.2.:::..0-_8:::.0:::.-_R8MConsultantInc.Dea~manCreekSampleNo.W-80-282LABORATORYCOMPACTIONCONTROLREPORTAcresAmericanInc.II,\I I1II"IIIIII\.I1I...u"'""!I1,1I1VI!,,~!11IiI/'I",i"lbIIII.-/'",,1.<7I1I1/'I"'{y~iI....j/'"I"I"!IIvjI!i"VA!IIYIIi"I.'<?~iI./IIII"l"IYIIIII"'\JIIII1I1"1\I I1I·IiI:"I1III1I"QI1III1II:'{"i1IIi11I"'",1I1II11"1\Ii!!:III"IIi1I1I1!"II1!IjI\lIIII1!I"IIIII1I "I!1iiIIhIIIi,iII,IIi,I!I,I I.'II-I,IIii,IIiii!I!!IiI!II,I,III1IiII;IIiIIIiII!i!IIIjII:II,,!iII!I1iiiIII,III,I,III!,,II,,iII100ameandLocationSu_s_it_n_a_...:...<W_a_t_a_n...:...a:.:.....,:D::..;am==---=S::..;J.:..:·t::..:e:::..!)~_UnifiedAASHOaterialMarkAClassification__C_L_-_C_HClassification__aturalWaterContent42.19.;°909.Sb81.3~69.6(.)SO.8~(.)a:wa..ena:l80....J>-c-Uizw0>-0::070estProcedureUsed__...:;T:;...-..;:1:;..::8:,.:0:......;:,.M::.;:e:,.:t'-='h:.:::o;.;::d'--"....,A'-"_--:;;:AA=S.::::H.=.T.=.O_____S_S_._9__%PlasticUmit%PlasticityIndex_-:3""3"-'•....,2=--_estResults:MaximumDryDensity__1_0_2_•...:;S'--PCFOptimumWaterContent_--<.2...::..2.....D0/0403020%NaturalDryDensityPCFSpecificGravity_WATERCONTENT-PERCENTOFDRYWEIGHT10SILTANDCLAYProjeelNo.---,:-:05;:..:2:..:5;:..:0:...;4=--_Dale.=1.=1_-=.2.:::..0-_8:::.0:::.-_R8MConsultantInc.Dea~manCreekSampleNo.W-80-282LABORATORYCOMPACTIONCONTROLREPORTAcresAmericanInc.II,\I I1II"IIIIII\.I1I...u"'""!I1,1I1VI!,,~!11IiI/'I",i"lbIIII.-/'",,1.<7I1I1/'I"'{y~iI....j/'"I"I"!IIvjI!i"VA!IIYIIi"I.'<?~iI./IIII"l"IYIIIII"'\JIIII1I1"1\I I1I·IiI:"I1III1I"QI1III1II:'{"i1IIi11'"'",1I1II,1"1\Ii!!:III"IIi1I1I1!"II1!IjI\lIIII1!I"IIIII1I"I!1iiIIhIIIi,iII,IIi,I!I,I I.'II-I,IIii,IIiii!I!!IiI!II,I,III1IiII;IIiIIIiII!i!IIIjII:II,,!iII!I1iiiIII,III,I,III!,,II,,iII100ameandLocationSu_s_it_n_a_...:...<W_a_t_a_n...:...a:.:.....,:D::..;am==---=S::..;J.:..:·t::..:e:::..!)~_UnifiedAASHOaterialMarkAClassification__C_L_-_C_HClassification__aturalWaterContent42.19.;°909.Sb81.3~69.6(.)SO.8~(.)a:wa..ena:l80....J>-c-Uizw0>-0::070 10WATERCONTENT-PERCENTOFDRYWEiGHT5130135>-t-V;~125o>-0::o100959389878680t;76fi:58~26.9~9.20::3.olf1.3eriaJ..JSize%PassingSieveAnalysisC.TestResults:MaximumDryDensity__=1=3=5.=....0=--PCF8.TestProcedureUsed__-'T::...-....:l::.:8::.:0:...-"-=D:...."_---"'AA~S=.oHo:.T~O___LiquidLimitNonViscous%PlasticLimit%PlasticityIndex_=:.::.-=..=,SourceofMaterialDeadmanCreekSampleNq.W-80-300NaturalWaterContent--&...-695%NaturalDryDensityPCFSpecificGravBUnifiedMaterialMarkClassification__SM_A.DescriptionofSciI:WellGraded'Till'-GRAVELLY,SILTYContractor_"__RaMConsultantInc.LABORATORYCOMPACTIONCONTROLREPORTProjectNo.Date__....ArchiteetorEngineerAcresAmericanInc.JobNameandLocationSusitnaWatanaDam2IIl~"1 "3/4"1/2"3/8"#4#10#40#200.o2nun.005.00210WATERCONTENT-PERCENTOFDRYWEiGHT5130135>-t-V;~125o>-0::o100959389878680t;76fi:58~26.9~9.20::3.olf1.3eriaJ..JSize%PassingSieveAnalysisC.TestResults:MaximumDryDensity__=1=3=5.=....0=--PCF8.TestProcedureUsed__-'T::...-....:l::.:8::.:0:...-"-=D:...."_---"'AA~S=.oHo:.T~O___LiquidLimitNonViscous%PlasticLimit%PlasticityIndex_=:.::.-=..=,SourceofMaterialDeadmanCreekSampleNq.W-80-300NaturalWaterContent--&...-695%NaturalDryDensityPCFSpecificGravBUnifiedMaterialMarkClassification__SM_A.DescriptionofSciI:WellGraded'Till'-GRAVELLY,SILTYContractor_"__RaMConsultantInc.LABORATORYCOMPACTIONCONTROLREPORTProjectNo.Date__....ArchiteetorEngineerAcresAmericanInc.JobNameandLocationSusitnaWatanaDam2IIl~"1 "3/4"1/2"3/8"#4#10#40#200.o2nun.005.002 WATERCONTENT-PERCENTOFDRYWEIGHT1510%NaturalDryDensityPCFSpecificGravity_5PoorlyGraded'Till'rSILTYGRAVELANDSANDUnifiedClassificationGC-SCBorrowAreaHSampleNo,W-80-256,I \I11 \IIII1\I1III\II IiI1\111I\1!I\.III1\IIIIIII \1IIIII\IIIIIIIJ'\IIIr\I...\I1!. IT\.\~.1I/I"\'nII1I1II'\\\.1'...II1/I'\.\III/ III"\9..1I1IIII\...\AIII11/I1\Y,kII1"\II/11\:\1IjII'IiI1ITII1I1\1/II:1J\1-yIiI\1II1II1I._1.,1!:I!II,IiIi\IiIIIII\ III1I1!\1IIi1!"-I:III,1\I;II;;\II!II,\IiIjI!i\III1,II,I1I\IR8 MConsultantInc.LABORATORYCOMPACTIONCONTROLREPORTProjectNo.-::0::--:5~2~5~0::....4::-_Oate__--=1::.::1=---=2:,..:0::....--=8:...:0"--_MaterialMarkC_LiquidLimit__2_1_,_7%PlasticUmit%PlasticityIndex-'9!......~2~_SourceofMaterial--=-,.--..:.--------------NaturalWaterContent10,9ntractor'--_bNameandLocationSusitna(WatanaDamSite).TestProcedureUsed....T_-..l-""8-""0--""M...e....tb...o"""d"""-_t1D""--t1_-_AA=""-SH....T.=..O"'-_%Passing10095881408481787164I-0530lL.38,2(.)24,3iii135:::l13.6(.)8,6a::wc-uiCD..J>-I-enz130wCl>-a::ClrchitectorEngineerAcresAmericanInc,.TestResults:MaximumDryDensity_l_3_9_,_0PCFOptimumWaterContent6,2%WATERCONTENT-PERCENTOFDRYWEIGHT1510%NaturalDryDensityPCFSpecificGravity_5PoorlyGraded'Till'rSILTYGRAVELANDSANDUnifiedClassificationGC-SCBorrowAreaHSampleNo,W-80-256,I \I11 \IIII1\I1III\II IiI1\111I\1!I\.III1\IIIIIII \1IIIII\IIIIIIIJ'\IIIr\I...\I1!.IT\.\~.1I/I"\'nII1I1II'\\\.1'...II1/I'\.\III/ III"\9..1I1IIII\...\AIII11/I1\Y,kII1"\II/11\:\1IjII'IiI1ITII1I1\1/II:1J\1-yIiI\1II1II1I._1.,1!:I!II,IiIi\IiIIIII\ III1I1!\1IIi1!"-I:III,1\I;II;;\II!II,\IiIjI!i\III1,II,I1I\IR8MConsultantInc.LABORATORYCOMPACTIONCONTROLREPORTProjectNo.-::0::--:5~2~5~0::....4::-_Oate__--=1::.::1=---=2:,..:0::....--=8:...:0"--_MaterialMarkC_LiquidLimit__2_1_,_7%PlasticUmit%PlasticityIndex-'9!......~2~_SourceofMaterial--=-,.--..:.--------------NaturalWaterContent10,9ntractor'--_bNameandLocationSusitna(WatanaDamSite).TestProcedureUsed....T_-..l-""8-""0--""M...e....tb...o"""d"""-_t1D""--t1_-_AA=""-SH....T.=..O"'-_%Passing10095881408481787164I-0530lL.38,2(.)24,3iii135:::l13.6(.)8,6a::wc-uiCD..J>-I-enz130wCl>-a::ClrchitectorEngineerAcresAmericanInc,.TestResults:MaximumDryDensity_l_3_9_,_0PCFOptimumWaterContent6,2% Woodward-ClydeConsultantsFINALREPORTSUSITNAHYDROELECTRICPROJECTSEISMIC;REFRACTIONSURVEYSUMMER,1980SubmittedToR&MConsultants5024CordovaAnchorage,Alaska99502Woodward-ClydeConsultantsFINALREPORTSUSITNAHYDROELECTRICPROJECTSEISMIC;REFRACTIONSURVEYSUMMER,1980SubmittedToR&MConsultants5024CordovaAnchorage,Alaska99502 Enclosedare10copiesofourFinalReportfromthegeo-physicalsurveyconductedunderouragreementofJuly23,1980.ThisreportreflectsyourcommentsandthoseofAcresAmericantoourdraftreportdatedOctober23,1980.AsrequestedbyMr.RobertHenschelofAcresAmericaninourmeetingearlierthismonth,wearepreparingasetofrecommendedadditionalsurveystoinvestigateareaswhereuncertaintiesstillexist.Theserecommendationswillbeforwardedunderseparatecover.Mr.Henschelalsorequestedrevisionoftheprofilefiguresinthisreporttoreflecttrueelevationsratherthanrelativeelevations.Wewillmaketheappropriatechangesandforwardreviseddraftswhendatumelevationsbecomeavailable.Wehaveenjoyedworkingwithyouonthisproject.callusifyouhaveanyquestionsorcomments.Please~c~DennisE.JensenProjectGeophysicistWoodward-ClydeConsultantsFINALREPORT-SUSITNAHYDROELECTRICPROJECTSEISMICREFRACTIONSURVEY,SUMMER,1980Attention:Mr.GarySmithGentlemen:19December1980projectNo.41306IR&MConsultants5024CordovaAnchorage,Alaska99502SUBJECT:JDRfDEJjabEnclosuresVerytrulyyours,~e~DeputyDirectorofGeophysicsfficesinOtherPrincIpalCitiesonsultlOgEngineers.GeologistsndEnvironmentalScientists4000WestChapmanAvenuePostOfficeBox1149Orange.California92668(714)634-4440Telex68-3420Enclosedare10copiesofourFinalReportfromthegeo-physicalsurveyconductedunderouragreementofJuly23,1980.ThisreportreflectsyourcommentsandthoseofAcresAmericantoourdraftreportdatedOctober23,1980.AsrequestedbyMr.RobertHenschelofAcresAmericaninourmeetingearlierthismonth,wearepreparingasetofrecommendedadditionalsurveystoinvestigateareaswhereuncertaintiesstillexist.Theserecommendationswillbeforwardedunderseparatecover.Mr.Henschelalsorequestedrevisionoftheprofilefiguresinthisreporttoreflecttrueelevationsratherthanrelativeelevations.Wewillmaketheappropriatechangesandforwardreviseddraftswhendatumelevationsbecomeavailable.Wehaveenjoyedworkingwithyouonthisproject.callusifyouhaveanyquestionsorcomments.Please~c~DennisE.JensenProjectGeophysicistWoodward-ClydeConsultantsFINALREPORT-SUSITNAHYDROELECTRICPROJECTSEISMICREFRACTIONSURVEY,SUMMER,1980Attention:Mr.GarySmithGentlemen:19December1980projectNo.41306IR&MConsultants5024CordovaAnchorage,Alaska99502SUBJECT:JDRfDEJjabEnclosuresVerytrulyyours,~e~DeputyDirectorofGeophysicsfficesinOtherPrincIpalCitiesonsultlOgEngineers.GeologistsndEnvironmentalScientists4000WestChapmanAvenuePostOfficeBox1149Orange.California92668(714)634-4440Telex68-3420 TABLEOFCONTENTSWoodward-ClydeConsultantsand80-15............................4-115.0GENERALOBSERVATIONSANDCONCLUSIONS.•......5-1REFERENCESFIGURESAPPENDIXA1-11-11-22-13-14-14-14-34-54-64-84-94-104-101.0INTRODUCTION..•....•••••..•..••.••.••..•.••.1.1Purpose*,•••••••••••1.2ScopeofWork.2.0DATAACQUISITION.•..•.••••.••...•...••••.••.3.0DATAREDUCTIONPROCEDURES.••..•....•••.•.••.4.0DISCUSSIONOFRESULTS.•.•..•..•...•.•.•.•...4.1Traverse80-1.4.2Traverse80-2.4.3Traverse80-3.4.4Traverse80-6.4.5Traverse80-7.4.6Traverse80-8.4.7Traverse80-9.4.8Traverse80-11.4.9Traverses80-12,80-13,LETTEROFTRANSMITTALTABLEOFCONTENTSTABLEOFCONTENTSWoodward-ClydeConsultantsand80-15............................4-115.0GENERALOBSERVATIONSANDCONCLUSIONS.•......5-1REFERENCESFIGURESAPPENDIXA1-11-11-22-13-14-14-14-34-54-64-84-94-104-101.0INTRODUCTION..•....•••••..•..••.••.••..•.••.1.1Purpose*,•••••••••••1.2ScopeofWork.2.0DATAACQUISITION.•..•.••••.••...•...••••.••.3.0DATAREDUCTIONPROCEDURES.••..•....•••.•.••.4.0DISCUSSIONOFRESULTS.•.•..•..•...•.•.•.•...4.1Traverse80-1.4.2Traverse80-2.4.3Traverse80-3.4.4Traverse80-6.4.5Traverse80-7.4.6Traverse80-8.4.7Traverse80-9.4.8Traverse80-11.4.9Traverses80-12,80-13,LETTEROFTRANSMITTALTABLEOFCONTENTS Woodward-ClydeConsultantsLISTOFFIGURESFigure1.LocationofSeismicRefractionLines-WatanaDamsiteFigure2.LocationofSeismicRefractionLines-WatanaborrowAreasBandDFigure3.LocationofSeismicRefractionLines-WatanaBorrowAreaEFigure4.LocationofSeismicRefractionLines-Devil'sCanyonAreaFigure5.SeismicRefractionProfile80-1Figure6.SeismicRefractionProfile80-2Figure7.SeismicRefractionProfile80-3Figure8.SeismicRefractionProfile80-6Figure9.SeismicRefractionProfile80-7Figure10.SeismicRefractionProfile80-8Figure11.SeismicRefractionProfile80-9Figure12.SeismicRefractionProfile80-11Figure13.SeismicRefractionProfiles80-12and80-15Figure14.SeismicRefractionProfile80-13Woodward-ClydeConsultantsLISTOFFIGURESFigure1.LocationofSeismicRefractionLines-WatanaDamsiteFigure2.LocationofSeismicRefractionLines-WatanaborrowAreasBandDFigure3.LocationofSeismicRefractionLines-WatanaBorrowAreaEFigure4.LocationofSeismicRefractionLines-Devil'sCanyonAreaFigure5.SeismicRefractionProfile80-1Figure6.SeismicRefractionProfile80-2Figure7.SeismicRefractionProfile80-3Figure8.SeismicRefractionProfile80-6Figure9.SeismicRefractionProfile80-7Figure10.SeismicRefractionProfile80-8Figure11.SeismicRefractionProfile80-9Figure12.SeismicRefractionProfile80-11Figure13.SeismicRefractionProfiles80-12and80-15Figure14.SeismicRefractionProfile80-13 Woodward·ClydeConsultants1.0INTRODUCTIONThisreportpresentstheresultsofaseismicrefractionsurveyperformedduringJuneandJuly,1980,ontheUpperSusitnaRiver,Alaska,approximately125milesnorthofAnchorage.ThesurveywasperformedundercontractwithR&MConsultantsaspartoftheirsubcontractwithAcresAmericanIncorporated.MostofthesurveywasperformedontheabutmentsandinborrowareasfortheproposedearthandrockfilldamneartheconfluenceofWatanaCreekandtheSusitnaRiver.ThelocationsoflinesrunattheWatanasiteareshownonFigures1,2,and3.TheremainderofthesurveywasperformedacrossapossiblesaddledamlocationadjacenttoaproposedconcretedamatDevilCanyon,approximately27mileswestoftheWatanasite.ThelocationsoflinesattheDevilCanyonsiteareshownonFigure4.1.1PurposeThepurposeofthissurveyistoprovideadditionaldataforthecontinuingfeasibilitystudiesfortheSusitnaHydroelectricProjectproposedbytheAlaskaPowerAu-thority.Thissurveyistosupplementborings,geologicmapping,andpreviousgeophysicalsurveysaccomplishedoverthepastseveralyears.LinelocationswereselectedbyAcresAmericanbasedonpreviousstudies.Linelengths,geophonespacingandfieldproceduresweredesignedtoinvestigatethenatureanddistributionofbedrockandoverburdenmaterials.Woodward·ClydeConsultants1.0INTRODUCTIONThisreportpresentstheresultsofaseismicrefractionsurveyperformedduringJuneandJuly,1980,ontheUpperSusitnaRiver,Alaska,approximately125milesnorthofAnchorage.ThesurveywasperformedundercontractwithR&MConsultantsaspartoftheirsubcontractwithAcresAmericanIncorporated.MostofthesurveywasperformedontheabutmentsandinborrowareasfortheproposedearthandrockfilldamneartheconfluenceofWatanaCreekandtheSusitnaRiver.ThelocationsoflinesrunattheWatanasiteareshownonFigures1,2,and3.TheremainderofthesurveywasperformedacrossapossiblesaddledamlocationadjacenttoaproposedconcretedamatDevilCanyon,approximately27mileswestoftheWatanasite.ThelocationsoflinesattheDevilCanyonsiteareshownonFigure4.1.1PurposeThepurposeofthissurveyistoprovideadditionaldataforthecontinuingfeasibilitystudiesfortheSusitnaHydroelectricProjectproposedbytheAlaskaPowerAu-thority.Thissurveyistosupplementborings,geologicmapping,andpreviousgeophysicalsurveysaccomplishedoverthepastseveralyears.LinelocationswereselectedbyAcresAmericanbasedonpreviousstudies.Linelengths,geophonespacingandfieldproceduresweredesignedtoinvestigatethenatureanddistributionofbedrockandoverburdenmaterials. Woodward·Clyde1-2R&Mpersonnellaidoutandbrushedallseismiclinesprovidedasurveyofrelativeelevationsandspacgeophoneandshotlocationswhichhadbeenflaggedseismictesting.1.2ScopeofWorkAtotalof27,800feetofseismiclinewasrunaseparatetraverses.Thirty-sixgeophonespreadstestedat122shotpoints.Thescopeofthefieldlimitedbyseveralfactorsincludingplannedtheprogram,weather,andlogistics.SeveraldeletedoralteredwiththeconcurrenceofAcresandfieldrepresentatives.AfewadditionallinesInparticular,linesplannedacrosstheriveratsiteswerenotconsideredfeasiblebecauseofthehighofflowatthattime.DeletedlinelocationsareFiguresI,3,and4.TheaccumulateddatawerereducedandinterpretheOrange,CaliforniaofficeofWoodward-Clydetants.PreviousseismicstudiesbyDames&Moore,1andbyShannonandWilson,1978,wereusedasforthepresentinterpretation.FieldobservationsandjudgmentofaWoodward-ClydeConsultantsIgeologist,waspartofthesurveycrew,wereincludedinthetation.Woodward·Clyde1-2R&Mpersonnellaidoutandbrushedallseismiclinesprovidedasurveyofrelativeelevationsandspacgeophoneandshotlocationswhichhadbeenflaggedseismictesting.1.2ScopeofWorkAtotalof27,800feetofseismiclinewasrunaseparatetraverses.Thirty-sixgeophonespreadstestedat122shotpoints.Thescopeofthefieldlimitedbyseveralfactorsincludingplannedtheprogram,weather,andlogistics.SeveraldeletedoralteredwiththeconcurrenceofAcresandfieldrepresentatives.AfewadditionallinesInparticular,linesplannedacrosstheriveratsiteswerenotconsideredfeasiblebecauseofthehighofflowatthattime.DeletedlinelocationsareFiguresI,3,and4.TheaccumulateddatawerereducedandinterpretheOrange,CaliforniaofficeofWoodward-Clydetants.PreviousseismicstudiesbyDames&Moore,1andbyShannonandWilson,1978,wereusedasforthepresentinterpretation.FieldobservationsandjudgmentofaWoodward-ClydeConsultantsIgeologist,waspartofthesurveycrew,wereincludedinthetation. Woodward-ClydeConsultants2.0DATAACQUISITIONThemajorityofgeophonespreadsforthissurveywerelilOOfeetlongwith100feetspacingbetweengeophones.Shorterspacingof10,20, 25,40,and50feetwereusedwhereterrainlimitedthelengthofaparticularspreadorwheregreaterdetailwasdesired.Fortraversesofmorethanonespread,endgeophonesonadjustmentspreadswerelocatedatthesamepoint.Formostspreads,shotswereplacedathalf-geophonespacingbeyondtheendgeophonesandatthemiddleoftheline.Explosivechargesofonepoundprovidedsufficientseismicenergyforlinesaslongas1100feet.Forabouthalfofthespreads,greaterdepthstobedrockrequiredshotsatgreateroffsetsfromtheendstoachievere-fractionfromdeeperinterfaces.Thelargestoffsetswere1,000feetfromtheendgeophone,resultinginashottofurthestgeophonedistanceof2,100feet.Usually,anexplosivechargeoftwopoundswasrequiredfortheselongershots.Forshortlinesexplosiveswerenotneces-saryandahammerandplatewereusedastheenergysource.ThesignatureofseismicwavesarrivingatgeophonesfromeachshotwasrecordedonageoMetries/NimbusmodelES-1210F12-channelstackingseismograph.Recordinggainswereselectedbytrialanderrorandfilterswereusedwhenbackgroundnoiselevelswerehighsuchasduringheavyrainorneartheriver.Thestackingfeatureoftheseismographemploysananalogidigitalconverterandan.internalmemorywhichstoreswavetracesfromeachgeophoneseparately.AdigitallanalogconverteristhenusedtodisplaythestoredtracesonanWoodward-ClydeConsultants2.0DATAACQUISITIONThemajorityofgeophonespreadsforthissurveywerelilOOfeetlongwith100feetspacingbetweengeophones.Shorterspacingof10,20, 25,40,and50feetwereusedwhereterrainlimitedthelengthofaparticularspreadorwheregreaterdetailwasdesired.Fortraversesofmorethanonespread,endgeophonesonadjustmentspreadswerelocatedatthesamepoint.Formostspreads,shotswereplacedathalf-geophonespacingbeyondtheendgeophonesandatthemiddleoftheline.Explosivechargesofonepoundprovidedsufficientseismicenergyforlinesaslongas1100feet.Forabouthalfofthespreads,greaterdepthstobedrockrequiredshotsatgreateroffsetsfromtheendstoachievere-fractionfromdeeperinterfaces.Thelargestoffsetswere1,000feetfromtheendgeophone,resultinginashottofurthestgeophonedistanceof2,100feet.Usually,anexplosivechargeoftwopoundswasrequiredfortheselongershots.Forshortlinesexplosiveswerenotneces-saryandahammerandplatewereusedastheenergysource.ThesignatureofseismicwavesarrivingatgeophonesfromeachshotwasrecordedonageoMetries/NimbusmodelES-1210F12-channelstackingseismograph.Recordinggainswereselectedbytrialanderrorandfilterswereusedwhenbackgroundnoiselevelswerehighsuchasduringheavyrainorneartheriver.Thestackingfeatureoftheseismographemploysananalogidigitalconverterandan.internalmemorywhichstoreswavetracesfromeachgeophoneseparately.Adigitallanalogconverteristhenusedtodisplaythestoredtracesonan Woodward-ClYde2-2oscilloscope.Theinputfrommultipleshotscanbesintothememoryandthesummedor"stacked"tracesplayedontheoscilloscope.Stackingofmultiple~tendstoenhancecoherentseismicsignalswhilefluenceofrandombackgroundnoiseisreducedstructiveinterference.StackingwasusedonthissuforshorterlineswheremUltiplehammerblowsprov£seismicenergyinsteadofexplosives.Theoverallamptudeofthesingleorstackedwavetracescanbeampliorreducedbytheseismographbeforeahardcopyofrecordisproducedbyanelectrostaticprinter.Foreachshot,afieldplotwasmadeofdistancetogeophoneversusthetimeofarrivalofthecompresseismicwavepickedfromtherecordedwavetrace.Thisdonetoassurethatsufficientinformationhadbeentainedforlaterinterpretation.Atthesametime,noweremadeastoterrainandexposedgeologicfeaturWoodward-ClYde2-2oscilloscope.Theinputfrommultipleshotscanbesintothememoryandthesummedor"stacked"tracesplayedontheoscilloscope.Stackingofmultiple~tendstoenhancecoherentseismicsignalswhilefluenceofrandombackgroundnoiseisreducedstructiveinterference.StackingwasusedonthissuforshorterlineswheremUltiplehammerblowsprov£seismicenergyinsteadofexplosives.Theoverallamptudeofthesingleorstackedwavetracescanbeampliorreducedbytheseismographbeforeahardcopyofrecordisproducedbyanelectrostaticprinter.Foreachshot,afieldplotwasmadeofdistancetogeophoneversusthetimeofarrivalofthecompresseismicwavepickedfromtherecordedwavetrace.Thisdonetoassurethatsufficientinformationhadbeentainedforlaterinterpretation.Atthesametime,noweremadeastoterrainandexposedgeologicfeatur Woodward·ClydeConsultants3.0DATAREDUCTIONPROCEDURESMethodsofreducingrawdatatovaluessuitableforinter-pretationweregenerallythosedescribedbyRedpath(1973).Thesegeneraltechniqueshavebeenaugmentedtosomedegreethroughourexperienceonpastprojects.First,fieldrecordswerereviewedandpicksofarrivaltimestabulated.Finaltime-distanceplotswerecon-structedtoreflectchangesinarrivaltimesfromthoseusedforfieldplots.TheseplotsareshowninAppendixA,FiguresAlthroughAIO.Apparentlayering,apparentseismicvelocities,andvariationsinarrivaltimesfromthoseexpectedfromaparticularlayer,wereusedtodirectsUbsequentdatareduction.Representative"true"velocitieswerecalculatedfromdifferencesinarrivaltimesateachgeophonefromshotsatoppositeendsoftheline.Wheresufficientdatawereavailable,delaytimeswerecalculatedbeneatheachgeo-phoneforeachlayer.Layerthicknesseswerethencal-culatedusingtherepresentativevelocity.Ifsufficientinformationwasnotavailableforrigorousdelay-timedetermination,approximationmethodswereusedtoestimatedepths.Inmanycases,alayerwhichwaswellexpressedononespread,orbelievedtobepresentfrompreviousinvesti-gations,wouldnotbeapparentonanadjacentspread.Inthesecases,ajudgmentwasmadeastothecontinuationofthelayer,asahiddenlayerorblindzone,beneaththespreadinquestiontoproducethemostgeologicallyreason-ableinterpretation.Thisoftenrequiredadjustmentofotherlayerthicknessestoaccountforthetotaldelaytime.Woodward·ClydeConsultants3.0DATAREDUCTIONPROCEDURESMethodsofreducingrawdatatovaluessuitableforinter-pretationweregenerallythosedescribedbyRedpath(1973).Thesegeneraltechniqueshavebeenaugmentedtosomedegreethroughourexperienceonpastprojects.First,fieldrecordswerereviewedandpicksofarrivaltimestabulated.Finaltime-distanceplotswerecon-structedtoreflectchangesinarrivaltimesfromthoseusedforfieldplots.TheseplotsareshowninAppendixA,FiguresAlthroughAIO.Apparentlayering,apparentseismicvelocities,andvariationsinarrivaltimesfromthoseexpectedfromaparticularlayer,wereusedtodirectsUbsequentdatareduction.Representative"true"velocitieswerecalculatedfromdifferencesinarrivaltimesateachgeophonefromshotsatoppositeendsoftheline.Wheresufficientdatawereavailable,delaytimeswerecalculatedbeneatheachgeo-phoneforeachlayer.Layerthicknesseswerethencal-culatedusingtherepresentativevelocity.Ifsufficientinformationwasnotavailableforrigorousdelay-timedetermination,approximationmethodswereusedtoestimatedepths.Inmanycases,alayerwhichwaswellexpressedononespread,orbelievedtobepresentfrompreviousinvesti-gations,wouldnotbeapparentonanadjacentspread.Inthesecases,ajudgmentwasmadeastothecontinuationofthelayer,asahiddenlayerorblindzone,beneaththespreadinquestiontoproducethemostgeologicallyreason-ableinterpretation.Thisoftenrequiredadjustmentofotherlayerthicknessestoaccountforthetotaldelaytime. Woodward-ClydeConsultants4.0DISCUSSIONOFRESULTSThelocationsoftheseismiclinesareshownonFigures1through4.ProfilesalongeachseismiclineillustratingsubsurfaceconditionsinterpretedfromthesurveyarepresentedasFigures5through14.Ontheseprofiles,layerthicknessesandsurfacetopographyareshownatatwofoldverticalexaggeration.Thisdistortionisrequiredtoillustratetheinterpretedthicknessofthin,shallowlayers.Linesofcontactbetweenlayersofdifferingvelocitiesvaryontheprofilesaccordingtotheconfidenceplacedontheinterpretation.Solidlinesrepresentawellcon-trolledcontactwithdepthsshownprobablywithin15percentofthetruetotaldepth.Dotsonthelinerepre-sentpointsofcontrolwherethedepthiswellconstrainedbythedata.Dashedlinesarelesswellcontrolled.Shortdashedlineswithnocontrol-pointdotsrepresentassumedcontactsbasedoninformationotherthanthatresultingdirectlyfromdatareduction.Thefollowingparagraphsdiscussthesettingofeachtraverse,theresultsofourinterpretation,andanomalousorambiguousconditionswhichbecameapparentduringdatareductionandsubsequentreviewofdatafromborings,testtrenches,andsurficialgeologicmapping.4.1Traverse80-1Thistraverseconsistsofsix1,100footgeophonespreadsandthree225footdetailspreads.AsshownonFigure1,thelineextendsnorthwardabout3300feetfromtherightabutmentdownstreamfrom'theproposedWatanaDam,andthennortheastwardanadditional3300feetacrosstheproposedspillwayalignment.Topographyisrelativelysteepatbothendsofthelineandrelativelygentleelsewhere.Woodward-ClydeConsultants4.0DISCUSSIONOFRESULTSThelocationsoftheseismiclinesareshownonFigures1through4.ProfilesalongeachseismiclineillustratingsubsurfaceconditionsinterpretedfromthesurveyarepresentedasFigures5through14.Ontheseprofiles,layerthicknessesandsurfacetopographyareshownatatwofoldverticalexaggeration.Thisdistortionisrequiredtoillustratetheinterpretedthicknessofthin,shallowlayers.Linesofcontactbetweenlayersofdifferingvelocitiesvaryontheprofilesaccordingtotheconfidenceplacedontheinterpretation.Solidlinesrepresentawellcon-trolledcontactwithdepthsshownprobablywithin15percentofthetruetotaldepth.Dotsonthelinerepre-sentpointsofcontrolwherethedepthiswellconstrainedbythedata.Dashedlinesarelesswellcontrolled.Shortdashedlineswithnocontrol-pointdotsrepresentassumedcontactsbasedoninformationotherthanthatresultingdirectlyfromdatareduction.Thefollowingparagraphsdiscussthesettingofeachtraverse,theresultsofourinterpretation,andanomalousorambiguousconditionswhichbecameapparentduringdatareductionandsubsequentreviewofdatafromborings,testtrenches,andsurficialgeologicmapping.4.1Traverse80-1Thistraverseconsistsofsix1,100footgeophonespreadsandthree225footdetailspreads.AsshownonFigure1,thelineextendsnorthwardabout3300feetfromtherightabutmentdownstreamfrom'theproposedWatanaDam,andthennortheastwardanadditional3300feetacrosstheproposedspillwayalignment.Topographyisrelativelysteepatbothendsofthelineandrelativelygentleelsewhere. Woodward-Clyde4-2Athick13,000fpslayerispresentnearthecenteroftraverse.Itprobablyrepresentsweathereddioritebutmaybeadifferentlithologysuchasvolcanicwhichhasbeenmappedinthevicinity.Anotheristhatthe13,000fpsmaterialispartofatabularfracturedoralteredzonewhichextendsfromintersectionoftraverses80-2andSW2wherematerialthesamevelocityhasbeendetected.Althoughthe13fpszoneisshowntobeunderlainbyhighervelocityialonFigure5,thehighervelocitymaterialmaybetotheside.Additionalrefractionlinesorwillberequiredtoresolvethispossibility.Theinterpretedprofilefortraverse80-1isFigure5.Bedrockvelocitiesalongthelineberelativelyuniform,rangingfrom14,500fpssecond)to16,000fps.Intermediatelayervelocitiesfrom5,250fpsto13,000fpsandshallowlayervelocfrom1,300fpsto3,600fps.Thelowervelocitiessentloosesurficialmaterialsandpossibly,fine-grainedlakedepositssuchasencounteredinDR-6(thelocationofboringsdesignatedDRareu.S.ArmyCorpsofEngineers[1979J).Atthesouthernendoftheline,a50-foot-thick10,000fpsmaterialprobablyrepresentsweatheredNearthenorthernendofspread80-lE,thislayertoover100feetandmayrepresentananomalythatshownonShannonandWilson(1978),line2(SW2thesoutheast.WeunderstandthataprominentgougeisexposedonthesteepslopesneartheanomalySW2.Theanomalyonline80-lEmayrepresentaationofthatzoneinwhichcase,itstrendwouldapproximatelyN40W.Woodward-Clyde4-2Athick13,000fpslayerispresentnearthecenteroftraverse.Itprobablyrepresentsweathereddioritebutmaybeadifferentlithologysuchasvolcanicwhichhasbeenmappedinthevicinity.Anotheristhatthe13,000fpsmaterialispartofatabularfracturedoralteredzonewhichextendsfromintersectionoftraverses80-2andSW2wherematerialthesamevelocityhasbeendetected.Althoughthe13fpszoneisshowntobeunderlainbyhighervelocityialonFigure5,thehighervelocitymaterialmaybetotheside.Additionalrefractionlinesorwillberequiredtoresolvethispossibility.Theinterpretedprofilefortraverse80-1isFigure5.Bedrockvelocitiesalongthelineberelativelyuniform,rangingfrom14,500fpssecond)to16,000fps.Intermediatelayervelocitiesfrom5,250fpsto13,000fpsandshallowlayervelocfrom1,300fpsto3,600fps.Thelowervelocitiessentloosesurficialmaterialsandpossibly,fine-grainedlakedepositssuchasencounteredinDR-6(thelocationofboringsdesignatedDRareu.S.ArmyCorpsofEngineers[1979J).Atthesouthernendoftheline,a50-foot-thick10,000fpsmaterialprobablyrepresentsweatheredNearthenorthernendofspread80-lE,thislayertoover100feetandmayrepresentananomalythatshownonShannonandWilson(1978),line2(SW2thesoutheast.WeunderstandthataprominentgougeisexposedonthesteepslopesneartheanomalySW2.Theanomalyonline80-lEmayrepresentaationofthatzoneinwhichcase,itstrendwouldapproximatelyN40W. Thechannelappearstobethesameasthatdocumentedbythe1975DamesandMooresurveyandonlineSW3.Itisalsowellexpressedonlines80-2and80-6whicharedis-cussedinlaterparagraphs.ThesouthwesternedgeofthechannelandtheapparentthalwegareshownbydashedlinesonFigure1.Theeasternedgeofthechannelappearstobeimmediatelynorthofline80-7andappearstobeexpressedatthenorthernendof80-8.4.2Traverse80-2Traverse80-2consistsoffive1100footspreadsontherightabutmentextendingfromnearthe toeoftheproposedWatanaDam,northwardacrosstheproposedspillway.ItroughlyparallelsTraverse80-1between1,800and2,200feettotheeastandsoutheast(Figure1).Thetopographyisrelativelysteepatthesouthernendandmoderatetogentleelsewhere.Theinterpretedprofilefortraverse80-2isshownonFigure6.Thethinirregularedgesoftherelictchanneldiscussedinpreviousreportsareapparentonspreads80-lAand80-lB.Channelfillbeneaththeselines,whichisprobablyboul-deryglacialdetritus,rangesfrom7000to9000fps.Theconfigurationofthechannelbeneathline80-1BisprobablymuchmorecomplicatedthanshownonFigure5.Theprofileshowsdepthswhicharebasedonapproximationreductionmethodsbecauseofthecomplexityofthetime-distanceplot(FigureA-I,AppendixA)forwhichnoreasonablemathe-maticalsolutioncouldbefound.Depthtobedrockisshowntobemorethan150feetbutisprobablyhighlyirregularandmuchshallowerespeciallynearthecenteroftheline.BoringDR-6justsoutheastofthecenterofthelineencounteredbedrockatadepthof65feet.Woodward-ClydeConsultants4-3Thechannelappearstobethesameasthatdocumentedbythe1975DamesandMooresurveyandonlineSW3.Itisalsowellexpressedonlines80-2and80-6whicharedis-cussedinlaterparagraphs.ThesouthwesternedgeofthechannelandtheapparentthalwegareshownbydashedlinesonFigure1.Theeasternedgeofthechannelappearstobeimmediatelynorthofline80-7andappearstobeexpressedatthenorthernendof80-8.4.2Traverse80-2Traverse80-2consistsoffive1100footspreadsontherightabutmentextendingfromnearthe toeoftheproposedWatanaDam,northwardacrosstheproposedspillway.ItroughlyparallelsTraverse80-1between1,800and2,200feettotheeastandsoutheast(Figure1).Thetopographyisrelativelysteepatthesouthernendandmoderatetogentleelsewhere.Theinterpretedprofilefortraverse80-2isshownonFigure6.Thethinirregularedgesoftherelictchanneldiscussedinpreviousreportsareapparentonspreads80-lAand80-lB.Channelfillbeneaththeselines,whichisprobablyboul-deryglacialdetritus,rangesfrom7000to9000fps.Theconfigurationofthechannelbeneathline80-1BisprobablymuchmorecomplicatedthanshownonFigure5.Theprofileshowsdepthswhicharebasedonapproximationreductionmethodsbecauseofthecomplexityofthetime-distanceplot(FigureA-I,AppendixA)forwhichnoreasonablemathe-maticalsolutioncouldbefound.Depthtobedrockisshowntobemorethan150feetbutisprobablyhighlyirregularandmuchshallowerespeciallynearthecenteroftheline.BoringDR-6justsoutheastofthecenterofthelineencounteredbedrockatadepthof65feet.Woodward-ClydeConsultants4-3 4-4Woodward-ClydeBedrockvelocitiesaresimilartothoseof80-1from14,000to17,000fps.Intermediatelayersthick13,000fpslayersbeneaththesouthernchannelfillatthenorthernendofthelineranging6,000to8,000fps.Nearsurfacevelocitylayersfrom1250to2800fps.Thelowestbedrockvelocityencounteredonthetraverbeneathspread80-2Dandunderliesananomalouslyportionoftherelictchannel.BoringsDR-18andnorthwestandsoutheastofthespreadrespectively,thedepthtobedrockshownontheprofileandindicatetherockinthatareaishighlyfractureddioriteapparentclaygougezones.ThislowvelocityzonerepresentacontinuationofashearzoneknownasFinsIIexposedadjacenttotherivertothesoutheast.trendofthispossiblecontinuationprojectsnortheasternendofspread80-1Bwhich,asprediscussed,producedahighlyirregularseismicreThe13,000fpslayeratthesouthernendoftheappearstobeweatheredbedrockbasedonthelocationofthelayer.LineSW2whichcrossesthenearitssouthernend(seeFigure1),alsoshowsthefpslayerandthesamedepthtobedrockatthesection.A6,000fpslayershownonSW2wasnoton80-2.The13,000fpslayerisshownonSW2asuousforabout2400feetparalleltotheriver.ofthematerialshownontheprofileof80-2(FigurenotinconsistentwiththesuggestionbyShannonand(1978)thatitmaybeinvolvedinlandsliding.4-4Woodward-ClydeBedrockvelocitiesaresimilartothoseof80-1from14,000to17,000fps.Intermediatelayersthick13,000fpslayersbeneaththesouthernchannelfillatthenorthernendofthelineranging6,000to8,000fps.Nearsurfacevelocitylayersfrom1250to2800fps.Thelowestbedrockvelocityencounteredonthetraverbeneathspread80-2Dandunderliesananomalouslyportionoftherelictchannel.BoringsDR-18andnorthwestandsoutheastofthespreadrespectively,thedepthtobedrockshownontheprofileandindicatetherockinthatareaishighlyfractureddioriteapparentclaygougezones.ThislowvelocityzonerepresentacontinuationofashearzoneknownasFinsIIexposedadjacenttotherivertothesoutheast.trendofthispossiblecontinuationprojectsnortheasternendofspread80-1Bwhich,asprediscussed,producedahighlyirregularseismicreThe13,000fpslayeratthesouthernendoftheappearstobeweatheredbedrockbasedonthelocationofthelayer.LineSW2whichcrossesthenearitssouthernend(seeFigure1),alsoshowsthefpslayerandthesamedepthtobedrockatthesection.A6,000fpslayershownonSW2wasnoton80-2.The13,000fpslayerisshownonSW2asuousforabout2400feetparalleltotheriver.ofthematerialshownontheprofileof80-2(FigurenotinconsistentwiththesuggestionbyShannonand(1978)thatitmaybeinvolvedinlandsliding. Woodward·ClydeConsultants4-5Thechannelfillatthenortheasternendofthelineconsistsoftwodistinctvelocityzonessimilartothosedetectedontraverse80-1.Thesouthernportionofthefillrangesfrom6,500to8,000fps.BoringDR-20appearstohaveencounteredthismaterialsoutheastofthelinewhereitconsistsofsaturatedsandygravelswithfinergrainedinterlayers.BoringDR-18,northwestoftheline,appearstohavepenetratedlowervelocitymaterialdetectedatthenortheasternrnostendofthetraverse.Thismater-ial,rangingfrom5,400to6,000fps,appearstobemostlysiltysandsandsandysiltswithsomeclayandscatteredgravelsandboulders.SurficialmaterialsnearboringsDR-18andDR-20appeartobesandysilts.Seismicvelocitiesofthesurfacelayerneartheboringsaregenerallylessthan2,000fps.Velocitiestothesouthalongthetraverserangeareupto2,800fpsandinterpretedasrepresentingmoregravellyorbettercompactedsedimentsthanthoseneartheborings.4.3Traverse80-3Traverse80-3wasrunontheruggedsteepslopesoftheabutmentsacrosstheproposedupstreamportionofthedarn.Theprofile,shownasFigure7,isbasedonone1,000footspreadontheleftabutmentandthreespreads,1,000feet,265feet,and300feetrespectively,ontherightabut-ment.Aproposedsegmentofthetraverseacrosstheriverwasnotconsideredfeasibleatthetimeofthesurveyduetohighwaterlevels,andwasthereforenotperformed.Bedrockisshallowonbothabutments.Onthesouthside,bedrockappearstobeofauniform15,000fpsvelocity.Thetopofthesouthernslopeisunderlainby5,200fpsmaterialwhichmayreflectfrozensoilexposedinashallowtrenchinthatarea.Fartherdowntheslope,surficialWoodward·ClydeConsultants4-5Thechannelfillatthenortheasternendofthelineconsistsoftwodistinctvelocityzonessimilartothosedetectedontraverse80-1.Thesouthernportionofthefillrangesfrom6,500to8,000fps.BoringDR-20appearstohaveencounteredthismaterialsoutheastofthelinewhereitconsistsofsaturatedsandygravelswithfinergrainedinterlayers.BoringDR-18,northwestoftheline,appearstohavepenetratedlowervelocitymaterialdetectedatthenortheasternrnostendofthetraverse.Thismater-ial,rangingfrom5,400to6,000fps,appearstobemostlysiltysandsandsandysiltswithsomeclayandscatteredgravelsandboulders.SurficialmaterialsnearboringsDR-18andDR-20appeartobesandysilts.Seismicvelocitiesofthesurfacelayerneartheboringsaregenerallylessthan2,000fps.Velocitiestothesouthalongthetraverserangeareupto2,800fpsandinterpretedasrepresentingmoregravellyorbettercompactedsedimentsthanthoseneartheborings.4.3Traverse80-3Traverse80-3wasrunontheruggedsteepslopesoftheabutmentsacrosstheproposedupstreamportionofthedarn.Theprofile,shownasFigure7,isbasedonone1,000footspreadontheleftabutmentandthreespreads,1,000feet,265feet,and300feetrespectively,ontherightabut-ment.Aproposedsegmentofthetraverseacrosstheriverwasnotconsideredfeasibleatthetimeofthesurveyduetohighwaterlevels,andwasthereforenotperformed.Bedrockisshallowonbothabutments.Onthesouthside,bedrockappearstobeofauniform15,000fpsvelocity.Thetopofthesouthernslopeisunderlainby5,200fpsmaterialwhichmayreflectfrozensoilexposedinashallowtrenchinthatarea.Fartherdowntheslope,surficial 4-6velocitiesdroptoabout2,200fps.Thisappearsveryloosetalusontheslope,atleastatthecentepoint.Thebaseoftheslopeisunderlainby7ImaterialwhichappearstobehighlyweatheredRepresentativebedrockvelocitiesonthenorthsidefromabout15,000fpsnearthetoptoashighaslowerontheslope.SurficialmaterialontheisgenerallyaboutlS-foot-thickandbetween2,200fpsontheupperslope.Surficialthinnerandlowerinvelocitynearthebottom.upperslopeiscoveredwithloosetalus.Lines80-4and80-5whichwereplannedacrossthetheproposeddamaxisandbeneaththeupstreamtoe,spectively,werenotrunduetohighwaterconditions.maybepossibletocompletetheselinesaftertherifrozen.Geophonespread80-3Dwasrunparalleltotheriverthenorthbank.Thislinedetecteda7,000fpsSO-foot-thickwhichprobablyprojectsbeneaththeThislayerwasnotapparentonspreadofthenorthslope.Itappearsasif80-3Cwasrunresistantbedrockspurandthatthe7,000fpspresenttoeachsideofthespurnearthebase0slope.4.4Traverse80-6Thistraverseconsistedofone1,100footspreadcoincidentshorter600footdetailspreadacrossanentlyanomaloustopographicdepressionapproximately4feetupstreamfromtheproposeddamaxisonthenorthoftheriver.TheprofilepresentedasFigure8,showSedgeoftherelictchanneldiscussedinconjunctionTraverses80-1and80-2.4-6velocitiesdroptoabout2,200fps.Thisappearsveryloosetalusontheslope,atleastatthecentepoint.Thebaseoftheslopeisunderlainby7ImaterialwhichappearstobehighlyweatheredRepresentativebedrockvelocitiesonthenorthsidefromabout15,000fpsnearthetoptoashighaslowerontheslope.SurficialmaterialontheisgenerallyaboutlS-foot-thickandbetween2,200fpsontheupperslope.Surficialthinnerandlowerinvelocitynearthebottom.upperslopeiscoveredwithloosetalus.Lines80-4and80-5whichwereplannedacrossthetheproposeddamaxisandbeneaththeupstreamtoe,spectively,werenotrunduetohighwaterconditions.maybepossibletocompletetheselinesaftertherifrozen.Geophonespread80-3Dwasrunparalleltotheriverthenorthbank.Thislinedetecteda7,000fpsSO-foot-thickwhichprobablyprojectsbeneaththeThislayerwasnotapparentonspreadofthenorthslope.Itappearsasif80-3Cwasrunresistantbedrockspurandthatthe7,000fpspresenttoeachsideofthespurnearthebase0slope.4.4Traverse80-6Thistraverseconsistedofone1,100footspreadcoincidentshorter600footdetailspreadacrossanentlyanomaloustopographicdepressionapproximately4feetupstreamfromtheproposeddamaxisonthenorthoftheriver.TheprofilepresentedasFigure8,showSedgeoftherelictchanneldiscussedinconjunctionTraverses80-1and80-2. Bedrockvelocityrangesfrom11,500fpsnearthewesternendofthelineto20,000fpsbeneaththechannel.Thechannelappearstobefilledwith7,000fpsmaterialwhichalsoisthinlydistributedbeneaththewesternportionoftheline.Overlyingthisisalayerof2,300fpsmaterialand,inpart,athinsurfacelayerof1,100fpsmaterial.'TheShannonandWilson,1978,interpretationofnearbylineSW-3showsashallowerchannelcontaining4,500fpsmater-ialwithinthelargerrelictchannelfeature.Thislayercanalsobeinterpretedtounderlie80-6basedonthetime-distanceplot(seeAppendixA,FigureA-5).However,thepresentinterpretati.onofaslightthickeningofthe2,300fpslayerisalsoreasonablyconsistentwiththedata.Thenearestboringstotraverse80-6aremorethan1,000feetaway.Thechannelfillmaterialisthereforeinter-pretedtobesimilartothatinterpretedforlineSW-3andfortraverses80-1and80-2aspreviouslydiscussed.The7,000fpsvelocityofthefillismoreuniformthanseenelsewhereandprobablyrepresentsanaveragingofbothhigherandlowervelocitymaterialssuchassaturatedalluviumandglacialdetritus.Woodward-ClydeConsultants4-7Theincreaseinbedrockvelocityacrossthetraversefromwesttoeastmayberelatedtoeffectsof"TheFins"shearzonewhichisexposedabout700feetsouthwestoftheendofspread80-6A.Thisincreaseinbedrockvelocityeastoftheshearzoneisalsoexpressedonthe1975seismiclineandonSW-3whicharebothtothenorthwestof80-06.Progressivelyhighervelocityzonesonthosethreetrav-ersesareroughlycorrelatibleandappeartoformbandsgenerallyparalleltotheshearzone.Bedrockvelocityrangesfrom11,500fpsnearthewesternendofthelineto20,000fpsbeneaththechannel.Thechannelappearstobefilledwith7,000fpsmaterialwhichalsoisthinlydistributedbeneaththewesternportionoftheline.Overlyingthisisalayerof2,300fpsmaterialand,inpart,athinsurfacelayerof1,100fpsmaterial.'TheShannonandWilson,1978,interpretationofnearbylineSW-3showsashallowerchannelcontaining4,500fpsmater-ialwithinthelargerrelictchannelfeature.Thislayercanalsobeinterpretedtounderlie80-6basedonthetime-distanceplot(seeAppendixA,FigureA-5).However,thepresentinterpretati.onofaslightthickeningofthe2,300fpslayerisalsoreasonablyconsistentwiththedata.Thenearestboringstotraverse80-6aremorethan1,000feetaway.Thechannelfillmaterialisthereforeinter-pretedtobesimilartothatinterpretedforlineSW-3andfortraverses80-1and80-2aspreviouslydiscussed.The7,000fpsvelocityofthefillismoreuniformthanseenelsewhereandprobablyrepresentsanaveragingofbothhigherandlowervelocitymaterialssuchassaturatedalluviumandglacialdetritus.Woodward-ClydeConsultants4-7Theincreaseinbedrockvelocityacrossthetraversefromwesttoeastmayberelatedtoeffectsof"TheFins"shearzonewhichisexposedabout700feetsouthwestoftheendofspread80-6A.Thisincreaseinbedrockvelocityeastoftheshearzoneisalsoexpressedonthe1975seismiclineandonSW-3whicharebothtothenorthwestof80-06.Progressivelyhighervelocityzonesonthosethreetrav-ersesareroughlycorrelatibleandappeartoformbandsgenerallyparalleltotheshearzone. Woodward·Clyde4-8Surficialmaterialsareprobablysimilartothoseatbutlesssaturated.The2,300fpslayermayalsograined.Thelowvelocityofthe1,100fpslayeritisverylooseandprobablydry.4.5Traverse80-7Traverse80-7consistsoftwo1,100footspreadsnorth-southacrossthewesternendofBorrowArealineisshownonbothFigures1and2.risesgentlytothenorthalongtheline.velocityanalysisindicatedthatbedrockwas15,500fpseventhoughthetime-distanceplotshighervalues.Thedifferencesareattributedtoofthebedrocksurfaceandnottolateralchanges.interpretedprofilefortraverse80-7isshownon9.Thelineappearstobelocatedoverthenortheasternoftherelictchannel.Channelfillmaterialranges7,400to9,000fps.Itisgenerallyaboutbutisshallowernearthenorthend.Atthemaydeepentoasmuchas400feet.LineSW3,whichspread80-7Anearitsnorthernend,showsasimilarandvelocityforbedrockatthatpoint.Thethechannelfillisgivenas7,000fpsonSW3.BoringDR-26,whichislocatedwestofthenorthline80-7B,encounteredsiltysand,clayeysilt,andsandysiltwithbouldersatdepthsequivalentchannelfillmaterialinterpretedfromseismicThevelocityofsurfacematerialsalongthelinebeuniformly1,850fps.SeveralexposuresalongindicatethattheupperportionofthisunitconsiWoodward·Clyde4-8Surficialmaterialsareprobablysimilartothoseatbutlesssaturated.The2,300fpslayermayalsograined.Thelowvelocityofthe1,100fpslayeritisverylooseandprobablydry.4.5Traverse80-7Traverse80-7consistsoftwo1,100footspreadsnorth-southacrossthewesternendofBorrowArealineisshownonbothFigures1and2.risesgentlytothenorthalongtheline.velocityanalysisindicatedthatbedrockwas15,500fpseventhoughthetime-distanceplotshighervalues.Thedifferencesareattributedtoofthebedrocksurfaceandnottolateralchanges.interpretedprofilefortraverse80-7isshownon9.Thelineappearstobelocatedoverthenortheasternoftherelictchannel.Channelfillmaterialranges7,400to9,000fps.Itisgenerallyaboutbutisshallowernearthenorthend.Atthemaydeepentoasmuchas400feet.LineSW3,whichspread80-7Anearitsnorthernend,showsasimilarandvelocityforbedrockatthatpoint.Thethechannelfillisgivenas7,000fpsonSW3.BoringDR-26,whichislocatedwestofthenorthline80-7B,encounteredsiltysand,clayeysilt,andsandysiltwithbouldersatdepthsequivalentchannelfillmaterialinterpretedfromseismicThevelocityofsurfacematerialsalongthelinebeuniformly1,850fps.Severalexposuresalongindicatethattheupperportionofthisunitconsi boulderaccumulationswithlittleornomatrix.Boringsandtrenchesinthevicinityhaveencounteredgravellysandsbelowtheimmediatesurface.4.6Traverse80-8Thetwo1,000footlinesthatcompriseTraverse80-8extendsouthwardfromtheendoflineSW5attheedgeofBorrowAreaDnearDeadmanCreekacrossproposedQuarrySourceBasshownonFigure2.The-linecrossesmoderateandthenverysteeptopographysouthward.Woodward-ClydeConsultants4-9Itdoesnotappearlikelythathardrockisnearenoughtothesurfacetoprovideanadequatequarrysourcealongthelineoftheprofile.Wehavenoinformationastopossibleoutcropselsewherewithinthedesignatedarea.Theinter-mediatevelocitylayersappeartobesimilartothosefillingtherelictchanneltothewestaspreviouslydis-cussed.The5,000to7,000fpslayerprobablyrepresentsaThehighestbedrockvelocityisatthemiddleofthetraversewheretherockapparentlyformsaburiedresistantridge.Thebedrocksurfacemaybeasdeepas500feetatapointbelowthemiddleofspread80-8A.AtthenorthendofthelinebedrockdoesnotappeartobeasdeepasshowninShannonandWilson,1978,lineSW5.However,thislocationisneartheendofbothlinesandadditionalcontrolislacking.FourcontinuouslayersareinterpretedontheprofilepresentedasFigure10.Theseincludeashallow1,350to1,600fpslayerandintermediatevelocitylayersof5,000to7,000fpsand8,400to9,000fps.Bedrockappearstochangelaterallyfrom12,500fpsnearthenorthendto23,500fpsatthecenter,andto16,500fpsnearthesouthend.boulderaccumulationswithlittleornomatrix.Boringsandtrenchesinthevicinityhaveencounteredgravellysandsbelowtheimmediatesurface.4.6Traverse80-8Thetwo1,000footlinesthatcompriseTraverse80-8extendsouthwardfromtheendoflineSW5attheedgeofBorrowAreaDnearDeadmanCreekacrossproposedQuarrySourceBasshownonFigure2.The-linecrossesmoderateandthenverysteeptopographysouthward.Woodward-ClydeConsultants4-9Itdoesnotappearlikelythathardrockisnearenoughtothesurfacetoprovideanadequatequarrysourcealongthelineoftheprofile.Wehavenoinformationastopossibleoutcropselsewherewithinthedesignatedarea.Theinter-mediatevelocitylayersappeartobesimilartothosefillingtherelictchanneltothewestaspreviouslydis-cussed.The5,000to7,000fpslayerprobablyrepresentsaThehighestbedrockvelocityisatthemiddleofthetraversewheretherockapparentlyformsaburiedresistantridge.Thebedrocksurfacemaybeasdeepas500feetatapointbelowthemiddleofspread80-8A.AtthenorthendofthelinebedrockdoesnotappeartobeasdeepasshowninShannonandWilson,1978,lineSW5.However,thislocationisneartheendofbothlinesandadditionalcontrolislacking.FourcontinuouslayersareinterpretedontheprofilepresentedasFigure10.Theseincludeashallow1,350to1,600fpslayerandintermediatevelocitylayersof5,000to7,000fpsand8,400to9,000fps.Bedrockappearstochangelaterallyfrom12,500fpsnearthenorthendto23,500fpsatthecenter,andto16,500fpsnearthesouthend. Woodward-ClYde4-10Anumberoftestpitsinthevicinityofindicatethattheshallowmaterials1,350tosurfacelayersarehighlyvariable.Mostpitsloose,unsaturatedsiltygravelysands.youngerepisodeofchannelingandfillingsimilartoshownontraverses80-1and80-2.Bothintermediateprobablyconsistofsaturatedalluvialdepositsandderyglacialdetritus.4.7Traverse80-9Traverse80-9wasasingle1,100-foot-lineattheendofBorrowAreaEextendingupslopefromSW14.Thepresentinterpretation,shownoningoodagreementwiththatline.4.8Traverse80-11ThistraversewasrunnorthandwestofTsusenaCreektheeasternendofBorrowAreaE.Thealignmentchangedfromeastofthecreekwhensurfacereconnaisshowedthatareatobeunderlainprimarilywithglacialdeposits.Arelativelyuniformmantleoflowvelocitymaterial(to1,800fps)appearstocovertheslope30to50deep.Shallowexposuressuggestthatthe1,100terialatthebaseofthehillisaloosegravel.onthehill,thesurfaceismantledbyorganicAhighervelocitylayer(6,000to7,250fps)underlsurficialdepositsandthickensnorthward.ocitiesaresimilartothoseofglacialdetritusfoundelsewhere.Bedrockwithanrnatevelocityof15,000fps,isabout100feetbelowsurfaceatthebaseofthehillandmaybeasdeepfeetatthenorthendoftheline.Woodward-ClYde4-10Anumberoftestpitsinthevicinityofindicatethattheshallowmaterials1,350tosurfacelayersarehighlyvariable.Mostpitsloose,unsaturatedsiltygravelysands.youngerepisodeofchannelingandfillingsimilartoshownontraverses80-1and80-2.Bothintermediateprobablyconsistofsaturatedalluvialdepositsandderyglacialdetritus.4.7Traverse80-9Traverse80-9wasasingle1,100-foot-lineattheendofBorrowAreaEextendingupslopefromSW14.Thepresentinterpretation,shownoningoodagreementwiththatline.4.8Traverse80-11ThistraversewasrunnorthandwestofTsusenaCreektheeasternendofBorrowAreaE.Thealignmentchangedfromeastofthecreekwhensurfacereconnaisshowedthatareatobeunderlainprimarilywithglacialdeposits.Arelativelyuniformmantleoflowvelocitymaterial(to1,800fps)appearstocovertheslope30to50deep.Shallowexposuressuggestthatthe1,100terialatthebaseofthehillisaloosegravel.onthehill,thesurfaceismantledbyorganicAhighervelocitylayer(6,000to7,250fps)underlsurficialdepositsandthickensnorthward.ocitiesaresimilartothoseofglacialdetritusfoundelsewhere.Bedrockwithanrnatevelocityof15,000fps,isabout100feetbelowsurfaceatthebaseofthehillandmaybeasdeepfeetatthenorthendoftheline. Woodward·ClydeConsultants4-11Spread80-llAwasrunfromthebankofTsusenaCreeknorthward1,100feetacrossgentletopographytothebaseofahill(Figure3).Asecond1,100footspread,80-llB,wasrunfromthecenterofthefirstinanortheasterlydirection.Thislinehdnotbeenpreviouslystakedorbrushedandwhensurveyedlater,wasfoundtobendtothenorthasshownonFigure3.Twoshorterdetailspreads(80-llCand80-llD)werealsorunnearthemiddleofspread80-llA.Onthesouthernendofthetraverse80-llA,a2,800fpslayerofloosesurficialdepositsappearstobeabout30feetthickandthinstothenorth.Thisappearstobeunderlainbya11,000fpsweatheredbedrocklayerabout100feetthickwhichalsothinstothenorth.Bedrockvelocitybeneaththeareaisbetween16,000and17,000fps.Inthenorthernpartoftheareathe11,000fpslayerwedgesoutbeneathanapparentrelictchannelfilledwith5,000fpsmaterialwhichmaybeloosesaturatedsandsandgravels.A7,000fpsintermediatezoneatthenorthendofspread80-llAisnotapparenton80-llB.Instead,thenorthernpartof80-llBshowsshallowbedrockbeneathabout20feetof1,400fpssurficialdeposits.The7,000fpsmaterialmaybesimilartotherelictchannelfilldetectedonlinespreviouslydiscussed.4.9Traverses80-12, 80-13,and80-15ThesethreetraverseswererunacrossasmalllakeandontheadjacentslopesabovetheleftabutmentoftheproposedDevilCanyonDarnasshownonFigure4.Traverse80-12consistedofa250·foothydrophonespreadacrossthewesternpartofthelakeandtwo500footgeophonespreadsWoodward·ClydeConsultants4-11Spread80-llAwasrunfromthebankofTsusenaCreeknorthward1,100feetacrossgentletopographytothebaseofahill(Figure3).Asecond1,100footspread,80-llB,wasrunfromthecenterofthefirstinanortheasterlydirection.Thislinehdnotbeenpreviouslystakedorbrushedandwhensurveyedlater,wasfoundtobendtothenorthasshownonFigure3.Twoshorterdetailspreads(80-llCand80-llD)werealsorunnearthemiddleofspread80-llA.Onthesouthernendofthetraverse80-llA,a2,800fpslayerofloosesurficialdepositsappearstobeabout30feetthickandthinstothenorth.Thisappearstobeunderlainbya11,000fpsweatheredbedrocklayerabout100feetthickwhichalsothinstothenorth.Bedrockvelocitybeneaththeareaisbetween16,000and17,000fps.Inthenorthernpartoftheareathe11,000fpslayerwedgesoutbeneathanapparentrelictchannelfilledwith5,000fpsmaterialwhichmaybeloosesaturatedsandsandgravels.A7,000fpsintermediatezoneatthenorthendofspread80-llAisnotapparenton80-llB.Instead,thenorthernpartof80-llBshowsshallowbedrockbeneathabout20feetof1,400fpssurficialdeposits.The7,000fpsmaterialmaybesimilartotherelictchannelfilldetectedonlinespreviouslydiscussed.4.9Traverses80-12, 80-13,and80-15ThesethreetraverseswererunacrossasmalllakeandontheadjacentslopesabovetheleftabutmentoftheproposedDevilCanyonDarnasshownonFigure4.Traverse80-12consistedofa250·foothydrophonespreadacrossthewesternpartofthelakeandtwo500footgeophonespreads Woodward·CIYd4-12upsteepadjacentslopestothenorthandsouth.80-13consistedofasimilarcombinationacrossthepartofthelake.Traverse15wasasinglehydline,500footlong,extendingnorthwesttoSoutacrossthelake.Thepossibilityofashearzonetrendingapproxeast-westbeneaththel,akewassuggestedbyShannonWilson(1978)basedonresultsoflineSW-17,whichallels80-12,400feettothewest.Onthatline,Alayerofapproximately5,000fpsunderliesthe1allthreeprofiles.Thisisprobablysaturatedsedimentswhichmaybeasdeepas50feetneartheofthelakeasshownonprofile80-15.Time-distancefromallthreespreadsrunacrossthelakeareveryregularandsUbjecttoalternativeinterpretations.fromspread80-15appeartoindicatethathibedrockdirectlyunderliesthesaturatedsedimentsmostofthelake.Theothertwoprofiles,however,catethatonlyweatheredrockispresentbeneathpartthearea.TheprofilesshownonFigures13and14indicatebedrockvelocitiesofbetween16,800andProfile80-12showsadistinctintermediatelayertheslopesofbetween7,000and10,000fps.Thishighlyweatheredbedrockorglacialdeposits.intermediatelayerbeneaththerelativelyflatnorth80-13,probablyindicateswatertableinotherwisvelocitysediments.SurficialdepositsontheS.vw~;~generallybetween1,400and2,200fps.The4,000indicatedbeneaththenorth-facingslopeonline8probablyrepresentsparticallyfrozenground.Woodward·CIYd4-12upsteepadjacentslopestothenorthandsouth.80-13consistedofasimilarcombinationacrossthepartofthelake.Traverse15wasasinglehydline,500footlong,extendingnorthwesttoSoutacrossthelake.Thepossibilityofashearzonetrendingapproxeast-westbeneaththel,akewassuggestedbyShannonWilson(1978)basedonresultsoflineSW-17,whichallels80-12,400feettothewest.Onthatline,Alayerofapproximately5,000fpsunderliesthe1allthreeprofiles.Thisisprobablysaturatedsedimentswhichmaybeasdeepas50feetneartheofthelakeasshownonprofile80-15.Time-distancefromallthreespreadsrunacrossthelakeareveryregularandsUbjecttoalternativeinterpretations.fromspread80-15appeartoindicatethathibedrockdirectlyunderliesthesaturatedsedimentsmostofthelake.Theothertwoprofiles,however,catethatonlyweatheredrockispresentbeneathpartthearea.TheprofilesshownonFigures13and14indicatebedrockvelocitiesofbetween16,800andProfile80-12showsadistinctintermediatelayertheslopesofbetween7,000and10,000fps.Thishighlyweatheredbedrockorglacialdeposits.intermediatelayerbeneaththerelativelyflatnorth80-13,probablyindicateswatertableinotherwisvelocitysediments.SurficialdepositsontheS.vw~;~generallybetween1,400and2,200fps.The4,000indicatedbeneaththenorth-facingslopeonline8probablyrepresentsparticallyfrozenground. velocitiesunderlying7,000fpschannelfillnearthecenterofthelinewereinterpretedtobelowerthanbeneaththeslopestoeitherside.Threeof5boringsdrilledalongthatlineencounteredhighlyfracturedorshearedphyllticbedrock.Theresultsofthepresentsurveycanneitherconfirmnordenythepresenceofashearzone.Althoughthetime-distanceplotsappeartobeanomalouslyirregular,reason-ablemathematicalinterpretationswereobtainedfromthedata.Lowervelocitieswereobtainedforbedrockbeneaththelakethanontheadjacentslopes(asonSW-17)butthereasonfortheselowervelocitiesisnotclearfromthedata.Theymayindicateshearedmaterialor,alterna-tively,densefillmaterialorweathered,surficiallyfracturedbedrock.4-13Woodward-ClydeConsultantsvelocitiesunderlying7,000fpschannelfillnearthecenterofthelinewereinterpretedtobelowerthanbeneaththeslopestoeitherside.Threeof5boringsdrilledalongthatlineencounteredhighlyfracturedorshearedphyllticbedrock.Theresultsofthepresentsurveycanneitherconfirmnordenythepresenceofashearzone.Althoughthetime-distanceplotsappeartobeanomalouslyirregular,reason-ablemathematicalinterpretationswereobtainedfromthedata.Lowervelocitieswereobtainedforbedrockbeneaththelakethanontheadjacentslopes(asonSW-17)butthereasonfortheselowervelocitiesisnotclearfromthedata.Theymayindicateshearedmaterialor,alterna-tively,densefillmaterialorweathered,surficiallyfracturedbedrock.4-13Woodward-ClydeConsultants Woodward-ClydeConsultants5.0GENERALOBSERVATIONSANDCONCLUSIONSMaterialsrepresentedbyvelocitylayersinterpretedforthisreporthavebeenassigned,atleastingeneralterms,whereboringandtestpitdatahavebeenavailable.Inareaswherethiscontrolhasnotbeenavailable,similari-tiesinlayeringandvelocitieswithbettercontrolledareashaveallowedassignmentofmaterialtypeswithareasonabledegreeofconfidence.Ingeneral,bedrockvelocitiesneartheWatanasitevarybetween14,000and23,000fps.Velocitiesof18,000to23,000fpsarerepresentativeofhard,unfractureddioriteasexposedintheimmediatesitevicinity.Lowerveloci-tiesindicateincreasingdegreesoffracturingandweather-ingiftherockisindeeddiorite.Theselowervelocitiesmayalsorepresentotherlithologiessuchasmetamorphiczonesorvolcanicssuchashavebeenmappedontherightabutmentdownstreamfromthedam.Velocitiesaslowas10,000fpsinintermediatelayersoverlyinghighervelocitybedrockmayrepresenthighlyweathereddiorite.Apparentlayersof13,000fpsmaterialfoundnearthemiddleoftraverse80-1andatthesouthendof80-2havebeeninterpretedasweatheredbedrockbutmayrepresentadifferentlithology.LateralchangesinbedrockvelocityhavebeennotedonseverallinesforthisandprevioussurveysneartheWatanasite.Thesechangesappeartoformbandsofincreasingvelocityeastwardfrom"TheFins"shearzoneaspresentlyinterpreted,andmayalsoformnorthwesttrendingbandsfarthertothewest.Presentdata,however,isinsufficienttoverifythispattern.Woodward-ClydeConsultants5.0GENERALOBSERVATIONSANDCONCLUSIONSMaterialsrepresentedbyvelocitylayersinterpretedforthisreporthavebeenassigned,atleastingeneralterms,whereboringandtestpitdatahavebeenavailable.Inareaswherethiscontrolhasnotbeenavailable,similari-tiesinlayeringandvelocitieswithbettercontrolledareashaveallowedassignmentofmaterialtypeswithareasonabledegreeofconfidence.Ingeneral,bedrockvelocitiesneartheWatanasitevarybetween14,000and23,000fps.Velocitiesof18,000to23,000fpsarerepresentativeofhard,unfractureddioriteasexposedintheimmediatesitevicinity.Lowerveloci-tiesindicateincreasingdegreesoffracturingandweather-ingiftherockisindeeddiorite.Theselowervelocitiesmayalsorepresentotherlithologiessuchasmetamorphiczonesorvolcanicssuchashavebeenmappedontherightabutmentdownstreamfromthedam.Velocitiesaslowas10,000fpsinintermediatelayersoverlyinghighervelocitybedrockmayrepresenthighlyweathereddiorite.Apparentlayersof13,000fpsmaterialfoundnearthemiddleoftraverse80-1andatthesouthendof80-2havebeeninterpretedasweatheredbedrockbutmayrepresentadifferentlithology.LateralchangesinbedrockvelocityhavebeennotedonseverallinesforthisandprevioussurveysneartheWatanasite.Thesechangesappeartoformbandsofincreasingvelocityeastwardfrom"TheFins"shearzoneaspresentlyinterpreted,andmayalsoformnorthwesttrendingbandsfarthertothewest.Presentdata,however,isinsufficienttoverifythispattern. Woodward·ClYde5-2IntermediatelayervelocitiesattheDevilCanyonsrangefrom5,000to10,000fps.Velocitiesaslowas7,fpscouldrepresentweatheredbedrockintheterrain.The5,000fpslayersinterpretedfromthisappeartobeequivalenttothe7,000fpslayeronSW-lthewestofthelake.Borings'inthatareashowedmaterialtobepredominantlysandwithsomegravelboulders.AttheDevilCanyonsite,thehighestbedrockveldetectedwasnearly18,000fps.ThisisthevelreportedforfreshphylliteintheareabyShannonWilson(1978).Lowervelocitybedrockinterpretedfrompresentsurveymayreflectweatheringorlateral1changes.Surficialdepositsarehighlyvariableintheareaofsurveyandarethereforedifficulttodiscussinterms.Surficialmaterialsarebestinvestigatedshortlinesandsmallgeophonespacing.Sincemostoflinesforthissurveyusedwidegeophonespacing,informationobtainedaboutsurficiallayersishiPortionsoftherelictchannelattheWatanasitehavedefinedbythepresentinterpretation.Thechanneapparentontraverses80-1,80-2, 80-6, 80-7,and8Channelfillmaterialrangesfrom5,000to9,000fpshasbeenshownbyboringstobehighlyvariablebutdominantlyalluvialsandsandgravels,boulderysiltsandsands,andtoalesserextentandclays.Twoepisodesofchannelingareappartraverses80-1,80-2,and80-8.Materialson80-9,and80-10withsimilarvelocitiesappearlithologicallysimilartothoseintherelictWoodward·ClYde5-2IntermediatelayervelocitiesattheDevilCanyonsrangefrom5,000to10,000fps.Velocitiesaslowas7,fpscouldrepresentweatheredbedrockintheterrain.The5,000fpslayersinterpretedfromthisappeartobeequivalenttothe7,000fpslayeronSW-lthewestofthelake.Borings'inthatareashowedmaterialtobepredominantlysandwithsomegravelboulders.AttheDevilCanyonsite,thehighestbedrockveldetectedwasnearly18,000fps.ThisisthevelreportedforfreshphylliteintheareabyShannonWilson(1978).Lowervelocitybedrockinterpretedfrompresentsurveymayreflectweatheringorlateral1changes.Surficialdepositsarehighlyvariableintheareaofsurveyandarethereforedifficulttodiscussinterms.Surficialmaterialsarebestinvestigatedshortlinesandsmallgeophonespacing.Sincemostoflinesforthissurveyusedwidegeophonespacing,informationobtainedaboutsurficiallayersishiPortionsoftherelictchannelattheWatanasitehavedefinedbythepresentinterpretation.Thechanneapparentontraverses80-1,80-2, 80-6, 80-7,and8Channelfillmaterialrangesfrom5,000to9,000fpshasbeenshownbyboringstobehighlyvariablebutdominantlyalluvialsandsandgravels,boulderysiltsandsands,andtoalesserextentandclays.Twoepisodesofchannelingareappartraverses80-1,80-2,and80-8.Materialson80-9,and80-10withsimilarvelocitiesappearlithologicallysimilartothoseintherelict Woodward·ClydeConsultants5-3generalized.Mostofthesurficialvelocitiesreportedhereinareprobablyaveragesofseveralsmallerdistinctlayersandaremorerelatedtothedistancefromshotpointtothefirstgeophonethantothevelocityofanypar-ticularmaterial.Withregardtostructure,twopossibleshearzoneshavebeeninterpretedfromthissurvey.ThesearenorthwesttrendingzonesextendingfromtherightabutmentattheWatanasiteandarediscussedwithrespecttotraverses80-1,and80-2inearliersections.InformationregardingapossibleshearzonebeneaththesaddledamsiteatDevilCanyonwasindeterminate.Thedatafromthepresentsurveyweresufficienttomakefairlydefiniteinterpretations.However,specificdepthsandmaterialtypesshouldbeconfirmedbyboringsincriticalareas.Wesuggestthatwhensufficientboringcontrolbecomesavailable,thatallthreerefractionsurveysbere-evaluatedtomoreaccuratelyportraycon-ditionsbetweenborings.Theinterpretationresultingfromthepresentsurveyareconsideredthemostreasonablebasedonavailableinformation.Theyarenottheonlyinterpretationspossible.ThelimitationsoftheseismicmethodandthepresentdataarediscussedfurtherinAppendixAandthereferences.Woodward·ClydeConsultants5-3generalized.Mostofthesurficialvelocitiesreportedhereinareprobablyaveragesofseveralsmallerdistinctlayersandaremorerelatedtothedistancefromshotpointtothefirstgeophonethantothevelocityofanypar-ticularmaterial.Withregardtostructure,twopossibleshearzoneshavebeeninterpretedfromthissurvey.ThesearenorthwesttrendingzonesextendingfromtherightabutmentattheWatanasiteandarediscussedwithrespecttotraverses80-1,and80-2inearliersections.InformationregardingapossibleshearzonebeneaththesaddledamsiteatDevilCanyonwasindeterminate.Thedatafromthepresentsurveyweresufficienttomakefairlydefiniteinterpretations.However,specificdepthsandmaterialtypesshouldbeconfirmedbyboringsincriticalareas.Wesuggestthatwhensufficientboringcontrolbecomesavailable,thatallthreerefractionsurveysbere-evaluatedtomoreaccuratelyportraycon-ditionsbetweenborings.Theinterpretationresultingfromthepresentsurveyareconsideredthemostreasonablebasedonavailableinformation.Theyarenottheonlyinterpretationspossible.ThelimitationsoftheseismicmethodandthepresentdataarediscussedfurtherinAppendixAandthereferences. Woodward-ClydeREFERENCESDamesandMoore,1975,Subsurfaceexploration,propWatanaDamsiteontheSusitnaRiver,Alaska:forDepartmentoftheArmy,AlaskaDistrict,ofEngineers,ContractDACW85-C-0004.Redpath,B.B.,1973,Seismicrefractionforengineeringsiteinvestigations:u.EngineerWaterwaysExperimentStation,ExplosExcavationResearchLaboratory,Livermore,CalifornTechnicalReportE-73-4,55p.ShannonandWilson,Inc.,1978,SeismicrefractionsurvSusitnaHydroelectricProject,WatanaDamsiReportforDepartmentoftheArmy,AlaskaDistriCorpsofEngineers,ContractDACW85-78-C-0027.u.S.ArmyCorpsofEngineers-AlaskaDistrict,SouthcentralRailbeltArea,AlaskaUpperSusitnaRiBasin-SupplementalFeasibilityReport:AppendixPI.Woodward-ClydeREFERENCESDamesandMoore,1975,Subsurfaceexploration,propWatanaDamsiteontheSusitnaRiver,Alaska:forDepartmentoftheArmy,AlaskaDistrict,ofEngineers,ContractDACW85-C-0004.Redpath,B.B.,1973,Seismicrefractionforengineeringsiteinvestigations:u.EngineerWaterwaysExperimentStation,ExplosExcavationResearchLaboratory,Livermore,CalifornTechnicalReportE-73-4,55p.ShannonandWilson,Inc.,1978,SeismicrefractionsurvSusitnaHydroelectricProject,WatanaDamsiReportforDepartmentoftheArmy,AlaskaDistriCorpsofEngineers,ContractDACW85-78-C-0027.U.S.ArmyCorpsofEngineers-AlaskaDistrict,SouthcentralRailbeltArea,AlaskaUpperSusitnaRiBasin-SupplementalFeasibilityReport:AppendixPI. 1Fig."'"I"'".t,.,IProjectNo.41306.iUSITNADAMWOODWARD-CLYDECONSULTANTSLOCATIONOFSEISMICREFRACTIONLINES-WATANADAMSITEEdgeThalwegCurrentSurveySEISMICREFRACTIONLINESIANote:1975SeismicLineisfromDamesandMoore,1975;allotherpreviouslinesarefromShannonandWilson,1978.Linedesignations(1A)areabbreviatedfromthoseinthetext(8-(80-1A).NOTES:I.TOPOGRAPHICCONTOURSAREBASEDONAERIALPHOTOGRAPHYDATED10JUNE1978VF.RTICA,-DATUMISMEAN5<:ALEVEL{MSUPreviousReports~~~ProposedforcurrentsurveybutalteredordeletedBBBBTB_RELICTCHANNELEIIIIIIIIIIIIBIIIIIIIIIIIIBEIIIIIIIIIIIIIIIIIIIIIBIIIB1Fig."'"I"'".t,.,IProjectNo.41306.iUSITNADAMWOODWARD-CLYDECONSULTANTSLOCATIONOFSEISMICREFRACTIONLINES-WATANADAMSITEEdgeThalwegCurrentSurveySEISMICREFRACTIONLINESIANote:1975SeismicLineisfromDamesandMoore,1975;allotherpreviouslinesarefromShannonandWilson,1978.Linedesignations(1A)areabbreviatedfromthoseinthetext(8-(80-1A).NOTES:I.TOPOGRAPHICCONTOURSAREBASEDONAERIALPHOTOGRAPHYDATED10JUNE1978VF.RTICA,-DATUMISMEAN5<:ALEVEL{MSUPreviousReports~~~ProposedforcurrentsurveybutalteredordeletedBBBBTB_RELICTCHANNELEIIIIIIIIIIIIBIIIIIIIIIIIIBEIIIIIIIIIIIIIIIIIIIIIBIIIB 2Fig.•OftQIilILlI-tOU0'.S[ISWI(,uHEICurrentSurveyPreviousReportsProjectNo.413061SUSITNADAM•T"TtS":'P1TSSEISMICREFRACTIONLINES7AWOODWARD-CLYDECONSULTANTS~ote:1975SeismicLineisfromDamesandoore,1975;allothersarefromShaWil1978..nnonandson~.Linedesignations(1A)areabbreviatedfromthoseinthetext(80-1A).LOCATIONOFSEISMICREFRACTIONL1NES-WATANABORROWAREASBANDDiI~OC?OOO"o~.M:)OCL;-.-_SCAtfo2Fig.•OftQIilILlI-tOU0'.S[ISWI(,uHEICurrentSurveyPreviousReportsProjectNo.413061SUSITNADAM•T"TtS":'P1TSSEISMICREFRACTIONLINES7AWOODWARD-CLYDECONSULTANTS~ote:1975SeismicLineisfromDamesandoore,1975;allothersarefromShaWil1978..nnonandson~.Linedesignations(1A)areabbreviatedfromthoseinthetext(80-1A).LOCATIONOFSEISMICREFRACTIONL1NES-WATANABORROWAREASBANDDiI~OC?OOO"o~.M:)OCL;-.-_SCAtfo WOODWARD-CLYDECONSULTANTSNote:AllpreviouslinesshownarebyShannonandWilson,1978.Linedesignations(1A)areabbre-viatedfromthoseinthetext(80-1A).o"""-SCA!..£'000~1~)("20CXrIIi8CurrentSurveyPreviousReportsProposedforcurrentsurveybutalteredordeletedLOCATIONOFSEISMICREFRACTIONL1NES-WATANABORROWAREAEProjectNo.SUSITNAFig.3WOODWARD-CLYDECONSULTANTSNote:AllpreviouslinesshownarebyShannonandWilson,1978.Linedesignations(1A)areabbre-viatedfromthoseinthetext(80-1A).o"""-SCA!..£'000~1~)("20CXrIIi8CurrentSurveyPreviousReportsProposedforcurrentsurveybutalteredordeletedLOCATIONOFSEISMICREFRACTIONL1NES-WATANABORROWAREAEProjectNo.SUSITNAFig.3 AUpreviOtlslinesshownarefromShannonandWilson,1978.WOOONARD-CLYDECONSULTANTSLOCATIONOFSEISMICREFRACTIONL1NES-OEVIL'SCANYONAREA4Fig.\~\"-'.'\U'\C-oJ'7-'"ProjectNo.413061SUSITNADAMCurrentSurveyPreviousReportsProposedforcurrentsurveybutalteredordelet~"\\.'j'12ANote:SCALEINFEET\'~\AUpreviOtlslinesshownarefromShannonandWilson,1978.WOOONARD-CLYDECONSULTANTSLOCATIONOFSEISMICREFRACTIONL1NES-OEVIL'SCANYONAREA4Fig.\~\"-'.'\U'\C-oJ'7-'"ProjectNo.413061SUSITNADAMCurrentSurveyPreviousReportsProposedforcurrentsurveybutalteredordelet~"\\.'j'12ANote:SCALEINFEET\'~\ co+-'ro>Q)w2300215020001850170015501--NorthI~1112/80-1F,/,/9500,/../'148GO8G~11I141ill>111;80-1E3600i6000CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=300fel'!VerticalScale:1inch=150feetNote:Elevationsadjustedtotruevi)!uesaccordingtoR&MConsultallt:o,3/19/8180-;Dr2300-1600-)----------2150~i3000148001550WOODWARD-CLYDECONSULTANTSSEISMICREFRACTIONPROFILE80-1(Sheet1of2)ProjectNo.413061Fig.SUSITNADAM5Aco+-'ro>Q)w2300215020001850170015501--NorthI~1112/80-1F,/,/9500,/../'148GO8G~11I141ill>111;80-1E3600i6000CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=300fel'!VerticalScale:1inch=150feetNote:Elevationsadjustedtotruevi)!uesaccordingtoR&MConsultallt:o,3/19/8180-;Dr2300-1600-)----------2150~i3000148001550WOODWARD-CLYDECONSULTANTSSEISMICREFRACTIONPROFILE80-1(Sheet1of2)ProjectNo.413061Fig.SUSITNADAM5A c-o+-'co>Q,)ill20001850170021502300?80-1C1450060501216007-:::....-:-,,---I!l-~.9000---------14800170080-18-~45o--.'>-.---,"'-..""8000"-"~80-1A80-1GI4:]I>I112N35E23002150+-'2000Q,)Q,)'-I-c16000.9+-'co>«~Laill1850LLQ,)C-.J1700..r:u+-'co2:15501550CompressionalwavevelocitiesinfeetpersecondHorizonta!Scaie\Jtical~ca1inchinch'"300feet150feetD-CLYDESEISMICREFRACTIONPROFILE30-1ievatior,sadjusted!!lg!\/jf'Jo.413061DAM58c-o+-'co>Q,)ill20001850170021502300?80-1C1450060501216007-:::....-:-,,---I!l-~.9000---------14800170080-18-~45o--.'>-.---,"'-..""8000"-"~80-1A80-1GI4:]I>I112N35E23002150+-'2000Q,)Q,)'-I-c16000.9+-'co>«~Laill1850LLQ,)C-.J1700..r:u+-'co2:15501550CompressionalwavevelocitiesinfeetpersecondHorizonta!Scaie\Jtical~ca1inchinch'"300feet150feetD-CLYDESEISMICREFRACTIONPROFILE30-1ievatior,sadjusted!!lg!\/jI'Jo.413061DAM58 WOODWARD-CLYDECONSULTANTS8ASUSITNADAMProjectNo.413061Fig.SEISMICREFRACTIONPROFILE80-2(Sheet1of2)Note:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/19/81HorizontalScale:1inch=300feetVerticalScale:1inch=150feetCompressionalwavevelocitiesinfeetpersecond.North~2450245080-2A80-28Endof80-2C~2300230016900IIi16700....1~-15700-I-,/,/ffilc2150/2150c.2/0.1.2........(1l/OJ(1l~/U:I~UJ/Q)IUJ13000//0.SI/...J1/2000/.cl2000//~I./~I""",,00-I----I16700I1850I1850WOODWARD-CLYDECONSULTANTS8ASUSITNADAMProjectNo.413061Fig.SEISMICREFRACTIONPROFILE80-2(Sheet1of2)Note:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/19/81HorizontalScale:1inch=300feetVerticalScale:1inch=150feetCompressionalwavevelocitiesinfeetpersecond.North~2450245080-2A80-28Endof80-2C~2300230016900IIi16700....1~-15700-I-,/,/ffilc2150/2150c.2/0.1.2........(1l/OJ(1l~/U:I~UJ/Q)IUJ13000//0.SI/...J1/2000/.cl2000//~I./~I""",,00-I----I16700I1850I1850 N35E~24502450Abuts80-2880-2C80--2080-2E/23002300+-'+-'(l)121(l)(l)(l)'i--'+-1211400c',c',....1800~1202150«......'::"_•17502150.2+-'CD1400+-'ro~,I"'.ro>>~en"./~w15400wLL,665054005970(l)8050c2000....J2000.r::.uI+-'ro~'"//.......,.".--.-/15380.-..-It1850139001850CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=300feetVerticalScale:1inch=150feetNote:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/19/81f-~··--WOODWARD-CLYDECONSULTANTS(Sheet2of2)ProjectNo.41306;Fig.SUSITNADAM6BN35E~24502450Abuts80-2880-2C80--2080-2E/23002300+-'+-'(l)121(l)(l)(l)'i--'+-1211400c',c',....1800~1202150«......'::"_•17502150.2+-'CD1400+-'ro~,I"'.ro>>~en"./~w15400wLL,665054005970(l)8050c2000....J2000.r::.uI+-'ro~'"//.......,.".--.-/15380.-..-It1850139001850CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=300feetVerticalScale:1inch=150feetNote:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/19/81f-~··--WOODWARD-CLYDECONSULTANTS(Sheet2of2)ProjectNo.41306;Fig.SUSITNADAM6B 2100150014001600148002000CrossesSW220000V>V>o.....UoC')Ioco12/'/'Elevation14...:::6...:...4'__--:::;;tI1'/7"-----'-"--'-,/•j"--"""'/7000/,//~,.-.,/20000\80-3ANorth~14,002000160021001500190019002220080-3C1800+oJ1800(])(])+oJ'+-(])(])c''+-,0C+oJ0co>+oJ~m>1700w~LL'1700CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=200feetVerticalScale:1inch=100feetWOODWARD-CLYDECONSULTANTSSEISMICREFRACTIONPROFILE80-3Note:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/19/81ProjectNo.413061SUSITNADAMFig.72100150014001600148002000CrossesSW220000V>V>o.....UoC')Ioco12/'/'Elevation14...:::6...:...4'__--:::;;tI1'/7"-----'-"--'-,/•j"--"""'/7000/,//~,.-.,/20000\80-3ANorth~14,002000160021001500190019002220080-3C1800+oJ1800(])(])+oJ'+-(])(])c''+-,0C+oJ0co>+oJ~m>1700w~LL'1700CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=200feetVerticalScale:1inch=100feetWOODWARD-CLYDECONSULTANTSSEISMICREFRACTIONPROFILE80-3Note:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/19/81ProjectNo.413061SUSITNADAMFig.7 N78E---..80-6Aco+-'ro>Q)w2000205019502100_.---e_7000_e-..12-------23002150~e\\\""-..---.....,-.......'..........................--.-----............."........15000_1100---.-2200121.....""'!----------------80--6B-------------~~1--7000----O-e_--.----.-----""""----e-- - _ . _--11500-.-_.-----..---- e -'!95022002100205021502000co+-'ro>Q)w2000019001900CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=100feetVerticalScale:inch=50feetNote:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/19/8'1WOODWARD-CLYDECONSULTANTSSEISMICREFRACTIONPROFILE80-6ProjectNo.413061SUSITNADAMFig.8N78E---..80-6Aco+-'ro>Q)w2000205019502100_.---e_7000_e-..12-------23002150~e\\\""-..---.....,-.......'..........................--.-----............."........15000_1100---.-2200121.....""'!----------------80--6B-------------~~1--7000----O-e_--.----.-----""""----e-- - _._--11500-.-_.-----..---- e -'!95022002100205021502000co+-'ro>Q)w2000019001900CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=100feetVerticalScale:inch=50feetNote:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/19/8'1WOODWARD-CLYDECONSULTANTSSEISMICREFRACTIONPROFILE80-6ProjectNo.413061SUSITNADAMFig.8 230024002200000'fromSta1975line80-7874001211850CrossesSW3-----180-7ANorth--..2400230022001800/1800.....9000.....<lJ<lJ<lJ---<lJ-;-4-c'21002100c'00..........roro>>~~illill200020001550019001900CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=200feetVerticalScale:1inch=100feetLYDECONSULTANTSNote:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/19/81PROFILE80-7Fig.DAM9230024002200000'fromSta1975line80-7874001211850CrossesSW3-----180-7ANorth--..2400230022001800/1800.....9000.....<lJ<lJ<lJ---<lJ-;-4-c'21002100c'00..........roro>>~~illill200020001550019001900CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=200feetVerticalScale:1inch=100feetLYDECONSULTANTSNote:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/19/81PROFILE80-7Fig.DAM9 2300North~2300EndoflineSW522002200-..--80-8880-8A-5000---/'/"/'2100/210012/0/20007000/2000+-'+-'0)0),/00)0)/'f-'f-C'C'0/0+-'+-'roro>>/"0)'.-~w1900/--....-/1900w8400/.11800/9000?1800/"//0-1600/"/----....--/"//"~~//////60000//"'-1700/"/""1700//~"'---//--~/23500/~0--/'--;12500----------1600165001600CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=200feetVerticalScale:1inch=100feetWOODWARD-CLYDECONSULTANTSSEISMICREFRACTIONPROFILE80-8Note:ElevationsadjustedtotruevaluesaccordingtoR&1V1Consultants,3/19/81ProjectNo.413061SUSITNADAMFig.102300North~2300EndoflineSW522002200-..--80-8880-8A-5000---/'/"/'2100/210012/0/20007000/2000+-'+-'0)0),/00)0)/'f-'f-C'C'0/0+-'+-'roro>>/"0)'.-~w1900/--....-/1900w8400/.11800/9000?1800/"//0-1600/"/----....--/"//"~~//////60000//"'-1700/"/""1700//~"'---//--~/23500/~0--/'--;12500----------1600165001600CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=200feetVerticalScale:1inch=100feetWOODWARD-CLYDECONSULTANTSSEISMICREFRACTIONPROFILE80-8Note:ElevationsadjustedtotruevaluesaccordingtoR&1V1Consultants,3/19/81ProjectNo.413061SUSITNADAMFig.10 1900190018001800170017007250+-'+-'IIIEndoflineSW14IIIIIIIII"I-"l-e'16001600e00+-'+-'CllCll>>IIIIIIWW"1500~1500---"-"-"-"-6000"----"-"-140015000~14001300CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=200feetVerticalScale:1inch=100feetNote:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/19/81Project:ProjectNo.SUSITNADAM413061SEISMICREFRACTIONPROFILE80-9Fig.11WOODWARD-CLYDECONSULTANTS1900190018001800170017007250+-'+-'IIIEndoflineSW14IIIIIIIII"I-"l-e'16001600e00+-'+-'CllCll>>IIIIIIWW"1500~1500---"-"-"-"-6000"----"-"-140015000~14001300CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=200feetVerticalScale:1inch=100feetNote:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/19/81Project:ProjectNo.SUSITNADAM413061SEISMICREFRACTIONPROFILE80-9Fig.11WOODWARD-CLYDECONSULTANTS North~80-11A1500-~150012Crosses80-11B,C,D~~-:1000-7----~.-----1-------------,-------::-./----I5000/"--I-14502800--T-----./70001450----+-'+-'-I-=------C1JC1J-----C1J-----C1J--I-----4-4--I--c'--c11000I-----00-.-.---r+-'+-'-roro----1>>IC1J~----I-1400illill1400----I1600017000....-I./'I/"././160001350-.-/-1350..-------80-11B~N40E--..~N30E--+--~North--+--r-15001500-rCrosses80-11A---2500-1400j--------------+-'+-'~-.-------•--C1JC1J-i-1000---:;:::---~c::::::-:C1J--e-----'l-/c'I-1450c'1450-----r-1600000---5000.-I-/+-'+-'---roroI~>>-------C1JC1J-illI------~o--======-------ill------------1400-If--1400I16000Compressionalwavevelocitiesinfeetpersecond1350-L.-1350HorizontalScale:1inch=100feetVerticalScale:1inch=50feetfWOODWARD-CLYDECONSULTANTSNote:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/19/81SEISMICREFRACTIONPROFILE80-11I1---'ProjectNo.413061Fig.SUSITNADAM12North~80-11A1500-~150012Crosses80-11B,C,D~~-:1000-7----~.-----1-------------,-------::-./----I5000/"--I-14502800--T-----./70001450----+-'+-'-I-=------C1JC1J-----C1J-----C1J--I-----4-4--I--c'--c11000I-----00-.-.---r+-'+-'-roro----1>>IC1J~----I-1400illill1400----I1600017000....-I./'I/"././160001350-.-/-1350..-------80-11B~N40E--..~N30E--+--~North--+--r-15001500-rCrosses80-11A---2500-1400j--------------+-'+-'~-.-------•--C1JC1J-i-1000---:;:::---~c::::::-:C1J--e-----'l-/c'I-1450c'1450-----r-1600000---5000.-I-/+-'+-'---roroI~>>-------C1JC1J-illI------~o--======-------ill------------1400-If--1400I16000Compressionalwavevelocitiesinfeetpersecond1350-L.-1350HorizontalScale:1inch=100feetVerticalScale:1inch=50feetfWOODWARD-CLYDECONSULTANTSNote:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/19/81SEISMICREFRACTIONPROFILE80-11I1---'ProjectNo.413061Fig.SUSITNADAM12 N7W~co+-'co>(l)w140012501350130015001450121450080-12CCrosses80-15-jI80-12A//~,/(",'1/100001/................/1"/,-------"I80-128140016800145013501500130012501400co+-'co>(l)wCompressionalwavevelocitiesinfeetpersecond'WOODWARD-CLYDECONSULTANTSNotes:ElevationsadjustedtotruevaluesaccordingtoR[\{MConsultants,3/19/81HorizontalScale:1inch=100feetVerticalScale:1inch:::::50feet168001300+-'(l)(l)4-C04--'co>(l)1250w1350Vl0)VlVlo....°C"l.....Io0::>LAKE80-15LakeEI.1327'Vl3;1~I°1N.....6S80E~0::>13501300+-'(1)(l)4-5000c0+-'cv>(l)w1250165001200200PROFILES5Fig.13N7W~co+-'co>(l)w140012501350130015001450121450080-12CCrosses80-15-jI80-12A//~,/(",'1/100001/................/1"/,-------"I80-128140016800145013501500130012501400co+-'co>(l)wCompressionalwavevelocitiesinfeetpersecond'WOODWARD-CLYDECONSULTANTSNotes:ElevationsadjustedtotruevaluesaccordingtoR[\{MConsultants,3/19/81HorizontalScale:1inch=100feetVerticalScale:1inch:::::50feet168001300+-'(l)(l)4-C04--'co>(l)1250w1350Vl0)VlVlo....°C"l.....Io0::>LAKE80-15LakeEI.1327'Vl3;1~I°1N.....6S80E~0::>13501300+-'(1)(l)4-5000c0+-'cv>(l)w1250165001200200PROFILES5Fig.13 1450140080-13CN7W-80-13880-13A14501400+-'+-'(1)Q)16800QlQ)'f-'f-18800c'1/Crosses80-151350c:013500+-'~roro>>I~<:J.)1327'ww130013001230012501250CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=100feetVerticalScale:1inch=50feetNots:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/1WOODWARD-CLYDECONSULTANTSSEISMICREFRACTIONPROFILES80-13ProjectNo.413061SUSITNADAMFig.141450140080-13CN7W-80-13880-13A14501400+-'+-'(1)Q)16800QlQ)'f-'f-18800c'1/Crosses80-151350c:013500+-'~roro>>I~<:J.)1327'ww130013001230012501250CompressionalwavevelocitiesinfeetpersecondHorizontalScale:1inch=100feetVerticalScale:1inch=50feetNots:ElevationsadjustedtotruevaluesaccordingtoR&MConsultants,3/1WOODWARD-CLYDECONSULTANTSSEISMICREFRACTIONPROFILES80-13ProjectNo.413061SUSITNADAMFig.14 Woodward·ClydeConsultantsAPPENDIXATIME-DISTANCERELATIONSHIPSANDLIMITATIONSOFTHEDATAPlotsofseismicwavearrivaltimeversusshotandgeophonespacing,foralllineswhichcomprisethissurveyareshownonFiguresAlthroughA10.Theseplotsarethefirststepinreductionofthedataandillustratethevariationsintherawdatawhichwereinterpretedbymethodsexplainedinthetext.Thetime-distanceplotsareessentiallythesameasthosemadeinthefieldtoevaluatethequalityofthedataasitwasaquired.Athoroughreviewoftherecordswasmadeduringdatareductionandsomechangesweremadeintheplots.Thenumberoflayersandthevelocitiesshownontheplotsareonlyapparentandoftenreflectirregularitiesinterrainorsubsurfacegeometryratherthandiscretelayers.Interpretationbasedontheseapparentvaluescanbemis-leading.Morerealisticinterpretationsaremadebytechniquesdescribedinthetext.Oftenseveralmathe-maticallycorrectinterpretationscanresultfromapar-ticulardataset.Selectionofaparticularinterpretationdependstoalargeextentonavailablecontrol,suchasfromborings,surfacemapping,andadjacentseismiclines,andonthejudgmentoftheinterpreter.AfurtherdiscussionofthegenerallimitationsoftheseismicmethodcanbefoundinRedpath(1973).Woodward·ClydeConsultantsAPPENDIXATIME-DISTANCERELATIONSHIPSANDLIMITATIONSOFTHEDATAPlotsofseismicwavearrivaltimeversusshotandgeophonespacing,foralllineswhichcomprisethissurveyareshownonFiguresAlthroughA10.Theseplotsarethefirststepinreductionofthedataandillustratethevariationsintherawdatawhichwereinterpretedbymethodsexplainedinthetext.Thetime-distanceplotsareessentiallythesameasthosemadeinthefieldtoevaluatethequalityofthedataasitwasaquired.Athoroughreviewoftherecordswasmadeduringdatareductionandsomechangesweremadeintheplots.Thenumberoflayersandthevelocitiesshownontheplotsareonlyapparentandoftenreflectirregularitiesinterrainorsubsurfacegeometryratherthandiscretelayers.Interpretationbasedontheseapparentvaluescanbemis-leading.Morerealisticinterpretationsaremadebytechniquesdescribedinthetext.Oftenseveralmathe-maticallycorrectinterpretationscanresultfromapar-ticulardataset.Selectionofaparticularinterpretationdependstoalargeextentonavailablecontrol,suchasfromborings,surfacemapping,andadjacentseismiclines,andonthejudgmentoftheinterpreter.AfurtherdiscussionofthegenerallimitationsoftheseismicmethodcanbefoundinRedpath(1973). 20080-1BA-1@1000'-NETIME-DISTANCEPLOTSSheet1of10ProjectNo.413061Fig.SUSITNADAMWOODWARD-CLYDECONSULTANTSksonbaseofplotsrefertogeophonelocationsEXPLANATIONGeophoneSpacing100feetTick@Shotpointlocation7000Apparentcompressionalwavevelocityinfeetpersecond~DotsindicatearrivaltimesinrelationtoIIbestfit"line@1000'-Directionanddistanceofoffsetshotfromendgeophone(-50ms)Arrivaltimesalongentirelineplottedat50millisecondslessthanrecordedaCD@@850'-NE(%)GeophoneSpacing100feet200aCD--@1000'150tJ>""0C0(,)Q).:!:<-J:>\:>\:>•.-100EQ)~IQ\:>\:>\:>•E80'00i=ro51'<9->°0.;::'-«50•10080-1A150tJ>tJ>""0C"'00C(,)0Q)(,).:!:Q).:!:E•E50Q)~100Q)~EEi=i=/000roro>>.;::'-.;::«'-«a50CD@0>0:;GeophoneSpacing100feetNE-C?o20080-1BA-1@1000'-NETIME-DISTANCEPLOTSSheet1of10ProjectNo.413061Fig.SUSITNADAMWOODWARD-CLYDECONSULTANTSksonbaseofplotsrefertogeophonelocationsEXPLANATIONGeophoneSpacing100feetTick@Shotpointlocation7000Apparentcompressionalwavevelocityinfeetpersecond~DotsindicatearrivaltimesinrelationtoIIbestfit"line@1000'-Directionanddistanceofoffsetshotfromendgeophone(-50ms)Arrivaltimesalongentirelineplottedat50millisecondslessthanrecordedaCD@@850'-NE(%)GeophoneSpacing100feet200aCD--@1000'150tJ>""0C0(,)Q).:!:<-J:>\)\)•.-100EQ)~IQ\)\)\)•E80'00i=ro51'<9->°0.;::'-«50•10080-1A150tJ>tJ>""0C"'00C(,)0Q)(,).:!:Q).:!:E•E50Q)~100Q)~EEi=i=/000roro>>.;::'-.;::«'-«a50CD@0>0:;GeophoneSpacing100feetNE-C?o 10080-1D10080-1Een'"0enC'"00CU0(1)Uen(1)en.-E.-(1)'E5050E(1)'i=Ei=co>co.;::>....";::«....«00®@CD®CDGeophoneSpacing100feetN-GeophoneSpacing100feetN-80-1G10050-80-1Fenen'"0'"0CC00u(1)Uen(1).~.-EE(1)'(1)'50E25Ei=i=coco>>.;::....";::«....«00®@CD®MaximumGeophoneSpacing100feetNGeophoneSpacing25feet28500NE-WOODWARD-CLYDECONSULTANTSSeeSheet1forExplanation.TIME10080-1D10080-1Een'"0enC'"00CU0(1)Uen(1)en.-E.-(1)'E5050E(1)'i=Ei=co>co.;::>....";::«....«00®@CD®CDGeophoneSpacing100feetN-GeophoneSpacing100feetN-80-1G10050-80-1Fenen'"0'"0CC00u(1)Uen(1).~.-EE(1)'(1)'50E25Ei=i=coco>>.;::....";::«....«00®@CD®MaximumGeophoneSpacing100feetNGeophoneSpacing25feet28500NE-WOODWARD-CLYDECONSULTANTSSeeSheet1forExplanation.TIME 80-1H80-115050<Jl40000<Jl"'0"'0C0C0000_---0-uu--<1.><1.>.~<Jl.-0.-E_-0---E<1.>'25<1.>'25",..",.................EE",//--...---f=i=ro,?>~\::J\)0ro>0>.;:.;:........««00CD@@CD@@GeophoneSpacing25feetN-GeophoneSpacing25feetN-80-2A80-28100100<Jl<Jl"'0C"'00CU0<1.>U.~<1.>.~.-.-EE<1.>'50<1.>'50EEi=i=roro>.;:>.....;:«....«00CD@@CD@®GeophoneSpacing100feetN--550'@GeophoneSpacing100feetN-WOODWARD-CLYDECONSULTANTSSeeSheet1forExplanation.TIIVIr::-L.JI~SheetA-380-1H80-115050<Jl40000<Jl"'0"'0C0C0000_---0-uu--<1.><1.>.~<Jl.-0.-E_-0---E<1.>'25<1.>'25",..",.................EE",//--...---f=i=ro,?>~\::J\)0ro>0>.;:.;:........««00CD@@CD@@GeophoneSpacing25feetN-GeophoneSpacing25feetN-80-2A80-28100100<Jl<Jl"'0C"'00CU0<1.>U.~<1.>.~.-.-EE<1.>'50<1.>'50EEi=i=roro>.;:>.....;:«....«00CD@@CD@®GeophoneSpacing100feetN--550'@GeophoneSpacing100feetN-WOODWARD-CLYDECONSULTANTSSeeSheet1forExplanation.TIIVIr::-L.JI~SheetA-3 A-4Fig.N-®@SOO'-NETIMEDISTANCEPLOTSSheet4of10ProjectNo.,413061SUSITNADAMWOODWARD-CLYDECONSULTANTS80-3A80-2DGeophoneSpacing100feetGeophoneSpacing100feet64000..CDo5025E0"Ei=co>'C.....«SeeSheet1forExplanation.oCD-0800'@900'-NE•••••1---135080-2E••GeophoneSpacing100feet200I80-2C150rr.'"'064000c-•08•(,)0',~,-E0"100Ei=co>'C.....8)@«50GeophoneSpacing100feetNE-1---1400150200250oCD-@1000'50(/)'"'0Co(,)0'(/)co>'C.....«0"Ei=100(/)'"'0C0(,)0',~E0"50Ei=co>'C.....«0CDA-4Fig.N-®@SOO'-NETIMEDISTANCEPLOTSSheet4of10ProjectNo.,413061SUSITNADAMWOODWARD-CLYDECONSULTANTS80-3A80-2DGeophoneSpacing100feetGeophoneSpacing100feet64000..CDo5025E0"Ei=co>'C.....«SeeSheet1forExplanation.oCD-0800'@900'-NE•••••1---135080-2E••GeophoneSpacing100feet200I80-2C150rr.'"'064000c-•08•(,)0',~,-E0"100Ei=co>'C.....8)@«50GeophoneSpacing100feetNE-1---1400150200250oCD-@1000'50(/)'"'0Co(,)0'(/)co>'C.....«0"Ei=100(/)'"'0C0(,)0',~E0"50Ei=co>'C.....«0CD 80-3880-3C10050enen""C""Cc:c:~00()()\Q)Q)enen\..-....--.........V......E0-..--•EQ)'50Q)'25EE~i=i=\\•-:~roco~------>>";:0;:........««00@@CD@@CD-350'@GeophoneSpacing100feetN-MaximumGeophoneSpacing25feetN-80-6A2002400080-3015040enen•21000•""C""C34000c:c:00••••()()Q)Q)en"~E100E20Q)'Q)'EEi=i=coco>>";:";:........««50$9000CD@Geophone25feetw-2170-0IICD@@WOODWARD-CLYD-wGeophoneSpacing100feetSeeSheet1forExplanation.80-3880-3C10050enen""C""Cc:c:~00()()\Q)Q)enen\..-....--.........V......E0-..--•EQ)'50Q)'25EE~i=i=\\•-:~roco~------>>";:0;:........««00@@CD@@CD-350'@GeophoneSpacing100feetN-MaximumGeophoneSpacing25feetN-80-6A2002400080-3015040enen•21000•""C""C34000c:c:00••••()()Q)Q)en"~E100E20Q)'Q)'EEi=i=coco>>";:";:........««50$9000CD@Geophone25feetw-2170-0IICD@@WOODWARD-CLYD-wGeophoneSpacing100feetSeeSheet1forExplanation. •@@1000'-N-••TIME-DISTANCEPLOTSSheet6of10WOODWARD-CLYDECONSULTANTS100feet80-7AGeophone~n:'l('ir,nSeeSheet1forExplanation.o200@@900'-N---80-68150'"""0C0(.)0)'"E1000)'~E~1:/0i=C"O>';::--...«50CD80-78GeophoneSpacing50feetGeophoneSpacing100feeto200CD-@900'100'"""0C0(.)250000)'"E0)'50Ei=C"O>.;::...«0®-w•150'""0C0(.)0)'"E0)'100Ei=C"O6'000>1()()()•';::...«50ProjectNo.413061SUSITNADAMFig.A-6•@@1000'-N-••TIME-DISTANCEPLOTSSheet6of10WOODWARD-CLYDECONSULTANTS100feet80-7AGeophone~n:'l('ir,nSeeSheet1forExplanation.o200@@900'-N---80-68150'"""0C0(.)0)'"E1000)'~E~°0i=C"O>';::--...«50CD80-78GeophoneSpacing50feetGeophoneSpacing100feeto200CD-@900'100'"""0C0(.)250000)'"E0)'50Ei=C"O>.;::...«0®-w•150'""0C0(.)0)'"E0)'100Ei=C"O6'000>1()()()•';::...«50ProjectNo.413061SUSITNADAMFig.A-6 @@1000'-N-80-8BGeophoneSpacing100feet•O'----'----'------''---_........L__-'--__....l--''--_L-._---l__---L.__--l-__-l--_---'L-.W@-1000'@200CD@1000'-80-8AGeophoneSpacing100feeto@-1000'®200•150150-~(J)(J)"0-0CC0"0(,),/(,)Q),/Q).!!:,-.!!:.-EEQ)'100Q)'100EE~~co(-50nis)ttl>>"C'C...6'.;rOO...««50s:>()500<:$$a~b~WOODWARD-CLYDEIf...-.-----------:-~ISeeSheet1forExplanation.•N-\\\\\//////80-9GeophoneSpacing100feetO'----'-----'----'-------'-----'----'---'---'------''------L---l----'------''------'CD-500'@50200150co>'C...«EQ)'100Ei=(J)-0Co(,)Q).!!:@@1000'-N-80-8BGeophoneSpacing100feet•O'----'----'------''---_........L__-'--__....l--''--_L-._---l__---L.__--l-__-l--_---'L-.W@-1000'@200CD@1000'-80-8AGeophoneSpacing100feeto@-1000'®200•150150-~(J)(J)"0-0CC0"0(,),/(,)Q),/Q).!!:,-.!!:.-EEQ)'100Q)'100EE~~co(-50nis)ttl>>"C'C...6'.;rOO...««50s:>()500<:$$a~b~WOODWARD-CLYDEIf...-.-----------:-~ISeeSheet1forExplanation.•N-\\\\\//////80-9GeophoneSpacing100feetO'----'-----'----'-------'-----'----'---'---'------''------L---l----'------''------'CD-500'@50200150co>'C...«EQ)'100Ei=(J)-0Co(,)Q).!!: 80-11815080-11Aen-0C0100C.l100••(J)enen-0CE0C.l(J)~(J),~E•EI-(J)~50co50>E';:...i=~co>';:...~00CD@0CD®®GeophoneSpacing100feetN--900'@GeophoneSpacing100feetNW-6080-11C••1100080-'-110••40en~oo-0C0C.l~(J)en~sooE(J)~20Ei=co>';:...~®SW-@GeophoneSpacing,25feetO'----'---...L-----J'-----'--_-'-_---J'--.....L.-.........1-__-'-__"'---_---'-__--'-__-'------~CDen-0C0C.l40(J),~E(J)~EI-co20>';:...~WOODWARD-CLYDECONSULTANTSSeeSheet1forExplanation.TIMEDISTANCEPLOTSSheet8of10ProjectNo.413061SUSITNADAMFig.A-880-11815080-11Aen-0C0100C.l100••(J)enen-0CE0C.l(J)~(J),~E•EI-(J)~50co50>E';:...i=~co>';:...~00CD@0CD®®GeophoneSpacing100feetN--900'@GeophoneSpacing100feetNW-6080-11C••1100080-'-110••40en~oo-0C0C.l~(J)en~sooE(J)~20Ei=co>';:...~®SW-@GeophoneSpacing,25feetO'----'---...L-----J'-----'--_-'-_---J'--.....L.-.........1-__-'-__"'---_---'-__--'-__-'------~CDen-0C0C.l40(J),~E(J)~EI-co20>';:...~WOODWARD-CLYDECONSULTANTSSeeSheet1forExplanation.TIMEDISTANCEPLOTSSheet8of10ProjectNo.413061SUSITNADAMFig.A-8 3080-12A</l-0CoC)Q.l.!!lEro>.;:....«2010oCD•••HydrophoneSpacing20feetS)\)1.Xl'?>40</l-0C0C)Q.l</lEQ.l~20Ei=ro>2850.;:....«0@®N-6080-128GeophoneSpacing40feet••-----.--~.....CDN-80-13A3500040</l-0C0C)Q.l.!!l.-EQ.l~20EI-ro.2:........«0CD3800080-12C@GeophoneSpacing40feet®N-</lUCog40.!!lEQ.l~Ei=ro20>.;:....«o@GeophoneSpacing40feet••CDN-Fig.A-9TIME-DISTANCEPLOTSr-WOODWARD-CLYDECONSULTANTSr--~----Pmj'"~:e:1:0::10ISUSITNADAMSeeSheet1forExplanation.3080-12A</l-0CoC)Q.l.!!lEro>.;:....«2010oCD•••HydrophoneSpacing20feetS)\)1.Xl'?>40</l-0C0C)Q.l</lEQ.l~20Ei=ro>2850.;:....«0@®N-6080-128GeophoneSpacing40feet••-----.--~.....CDN-80-13A3500040</l-0C0C)Q.l.!!l.-EQ.l~20EI-ro.2:........«0CD3800080-12C@GeophoneSpacing40feet®N-</lUCog40.!!lEQ.l~Ei=ro20>.;:....«o@GeophoneSpacing40feet••CDN-Fig.A-9TIME-DISTANCEPLOTSr-WOODWARD-CLYDECONSULTANTSr--~----Pmj'"~:e:1:0::10ISUSITNADAMSeeSheet1forExplanation. 80-13Cen-0c:ouQ)enEQ)~Ei=co>";:....«302010o80-138.HydrophoneSpacing20feetCDN-40<I)"Cc:0•uQ)"~"-EQ)'20Ei=ro>";:....«0@GeophoneSpacing40feet•CDN-...................-..--.--- e__......•.--__---e,....-__.a.----e.....-'"80-15.--....--...----'40en"Cc:0uQ)en"-EQ)~20Ei=co>";:....«0CDHydrophoneSpacing40feetNW-WOODWARD-CLYDECONSULTANTSSeeSheet1forExplanation.TIME-DISTANCEPLOTSSheet10of10ProjectNo.413061SUSITNADAM80-13Cen-0c:ouQ)enEQ)~Ei=co>";:....«302010o80-138.HydrophoneSpacing20feetCDN-40<I)"Cc:0•uQ)"~"-EQ)'20Ei=ro>";:....«0@GeophoneSpacing40feet•CDN-...................-..--.--- e__......•.--__---e,....-__.a.----e.....-'"80-15.--....--...----'40en"Cc:0uQ)en"-EQ)~20Ei=co>";:....«0CDHydrophoneSpacing40feetNW-WOODWARD-CLYDECONSULTANTSSeeSheet1forExplanation.TIME-DISTANCEPLOTSSheet10of10ProjectNo.413061SUSITNADAM