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HomeMy WebLinkAboutAPA2653r-:::-::41 n a. ' -~ ~ ,il ll j ' ·R fl ~ m fl -~ Jl .I .I .I .I I I 'i ~j L_ ..-~ ll I' ..... _ SUSITNA HYDROEI.ECTRIC PROJECT [}{1£~00~£ c ~liD&®©@ SU~)ITNA JOINT VENTURE CONSULT ANTS MEETING APRIL 15,1985 DOCUMENT N0.2653 ....__-::ALASKA POWER AUTHORITY_. ____. I J ' l i j } !' r _j II fl rt II I rl I I I I I I I I I I I I ' . SUSITNA HYDROELECTRIC PROJECT EXTERNAL REVIEW PANEL MEETING ON STAGED CONSTRUCTION April 15 and 16, 1985 Sixth Floor Conference Room AGENDA April 15, 1985 0900~-0915 Introductions -Opening Remarks 0915-·0930 0930-1000 1000-1015 1015-1030 1030-1100 llQ0-1130 113Q-1200 1200-1300 1300-1415 1415-1430 1430-1500 1500-1530 1530-1600 1600-1700+ April 16, 1985 0900·-1200 1300-1400 1400-1430 Susitna Project Description Project Master Schedule Project Status a) Licensing Effort b) Engineering Effort Engineering Update· a) Design Refinements· b) 1984 Exploration Program c) Design Memorandum ConcE~pt Lunch Staged Construction Concept Future Engineering Work Effort a) Staged Construction b) Watana Support Facilities Master Plan c) Watana Camp Expansion d) Future Geotechnica1 Investigations Discussion Consultants Prepare Report Outbriefing Future Involvement of Consultants J. B. Dischinger & J. C. Stafford C. D. Craddock C. D. Craddock Wo E. Larson W. E. Larson C. ·D. ·Craddock M. P. Bruen C. D. Craddock C. D. Craddock C. D. Craddock C. D. Craddock C. D. Craddock M. P. Bruen Consuitants ConsJJltants J. B. Dischinger & C. D. Craddock rl_ .. I !i !I it 0 ,, ·:r - . .. .· {'-. " ""'"~' ' ~ ~, ., ,., ----.. -~--~ .. ·h--'""'-'--· • · '"""'".:...-~ .. ;~ .~...;. • " &W'ti .... ...: •.• ~.:J~'ww •. •~.antltta-brt ·-·····1 ··11· ·.·.· .•. 1 .. 5: •., t1Ar ....... w~J ------lliiil .. iiiiiJ iiiii iiiiil iiiil iiiiil HARZA-EBASCO SUSITNA JOINT VENTURE ORAGANIZATION-PHASE I SERVICES-LICENSING iiiiJJ liiiil iii1l iii1l ALASKA POWER AUTHORITY JOINT VENTURE MANAG.EMENT COMMITTEE PROJECT CONTBOL MANAGER W. H. Pettigrew • ACCOUNTING • COST I SCHEDULE CONTROL December 1984 ADMINISTRATIVE ASSIST ANT ADMINISTRATIOn'• AND :CONTROL MANAGER B. J. Casey ADMINISTRATI\IIE MANAGER P. T. Lambert o PURCHASING • DOCUMENT CONTROL • WORD PROCESSING • OFFICE OPERATION CONTRACTS MANAGER B. J. Casey • CONTRACT ADMINISTRATION PRO '';CT DIRECTOR W. E. Larson ENGINEERING OPERATIONS MANAGER C. D. Craddock • GEOTECHNICAL PROGRAMS • TRANSMISSION SYSTEM • DAM SAFETY • PROJECT ESTiMATES I I I INTERNAL REV,IEW BOARD ENVIRONMENTAL PROGRAM MANAGER J. U. Thrall • AQUATIC ECOLOGY • SOCIAL SCIENCES • TERRESTRIAL ECOLOGY • HYDRAUliCS AND HYDROLOGY • FEDERAL STATE AND LOCAl PERMITS • SETTLEMENT :::-ROCESS • FERC RESPONSES NEED FOR POWER MANAGER G. V. Volland • PROJECT ECONOMICS AND FINANCING • UTILITY STUDIES • FUEL PRICING • THERMAL ALTERNATIVES .-cr-::r r· 7 1 s urs · ••••n• 7 ... r _ ... -il ; ~ iiiil . fiil.·l·. H ¥ rt:;: l. PROJECT MASTER SCHEDULE rl· [ f' __ l· ·~ ' I ~•·. 1' 1.: J I · ..•. 1 l l f. r f. l L l l l I )., '' j l }. I ' l t I I - l l I t ~' ; t I· l I r I l I ·.1_··.--.;·j·l------------------~ -. . _· .I -. -. -. :' -... -,_ ... : . ~~· =:\ • • -, -;,·· ,::;, "-. ,!~] ... I M 0 0 0 SUSITNA HY~ROELECTRIC PROJECT WATANA SCHEDULE MILESTONES DAM DESIGN CANNOT BEGIN UNTIL POWER SALES AGREEMENT CONSTRUCTION ON DAM CANNOT BEGIN UNTIL FERC LICENSE ISSUED WATANA SCHEDULED FOR COMPLETION WITH POWER ON LINE IN 1997 M2760.40 850413 <t,"J;; •• ~. ~ .. ,.: • :·-· •• ' n l . : ·, ; . '7 ft; .· ! I I ' l ! -. •• -. illfll iill ·iiiill iiii1 nil ••i1 iiitl ~~•• Mill E;:C~® ,~~,~~ ..,..., ;;-~~ .~., ;;•; m 0 0 0 0 SUSITNA HYDROELECTRIC PROJECT WATANA SCHEDULE MILESTONES TO PROVIDE POWER ON LINE IN 1997, DIVERSION OF THE RIVER MUST TAKE PLACE IMMEDIATELY AFTER BREAKUP IN 1991 TO ACCOMPLISH DIVERSION IN SPRING OF 1991, DAM CONSTRUCTION MUST BEGIN IN OCTOBER 1989 TO ALLOW DAM CONSTRUCTION TO BEGIN IN OCTOBER 1989, SUPPORT FACILITY CONSTRUCTION MUST BEGIN IN DECEMBER 1987 <FERC LICENSE> TO ALLOW SUPPORT FACILITY CONSTRUCTION TO BEGIN IN DECEMBER 1988 AND DAM CONSTRUCTION IN OCTOBER 1989, THE PERIOD FOR PLANS AND SPECIFICATIONS, DESIGN MEMOS AND CONTRACT Bim EVALUATION AND AWARD MUST BE PRECEDED BY A GEOTECHNICAL EXPLORATION PROGRAM START- ING IN THE SPRING OF 1987. o TO PROVIDE HOUSING FOR THE GEOTECHNICAL PROGRAM PERSONNEL, THE PRESENT CAMP MUST BE EXPANDED DURING THE WINTER OF 1986-87 BY USE OF A SNOW ROAD FROM THE DENALI HIGHWAY M2670.41 850413 'lj''' ·. :· : -:-:~.-q.\ 5 p , $[ 5 'S•J JP VWR..-':!!!!!!f:WfWX'~T-'F*tr---7*xrrcmwsttz,,,m-=~~==~-~"'"'~'""'""'""'"'"""'-~~~. ·-··~~~----·-·-·· 'I 1 ~. 'tl ~. ;I 1 I "I I r~ I ~~ I ~ .~ a ll L PROJECT STATUS _j I r ~ l . ./ i !, r I I j l ~I <I ~, 'I I I I I -~ ·oo -~ :I ·~ L LICENSING EFFORT _j ;,>Jil,~ • .;~;;;.;~ ~]-.... _~ ~-=-~...::.:cc.: .• ... '~1 -_ I .. --1 ~J -=' ~ s ~ ._.. ~ filill··-... ---; ' ~ flllil .. ... .lliid .. llliiitl •ll.l'ill -· .. -... !'lllRI SUSI TNA HYOROELECTEnC PROJEC1 REQUIRED AND PLANNED ACTIVITIES -FY85 ENVIRON~ENTAL -SLIDE 1 0 FOR THE PROGRAM AS A WHOLE: COMPLETION OF THE POSITION PAPERS IN SUPPORT OF THE THE SETTLEMENT PROCESS 0 FOR THE TERRESTRIAL AND WILDLIFE PROGRAM: M3550.3 850405 COMPLETION OF THE MITIGATION PLAN FOR WILDLIFE AND BOTANNICAL RESOURCES INCLUDING DEVELOPMENT OF MONITORITY PROGRAMS COMPI.ETION OF WETLANDS MAPPING AND BROWSE VEGETATION MAPPING, REFINEMENT OF THE POOL OF CANDIDATE MITIGATION LANDS COMPLETION OF BIG GAME AND FUR BEARER FIELD STUDIES - 3 - I'Diild ~ .... n ; I I ! l -~~;,~ t:;; -=a I;8J fl8 :.-1811 ,llillll IIIII Biiill i'1iii1B 11iii1 •• ..-. lal 1!11111 ._ ~ _. fll!iWJ 0 Q SUSITNA HYDROELECTRIC PROJECT REQUIRED AND PLANNED AICTIVITIES -FY85 ENVIRONMENTAL -SLIDE 2 FOR THE AQUATIC/FISHERIES PROGRAM: COMPLETION OF THE INSTREAM FLOW RELATIONSHIPS REPORT AND THE MITIGA- TION AND MONITORING PLANS IN SUPPORT OF THE FLOW REGIME SELECTION AND SETTLEMENT PROGRAM~ FOR THE CULTURAL RESOURCES: COMPLETION OF IDENTIFICATION OF ARCHEOLOGICAL SITES IN THE DAM AND IMPOUNDMENT AREA COMPLETION OF FINAL REPORT FOR UAA-MUSEUM ARCHEOLOGICAL PROGRAM (1980-1984) COMPLETION OF A PREDICTIVE MODEL FOR DETERMINING POTENTIAL FOR ARCHEOLOGICAL SITES ON LINEAR FEATURES <PROJECT ROADS AND TRANS- MISSION LINES) COMPLETION OF DETERMINATIONS OF ELIGIBILITY OF SITES FOR NATIONAL REGISTER OF HISTORIC PLACES. R ',,,_J : •. I 'I ' ! 1 ) '' liiiiill liitl llillll liiilll IIIII lllll 111/i11 .. 111iii1 -111i11 1---II'I8J aaJ lllal ..-1 .._ SUSI TNA HYDROELECTRI..C' PROJECT REQUIRED AND PLANN~ID ACTI.VITIES -FY~ ENVIRONMENTAL -SLIDE 3 0 FOR SOCIOECONOMICS: REVIEW A~ DEFINE CONSTRUCTION FOR RELATED IMPACTS REFINEMENT OF COMMUNITY ]MPACT ANALYSES COMPLETION OF RESOURCE USER IMPACT ASSESSMENT REFINEMENT OF SOCIOECONOMIC MITIGATION PLAN. 0 FOR RECREATION: M3550i3Al 850405 REFlNEMENT OF THE RECREATION PLAN BEG]N OBTAINING OPERATION AND MAINTENANCE AGREEMENTS. -5 - n' .-Jf ~ , l . . . I = I l i l _-:--,.-~~::::::::::.=~- ~ liiiil liiill Iiiii liia ---.. ----... .. -.. --!all SUS~~MA HYDROELECTRIC PROJECT I REQUIRED AND PLANNED ACTIVITIES -FY86 LICENSING AND PERMITTING 0 ASSIST IN REVIEW OF FERC FEIS AND PREPARATION FOR HEARINGS 0 CONTINUE PERMIT APPLICATIONS FOR FIELD ACTIVITIES 0 COMPLETE PREPARATION OF MOST OF THE MAJOR CONSTRUCTION PERMITS 0 COMPLETE SETTLEMENT ON MOST ISSUES - 7 - .n .. ,··::~.: ).· .· .·. ::;J J . . ~J l I t IE~ ~ lli1l[ &ill ll'all: 1E111 _. 111ii1* lllili. 111ii1: liliD~ 1&11] il!lllllitW1 111111: IIJJIIl 1!'81 B!l!im !!!!IJil l!!llR M3550.5 850405 0 0 0 0 SUSITNA HYDROELECTRIC PROJECT REQUIRED AND PLANNED ACTIVITIES -FY86 LICENSING AND PERMITTING ASSIST IN REVIEW OF FERC FEIS AND PREPARATION FOR HEARINGS CONTINUE PERMIT APPLICATIONS FOR FIELD ACTIVITIES COMPLETE PREPARATION OF MOST OF THE MAJOR CONSTRUCTION PERMITS COMPLETE SETTLEMENT ON MOST ISSUES - 7 - j .,... ~' i n .. ····~~·····-.·.'. " • r . ·.I . -~ . I I 1 ~~·~~~·~~~,~~~·~·~~~~~ ........ ..... .... .... --~ -· ---·' --.v; ~j ~~ ~l ~ ~ 0 SUSITNA HYDROELECTRIC PROJECT REQUIRED AND PLANNED ACTIVITIES -FY86 ENVIRONMENTAL -SLIDE 1 GENERAL ACTIVITIES WILL INCLUDE SUPPORT OF THE SETTLEMENT PROGRAM THROUGH AGENCY MEETINGS REVISION OF POSITION PAPERS AND DRAFTING OF MEMORANDA OF AGREEMENT PREPARATION OF TESTIMONY FOR THE HEARINGS iBJ 0 REVIEW OF AND PREPARATION OF COMMENTS ON THE FEIS WILL OCCUR IN THE FIRST HALF OF FY86 0 TERRESTRIAL AND WILDLIFE PROGRAM WILL INCLUDE FINALIZATION OF THE BROWSE INVENTORY PROGRAM AND REFINEMENT TO THE MITIGATION PROGRAM INCLUDING THE CA~DIDATE LANDS SELECTION PROCESS AS PART OF. THE SETTLEMENT PROGRAM M3550.6 850405 - 8 - . ; ... '': . ·••·· .. -~ ... !1111 1.5111 ··n·.·_:i ; ' ~ ~ • I 1 i I 1 l ! (E -~ I'"'Fi' ~--~------~ ~ ~· ~-~ ~ ~ ~ ~ ~ ~ 1!11, I.!!!I!!Siil!1 I!I!IIIB&Jl ~t ....... ..... &1M .... .... -111111111:1 --lliilllllt --it -~ =-.i ~i ~j .... J ~" ~J ~ 0 0 0 0 SUSITNA HYDROELECTRIC PROJECT REQUIRED AND PLANNED ACTIVITIES -FY86 ENVIRONMENTAL -SLIDE 2 AQUATIC FISHERIES PROGRAM FOR FY86 ACTIVITIES WILL FOCUS ON REFINEMENT OF THE FLOW REGIME, MITIGATION PLAN AND MONITORING PROGRAM FOR THE CULTURAL RESOURCES, TESTING PREDICTIVE MODEL BY SAMPLING ALONG THE ' LINEAR FEATURES, COMPLETION OF THE IMPACT ASSESSMENT AND MITIGATION PLAN FOR SOCIOECONOMICS, FINALIZE MITIGATION PLAN FOR RECR~ATION, OBTAIN 0 & M AGREEMENTS M3550.7 850405 -q ..- n i. :· ; . . I. ': I ~ '' f ~,:,;.;>: ";;-·! ., '1 I t () l t ,•. < i ''·' ~ -.~~-<~ ~: I ,. i ---::r· \ ; ~ -----~---~---~---~~ 0 0 SUSITNA HYDROELECTRIC PROJECT NEED FOR POWER -SLIDE 1 . NEED FOR POWER HEARINGS: TESTIMONY WILL BE UPDATED AS NECESSARY PRIOR TO THE NEED FOR POWER HEARINGS SCHEDULED FOR NOVEMBER 1985 . DISCOVERY ACTIVITIES, THE HEARINGS, AND THE PREPARATION OF BRIEFS WILL BE . REQUIRED IN FY86 PROVISIONAL POWER SALES AGREEMENTS: PROVISIONAL POWER SALES AGREEMENTS ARE ANTICIPATED BY DECEMBER 1, 1985 DEPENDING UPON THE LEVEL OF AGREEMENT, WORK MAY CONTINUE TO REFINE.lHESE THESE AGREEMENTS . .:<>. • M3550 ~ 409 l! 850 • 10 • • 0 : ·, • • ' • -11 ~ ·~-.~~ -1 Y=~~-;~ 1 -_··~· ., 7':,· ,__,.....,,_w..,._~,_- ' n .. --······--, ; l I : L . I 1 -;I i 1 I t) ·'1 ~:; §jjj_' Jfmi ~s..-:. .... f["fil ~-~ ~ ~ ~: ~~ ~~ ~t ~': lfS.!!!!!!I; ~~ I!!!I!IISU Slill!aii'. f -ll1iliSI lBllla1B ---~-~; ~. ~-~; ~.. ~.l ~j 0 0 SUSITNA HYDROELECTRIC PROJECT NEED FOR POWER -SLIDE 2 FLOW REGIME NEGOTIATIONS AND ENVIRONMENTAL SUPPORT: -. THE PROJECT OPERATION STUDIES IDENTIFIED FOR FY85 WILL CONTINUE THROUGH FY86 FEIS AND LICENSING SUPPORT: THE FEIS WILL REQUIRE A THOROUGH REVIEW AND THE PREPARATION OF ·rECHNICAL COMMENTS WHEN IT IS RELEASED IN SEPTEMBER RESPONSES TO REQUESTS BY FERC MAY BE REQUIRED PRIOR TO THE INITIATION OF THE HEARING PROCESS M3550 ... 11 850409 -12 - m m ~~. Lit n1 m ~~ ~ . ' t lll ]f iH· ,I >... ~~ ~~ J J J L • ~ ~ ? . • "' . ~ . . . ~ .... ~ + <,., ... ~ . . . . . ~ . ·}f:. . ' .... • it': -. . . . ' ENGINEERING EFFORT _j f n. --·-.j . I I . ! . I ~I J 1 ~ :";:"~~.:.:::--.c....~.:=:::: S?# ~ ~ t.=P lfiia r&iil fiial liSil ~ ~ !iii~ tiS~ ~ ~ ~ iiii ~ ~ Iiiii 0 0 0 0 0 0 M3550.1 850408 SUSITNA HYDROELECTRIC PROJECT REQUIRED AND PLANNED ACTIVITIES -FY85 ENGINEERING -SLIDE 1 PROVIDE DETAILED OVERALL PROJECT SCHEDULE FOR ENGINEERING AND CONSTRUCTION AND UPDATE AS REQUIRED PARTICIPATE IN REVIEW AND PREPARATION OF BEST PRACTICES MANUALS INITIATE MASTER PLAN FOR WATANA SUPPORT FACILITIES DAM SAFETY HEARINGS PREPARATION MONITORING AND EVALUATION OF GEOTECHNICAL AND HYDROLOGIC OBSERVATION DEVICES PARTICIPATE IN REVIEW AND PREPARATION OF POSITION PAPERS - 1 - ;~~) 'i ;n··.·.·-~ . I I I t j I ! ~ l' / r-::~ ~ ~ ... ~ liim ~~ ~e~ ~--~ 'tf'~ rF5ii =~~ ~ ~ ....... Ullilliii iiiiili;s · ·-t~ ~c~ ):~ L!:l'B tm . ~ · -...~ ~~ ~ E..._ ill:~ ~ .... ~1~ -~ ~~~ 0 0 0 0 0 M3550/1A 850410 ~USITNA HYDROELECTRIC PROJECT REQUIRED AND PLANNED ACTIVITIES -FY85 ENGINEERING -SLIDE 2 DEVELOP SUSITNA STAGED CONSTRUCTION CONCEPT PREPARE DEIS SUPPLEMENTAL COMMENTS ON STAGED CONSTRUCTION INITIATE FERC LICENSE APPLICATION REVISION IN REGARD TO STAGED CONSTRUC- TION EVALUATION OF EXISTING TRANSMISSION SYSTEMS TRANSMISSION LINE PLANNING -VICINITY OF ANCHORAGE AND FAIRBANKS -lA - . , "'R I n m·rrrnmrssrrrmm-wY77ZT7W--~s---"~·-~-=-··-···--:-='"'~_,., .. ~···~-------···-·-··---~·--·~---····-·-·-·~--··· • 1 :n--~.1 . I I I I f i-'--~;-fiiri-Ji §~ ~ ~ niig ~ ~ ~ tEiiii ~ ~ ~ ~ =-~ =-E!l lltiiS 0 0 0 0 M3550.2 850405 SUSITNA HYDROELECTRIC PROJECT REQUIRED AND PLANNED ACTIVITIES -FY85 LICENSING AND PERMITTING CONTINUE COORDINATION OF PREPARATION AND SUBMITTAL OF FLOW REGIME IN RESPONSE TO FERC INFORMATION REQUEST CONTINUE PREPARATION OF·FIELD PERMIT APPLICATIONS AND APPLICATIONS FOR MAJOR CONSTRUCTION PERMITS CONTINUE SETTLEMENT PROCESS INCLUDING FINISHING POSITION PAPERS AND BEGINNING FORMAL NEGOTIATIONS WITH AGENCIES, INTERVENORS AND NATIVE ORGANIZATIONS COMPLETE THE SERIES OF FIVE BEST MANAGEMENT PRACTICES MANUALS AND DISTRIBUTE - 2 - .. firti'f ~ .................. _ _..._~···~ .. , .... ,. ...... ~~··--.-· .. w··:---~; "''"~-... _·· ·~,.·:::;:;;·~ ..-~·-,-... ~-----=----.--.-;,"id·o·-·;;;,;;¢)j''";-;:-:-. ·;;-:-w;:_--~~~-,:~::~-~~,-~...,·.~~~~-~ ":~':::"''~" ... ...,~.~-'f''i~'""~"'···-·-.,·-.....' l n--, ' .... -.-~ ..... J • -,;-:--l . I ! ! I I \ --~:O:.."':::.___i t l ! I •• ~ s·~ ~"' ~ ~=~ ,-.::~ F".,._. ~ ~ ~-~ ~:;:~ ~ JCZ,.~ ~ ~ r:i3 ~ ~'Uif ~ N'lliliiii . ·-~~. ~ ~ ~--·-~~ ~~ .!.~ t~ £~ t:P:B ~~ ~ L~ ' i --~ ~ 0 0 0 0 0 M3550.4 850405 SUSITNA HYDROELECTRIC PROJECT REQUIRED AND PLANNED ACTIVITIES -FY86 ENGINEERING -SLIDE 1 DEVELOP ORGANIZATIONAL CONCEPT FOR IMPLEMENTING DESIGN OF WATANA DAM AND RESERVOIR UPDATE OVERALL PROJECT SCHEDULE FOR ENGINEERING AND CONSTRUCTION PREPARE TESTIMONY FOR DAM SAFETY AND ENVIRONMENTAL HEARINGS, SUPPORT DISCOVERY PROCESS FEIS REVIEW AND COMMENT FINALIZE FERC LICENSE APPLICATION REVISION FOR STAGED CONSTRUCTION - 6 - """' -o...,<---~-......---, .......... ,..,-_,..,.,_,_.._-.,-.~-~··-~-------~---~~----· ---.. -I . -:::.....-,: ____ ............. -_. ___ .........___;;_ ~--~~~-=----~--~--~~,_~:~----·~~···~=~~--· st•r. • .. ~~~=~~~~L~l:~~~-·.l.,.;da{ii~-J:Jifllu;;•~:*l&: t&fitlramt~Yir·l···._;~r-11:·~~~~---· .·_ .•. -.11-h·.ll!··~~-• . . __ _ ~~~,..---.............. ~ i n.····.--~ l -. I ' . f , I i 1 l ! ' i l l i ' t~.·.w m-i r,, ~ ~ fui?ii ~h&! rsr;; F&a ~ ~ ~ ~ ~ ~ ~ ~ ~ r~ 0 0 0 0 0 M3550/4A 850408 SUSITNA HYDROELECTRIC PROJEC.I REQUIRED AND PLANNED ACTIVITIES -FY86 r:-unTu~EnTUI"\ SLIDE 2 C.l'i.., !l'i c. 1"\l. , .. b - INITIATE PLAN OF STUDY FOR MAJOR GEOTECHNICAL EXPLORATION PROGRAM AT WATANA INITIATE SPECIFICATIONS FOR WATANA GEOTECHNICAL EXPLORATION PROGRAM INITIATE DEVELOPMENT OF DESIGN MEMORANDA CONCEPT FOR WATANA MONITORING AND EVALUATION OF GEOTECHNICAL AND HYDROLOGIC OBSERVATION DEVICES RESPOND TO FERC REQUESTS FOR ADDITIONAL INFORMATION -6A - -~-...-·-··~ -~ ·-··~~ ··----"..,_, .... ,~.~--~~ --------. --_. ~-~·we·· F'"' . •at~'"····----·=--• u• • ••. = 1 .;.,.,, ........... ..,~~-___ .. _ \:'i'AA.i@;i_~·--;,....r~ -0'·. ·: . ·.-.·. ·-· , . . & I --. ' 1. ~,1 ~n lf u ll Jj -rn m . ~1 .,., ··-~ .. )1 ... ~ .... !I\ .. ~_._; L_ ENGINEERING UPDATE _j I. ! ; ! ! I I. I i f ! ). l I I . f ' ' I j i i ' ' I . l r f I i ~ , in 1f ·u '~ ~ 'I ~ I L DESIGN REFINEMENTS I ! 1 r l l 1 l L l' ~ j l I· i I 1 I l l I . i r . . ·~.· 1. SUSITNA HYDROELECTRIC PROJECT WATANA AND DEVIL CANYON DESIGN REFINEMENTS Introduction Described herein are design refinements to the Susitna Hydroelectric Project License Application filed by the Alaska Power Authority (Power Authority) in February, 1983. 1.1 Watana Development Design Refinements The proposed design refinements for Watana development are as follows: 1. 2 3. 4. 5. 6. 7. 12146 850409 Reduced bedrock and alluvium excavation and treatment for the dam embankment foundation. Revised configuration and composition of the dam and the cofferdams ' internal zoning. revised vertical setting and size of diversion tunnels and inversed cofferdam heights. Relocation and reorien~ation of the transfonner gallery, powerhouse and surge chamber caverns. Revised arrangement of power conduits and power intake. Increase in size of main service spillway to pass all of the probable maximum flood and elimination of the emergency (fuse-plug type) spillway. Revised layout of approach channels to the Power intake and spillway. 1 ~'~.;.•. ru ~ ;lft. J 8 .. 9. Construction facilities reduced in accordance with reductions in above construction work. Rotational speed of turbine-generator units increased from 225 to 257 .. 1 rpm. 10. SF6 gas-insulated switchgear and bus selected instead of an open- air switchyard supplied by oil-filled main leads from the under- ground powerhouse. 11. Selection of open-cut trench instead of tunnel for spillway chute drainage. 1.1e1 Excavation and Foundation Treatment for Dam The main dam foundation treatment, as refined, would reduce rock excavation beneath the core and shells and limit excavation of the river valley alluvium to the central 80% of the dam foundation. The areas of the dam in proximity to the upstream and downstream toes of the embankment are now planned to be founded on the river bed alluvium, with the central 80% to have a bedrock foundation. The 1983 Winter Geologic explorations have shown that the bedrock is of a better quality than originally anticipated. Therfore, only limited excavation of bedrock beneath the embankment is foreseen in the river channel. Fresh hard diorite in most instances exists from the bedrock surface. Removal or foundation treatment (dental excavation or concrete backfill) will be performed in local areas beneath the shells where erodible or otherwise unsatisfactory foundation bedrock is encountered. The quantity of rock to be removed under the embankment will be reduced from that estimated in License Application by about 3. 75 million cubic yards. The License Application cost estimates assumed a trench beneath the impervious core and filters averaging 40 12146 850409 2 ···L-,·-., ---········"·~·-----.-·-~···-o: .. --~·-----···--"··· ...... ;.........., -:. r/ " ~ . .::. ·' ... ·. JJ '0' '' L , Jl ]I :II Jl Jl ·J ~. feet deep~ and an average excavated depth under the shells of 10 feet. The design refinement provides a core trench 10 feet deep in the river section, and 20 feet deep on the abutments. Excavation under the shells on the abutments averages one foot. A reduction in the total length of grout galleries, grout curtain drilling, and grouting was also made in view of the better quality foundation bedrock. 1.1.2 Dam and Cofferdam Configuration and Compositio~ The License Application design for the dam cross section has been essentially retained as it is considered to be satisfactory and will produce a staBle structure. To increase safety against seismic shaking, the steepening of the exterior slopes near the embankment crest has been eliminated. This results in the same exterior slope from crest to toe both upstream and downstream. The embankment internal zoning design has also been modified to incorporate materials from the required excavations along with by-product materials from the processing operations. The refined layout includes the use of rock and processed granular materials in the shells outsid~ the impervious core. This section increases the utilization of available materials and will reduce required borrow as well as reduce spoil requirements. The cofferdam sections were revised to a more conservative design and a positive slurry trench cutoff to bedrock would b~ provided. 1.1.3 Vertical Setting and Size of Diversion Tunnels and Cofferdam Heights The two diversion tunnels as shown in the License Application were 38 foot diameter concrete lined. The total discharge capacity is 80,500 cfs. One tunnel has an intake portal invert below the river bed level, while the other is 70 feet higher. With the deep alluvium in the river bed upstream, the low tunnel could result in sediment deposition during flood recession. This tunnel could be partially filled with gravels thereby reducing its hydraulic capacity for the next flood season. 121LJ.6 850409 3 'iJ Jl JJ Jf I Therefore, the refinement consists of raising the intake portal invert of the lower tunnel to El. 1445. The refinements also consist of adjusting the location and orientation of the tunnels based on more recent geological information and lowering the upper tunnel for greater hydraulic efficiency which permits decreasing the diameters of both tunnels to 36 feet. The cofferdam locations would simultaneously be adjusted to utilize the reduced excavation of alluvium in the dam foundation. The length of the upstream cofferdam would be reduced by relocating it further downstream. The freeboard of the cofferdam was increased to provide additional safety against ice pileup or higher water levels caused by ice jams. A comparison of the refined design with the License Applicat;~'>.., follows: Tunnel 1 U/S Invert El. Tunnel 1 D/S Invert El. Tunnel 2 U/S Invert El. Tunnel 2 D/S Invert El. U/S Ice-Free Water Level U/S Cofferdam Crest El. U/S Cofferdam Freeboard D/S Ice-free Water Level D/S Cofferdam Crest El. D/S Cofferdam Freeboard License Application .... 1490 1450 1420 1405 El. 1535 1545 (ft.) 10 E 1468 1472 (ft.) 4 Refined Design 1468 1455 1445 1430 1532 1550 18 1468 1495 27 12146 .,I 850409 4 L~---~,~--------·-- ~ ,, ,, 1' .. u D II JJ II 1.1.4 Relocation and Reorientation of Caverns A review of the site geology, as presented ~n prior geotechnical reports (1980-81 and 1982), indicated a majo~ set of fracures which trended N 50°W and a second minor set perpendicular to these. The caverns for the powerhouse, transformer gallery, and surge chamber, as shown in the License Application, trend in a direction approximately N 20°W, straddling between the major joint system and a subjoint system. Excavation of the lcngi tudina 1 walls would be improved i.f the majcr joint planes were to intersect the walls as near to the perpendicular as possible. Consequently, the caverns were rotated accordingly. This change wi 11 result in less over break of rock in the cavern faces, lessen construction problern~l and contribute to greater safety during construction. This change llras also beneficial to the changes in the water conduit and access tunnel geometry described below. 1.1.5 Power Conduits and Intake The License Application indi~ates a single structure power intake with six intake passages located approximately 1,000 feet upstream from the dam axis. The power conduits consist of six individual penstock tunnel and shafts with a developed length of about 1,500 feet each connecting the intake structure to thE~ powerhouse, and two tailrnce tunnels approximately 2,000 feet long connecting the powerhouse to the river. The downstream 300 feet of t.)ne of the tailrace tunnels utilized the downstream portion of one of the diversion tunnels. To reduce the power conduit length in the design refinement, the intake structure was shifted to a location between the spillway and the river channel and nearer to the dam axis resulting in relocation and shortening of the power conduits. The number of penstock tunnels was reduced .from sj.x to three, each of which bifurcates to smaller penstock tunnels at a point approximately 200 fet!t upstream from the powerhouse. 12146 850409 5 I ~3~.·, l l ' I! IJ II Jl Gu.,rd valves will be provided for each turbine. The net head on the generating units will be grea~er, and the shorter, more efficient power conduits will provide better unit operation. Overall, the three power tunnel design will be more cost effective than the six penstock tunnel design. Vertical ~hafts are also recommended instead of sloping shafts because excavation an~ concreting of vertical shafts . requ1.res less time, personnel, and equipment., and given the geologic conditions, shoulcl result in less overbreak. 1.1.6 Spillways The License Application shows provisions for dual spillways. In this concept, the service spillway, the outlet works, and two generating units would discharge flows corresponding to floods with 1:10,000 year occurance probability (Exhibit E, pp.E-2-107 4.1~3, (a), (iii)). For larger floods, the reservoir would be surcharged to a maximum of El. 2201 (during the PHF event). Prior to reaching that reservo1.r level, the fuse plug would begin to be breached and after a pet'iod of time, would be fully eroded. At this time, the service spilluay and fuse-plug emergency spill~ray will reach their peak discharges of 152,000 cs and 120,000 cfs, respectively. This spillway concept would allo~r passing of the Probable Haximum Flood (PMF) without overtopping th~ dam. During the PMF, the minimumn reservoir freeboard ·would be 6 feet. Alternative spillway arrangements of a gated, s.ingle spillway were studied, sized for the PMF with ctiteria of maintaining the same freeboard as the dual spillway scheme and hence Lhe same safety against dam overtoppingo lh"hile these studies ~·Tere initiated to seek lower costs, elimination of the fuse plug was considered a benefit environmentally, aesthetically and, in a minor way, to dam safety. Questions had b-een raised by FERC in their request for supplemental information of .April 12, 1983 (See Comment No. 2 on pp. 31+ of Exhibit F 12146 850409 6 '' j IJ II lJ II ,I ---~.rl_; .. :f'·.;:, .· :· ' , ~· · •.. ,W of that request) as to the safety of the fuse plug against adverse conditions of freezing weather. While the response to the comment indicated that the design could be arranged with proper selection of granular materials to erode under freezing conditions successfully and thereby provide the desired flood release, elimination of the fuse plug structure would eliminate all risk of the fuse plug not operating. Inasmuch as a gated spillway is required in both the single and dual spillway concepts, and the reliability of a given gate design is not materially affected by its size, the larger single spillway design, absent the fuse plug, has equivalent or slightly enhanced safety over the dual spillway design in the License Application. A more tangible benefit of the single spillway design over the dual spillway design included in the License Application is its lower cost for the .3ame total design capacity. Moreover, the analyses led the Power Authority to conclude tilat a single spillway design had certain environmental advantages, in addition to being as safe and as effective as the dual spillway design. Environmental advantages to the single spillway scheme are as follows; a) b) 12146 850409 Visual impact of the project would be· reduced by eliminating the fuse plug spillway. Because of the significant extent of the cut for this water passage, its elimination is considered a major improvement in project aesthetics. The overall ground surface areas that would be disturbed by construction would be reduced. Construction of the License Application service spillway would entail disturbing approximately 13 acres and construction of the emel:'gency spillway would entail disturbing 55 acres for a total 68 acres for the dual spillway scheme. The single spillway design would require disturbance of approximately 22 acres, thus resulting in a net 7 ~~ ~.·J I ~· lu fJ II '' '[_' .. ···.,.,· .. ··. reduction of 46 acres of ground surface to be di sbJrbed by construction. c) With either the single or dual spillway scheme, . the s erv1. ce spillway would be operated only for floods greater than the 1:50 year occurance. For smaller floods, spill discharges in excess of power flows would be made with the hollow cone valves. Thus, there would be no difference in environmental consequences for either the single or dual spillway aesign for such flows. d) For flows between the 1:50 and 1:10,000 year flood flow, only the gated service spillway would be operated with the dual spillway scheme (The fuse plug would remain intact). Service spillway operation for the dual spillway scheme in this flow range would have environmental effects equal to or slightly worse than the larger gated service spillway being proposed 1.n the single spillway scheme. This statement can be amplified as follows: FACTOR (For any given flow in the range considered) 1. Operating Head 2. Height of spillway bucket exit above tailwat:er 3. Approxiruate width of spillway chute exit 4. Chute e~it velocity ESTIMATED EFFECT OF SERVICE SPILLWAY OPERATION SMALL SPILLWAY LARGE SPILLWAY (License Application) (Proposed Refinement) Same Same 80 feet Reference Value Same Same 120 feet Same or slightly less because of increased air and skin friction drag 12146 850409 8 ,, IJ "[__····· j ·I' ' '~ ·.·, ' ..... . 5. Flow energy con- centration (Energy per unit width of chute requiring di ssi pat ion) Reference Lower by approxi- mately 33% 6. Plunge depth ReferencE"~ Value Seme or slightly less because of lower unit energy in the impact area 7. Gas supersaturation Refere~nce 8. River bed erosion Refe~renc::e Same or slightly less S;;~me or s 1 ight ly less 9. River bank erosion Same Same While it can be argued that the absolute differences of the factors cited above may be infinitestimal in those cases which are presented as "slightly less" ' it is presentation to show, at the least, the intent of the above environmental equivalence between the two schemes in the flow range considered. For both spillway schemes and for any given flood flow between the 1:50 year up to the 1: 10,000 year event, a 11 flows higher than the hydraulic capacity of: the turbines and the cone valves wi 11 be passed over the spillway with resultant erosion and gas supersaturation effects. While logic clearly dictates that these effects will necessarily be less for the large spillway, the differences cannot be quantified . ln any meaningful way . USlng existing state of the art analyses. e) For floods of the 1:10,000 year or greater recur renee interva 1, the proposed larger service spillway would eliminate severe erosion of about 60 acres which w·ould be associated with operation of the fuse plug spillway as described in the License Application. However, a one in 10,000 year or greater event which differentially impacts only 60 acres is not within a reasonable 12146 85Q!409 9 II ll ll II II ~c_··"''··.· I ~.' ~,:,., .. ·: 'r 1.. ~ • ',' . .,. •· . : : i . . . range of i~portance to be seriously considered from an environmental point of view. Thus, a single spillway is recommended with the capacity to pass the PMF while maintaining the same reservoir surcharge criterion. The design refinement also recommends use of radial gates instead of vertical lift gates as shown in the License Application~ A radial gate installation would cost less than a vertical lift gate installation and in the experience of the project design consultant and other agencies radial gates are the usual choice for operation under subfreezing conditions. 1.1.7 Power Intake and Spillway Approach Channels The hydraulic conditions of the approach channels to the power intake and spillway as shown in the License Application can be improved with the relocation of the powerhouJe and the power conduits. In the License Application, the power intake is located such that it appears to impede flow to the spillway. The design refinement location of the power· intake will eliminate this effect. The approach channels as refined will require larger quantities of rock excavation; however, this material can be used for fill in the dam and for concrete aggregate. 1.1.8 Construction Facilities The lower construction quantities will reduce labor requirements thereby reducing the size of the construction camp and catering . serv1.ces .. 12146 850409 ''-l.,j 10 !I iJ: 1.1.9 Turbine-Generator Unit Speed The design refinement consists of increasing the synchronous speed of the turbine-generator units from 225 rpm as shown in the License Application to 257.1 rpm. Basically, a higher speed unit requires a deeper setting of the turbine distributor below tailwater. The depth shown 1n the License Application is, however, lower than necessary for the 225 rpm turbine and is also sufficient for the 257.1 rpm turbine. This increase in speed will reduce the physical size and cost of the turbine-generator set and also may possibly result in some reduction in the powerhouse size at the time the final design is made. 1.1.10 Gas Insulated Switchgear and Bus Revisions of the high voltage conductors from the main power transformer to the ground surface and elimination of the ground level switchyard by use of SF6 gas insulated switchgear and bus are proposed in the design refinement. The revisions include use of a single 9' - 0" diameter vertical SF6 bus shaft instead of two vertical 7' -6" diameter cable shafts from the transformer gallery to the surface. All switching equipment will be underground thus simplifying maintenance. This refinement will provide an improved environment for operation and maintenance by elimination of the potential for icing of equi prnent in a ground level switchyard. Substitution of SF6 buses for oil-filled cables will improve safety by removal of fire hazards from the cable shaft area. Elimination of the switchyard will also reduce environmental impact and improve aesthetics by the construction of fewer and smaller surface structures. 12146 850409 11 fJ I I tL· .. · .· ,. " ''!",. I I; . . ' ,, ' . 1.1.11 Spillway Chute Drainage Drainage of the spillway chute us shown on the License Application consists of a drainage tunnel excavated 30 feet below the chute sleb under the longitudinal centerline of the chute. Angled drainage holes would lead form box drains under the chute slab to the drainage tunnel. The design refinement consists of substituting for the drainage tunnel a gallery excavated in an open cut trench also along the longitudinal centerline of the chute. Box drains would then lead to this galle.ry. This refinement simplifies the construction procedure from that of a tunnelling operation to open cut excavation. 1.2 Devil Canyon Development Design Refinement The design refinement proposed for Devil Canyon Development consists of increasing the main service ~pillway capacity to pass the Probable Maximum Flood (PMF), thereby allowing elimination of the fuse-plug type emergency spillway shown in the License Application. This refinement provides the following listed advantages to which the discussion heretofore under 1.1.6 for the same t.Yatana development features applies: a) The larger single spill~ay will be less costly than the dual spillways. b) c) 12146 850409 Reduction of visual impact and improved aesthetics. The net ground surface areas to be disturbed by construction can be reduced. Construction of the License Application service and emergency spillways are approximately 12 and 15 acres, respectively for a total of 27 acres. The enlarged single spillway would require disturbance of approximately 15 acres 12 'n:\' ,::j ' ~: 12146 850409 d) resulting in a reduction by 12 acres of ground surface disturbance. No net differential environmental impacts due to operation of the spillway, as previously described for Watana. 13 C···: .. ;.., :. ~ \ • . I o-:_ "'c;=--,-""--~~l fiiil iiiii S'i iiiii iiHii ilia ;;~;; ;r.;;; SFii @i&: ;a;i\t ;;:;·;;; ~T\~ E·~ g;.:~ ~;~~ ~ ~;~t:j g::~:~ SUSITNA HYDROELECTRIC PROJECT WATANA DESIGN REFINEMENTS -SLIDE 1 1. REDUCED BEDROCK AND ALLUVIUM EXCAVATION AND TREATMENT FOR THE DAM EMBANKMENT FOUNDATION 2. REVISED CONFIGURATION AND COMPOSITION OF THE DAM AND THE COFFERDAMS' INTERNAL ZONING 3. REVISED VERTICAL SETTING AND SIZE OF DIVERSION TUNNELS AND INVERSED COFFERDAM HEIGHTS 4. RELOCATION AND REORIENTATION OF THE TRANSFORMER GALLERY, POWERHOUSE AND SURGE CHAMBER CAVERNS 5. REVISED ARRANGEMENT OF POWER CONDUITS AND POWER INTAKE 6. INCREASE IN SIZE OF MAIN SERVICE SPILLWAY TO PASS ALL OF THE PROBABLE MAXIMUM FLOOD AND ELIMINATION OF THE EMERGENCY CFUSE-PLUG TYPE> SPILLWAY L,:~~ ~§6~8a 8 '« . 10 • .... , y ••• ••t , ·x t¥?'11¢ ~w ztmeA:c-vwewrrw·':2rn"W"""~~~.£ii'~~~~~~~:.,;~~,.-;;::::,-~~~,:=::.~--.'>Go==··,_-~,~_..__....,__ .. .·.'I " ~. ' a -rtllllll I MFM"ttr ; n ! •. ' . ·• . -I ' -$;, :l· ''"· l -····~------'~""· •dk-4 ... ~ e ~e ... ·a J ream 7 Ph • liatJii···· ..... .rt)m afMI Jiiii .iiii; Fii r.Mi Ftii rrt·"t" r,·~~cM r= .. ri r=; ~ '"~;.~ r;:;: t,:.=.:'2 t~~~ F""':·~ PC-~ e:::..:~ r:.:·:--1 r-~"---~i SUSITNA HYDROEL[CTRIC PROJECT WATANA DESIGN REFINEMENTS -SLIDE 2 7. REVISED LAYOUT OF APPROACH CHANNELS TO THE POWER INTAKE AND SPILLWAY I B. CONSTRUCTION FACILITIES REDUCED IN ACCORDANCE WITH REDUCTIONS IN ABOVE CONSTRUC- TION WORK 9. ROTATIONAL SPEED OF TURBINE-GENERATOR UNITS INCREASED FROM 225 TO 257.1 RPM 10. SF6 GAS-INSUlATED SWITCHGEAR AND BUS SELECTED INSTEAD OF AN OPEN-AIR SWITCHYARD SUPPLIED BY OIL-FILLED MAIN LEADS FROM THE UNDERGROUND POWERHOUSE 11. SELECTION OF OPEN-CUT TRENCH INSTEAD OF TUNNEL FOR SPILLWAY CHUTE DRAINAGE 12. REVISION OF RELICT CHANNEL TREATMENT M3550.9 850408 -11 - ... f n • h u ~·J L fll. tl z < ..J a. ..J < a: ·w z w ~ ~ < c < z <C 1-< ~ ..... Ca w . CJ z 0 CJ w CIJ z w (.) -....1 0 a: w u. ....1 < z -~ -a: 0 ·n:.~ . .l 1 l·~.-;.,,;:~ ... 1 ·- 4 ; ~ .. ""' -:~ ' G ' . . < \ \ / ~ "\ .... a: -0 >·•l'> a:a:t w-(J)N w_i :.cc w .. · ) I ! I ' . I I \ . . • . . I \ \, ' ' ....... . ' \ . , . .'j 'I J .1 / /:; I I I ! I I' l l \ li w ...J -< (.) (/') \~/ I 1 l . \ . \ . -"'-o., 01 II) I j o- I \ \ '· I I r.~ /(ot I• ~ If /I I I / i ~----------~~---+ffrw~~-i~\rtt1~~~~-------~~r-~-----~------~-----4 -:z::--- . ,' .. , \ \ ' I \ ., '\ '· ,, . \ \ \ \ \ • \ I \ ' \ \() \'~,'·,''!.c/i)\ ~ \ ~ h-_____ , _____________ _. ____________ , ____ _. __ ~--------~~~----~----------~--~~N ' ~ ' '· co LU w ' I I ~1Bo 0 ____ ~ -= : 1600----- DEVIL CANYON GENERAL PLAN ORIGINAL FERC LICENSE CONCEPT ~··....__ .... ~.--~ .. · RESERVOIR '\. EL. 1455 \ .:.-----.------"l I 0 400 FT. SCALE ._1 ---~1 ff. . ''1· n ~- DEVIL CANYON GENERAL PLAN FERC LICENSE OR STAGED CONSTRUCTION ----....... , ~ ------~-~, '"' ..,. ... ---~ -.... --,., :;u· MAIN 1 ~~·ACCESS "-TUNNEL i ;_IJ. . \ ~ . .... ---~ .... ------- ul' ,.,-__./ u--·~ ~ / U'---~ '-J SCALE: 1"= 200'· :11 1Li'2/85 -EE 13 L ..... . " ... -----H--SAODlE. DAM ·CREST EL. 1'472. 'f l fl :~ ·t :J ; ;J 1 .11 il {J II ,,J L 1984 EXPLORATION PROGRAM i l I l l. ,. \.. l ' rr ' i \ FY84 EXPLORATION PROGRAM r.·r r : ! SACK GROUND 'fl fl ~j :I I I G a 5d761.0 1 so.41o I ·····-[_·~·········· ' ' . . . . FERC ENGINEERS SITE VISIT EXPRESSED CONCERN OVER ERODIBILITY AND S~EPAGE POTENTIAL OF THE FINS FERC LETTER-FORMALLY EXPRESSED CONCERNS EXPLORATIONS IN THE FINS AREA ARE INADEQUATE TO PREDICT THE SEEPAGE POTENTIAL UNDER FULL RESERVOIR CONDITIONS NEED TO RECONSIDER THE SCHEDULING OF ADDITIONAL SITE INVESTIGATIONS IN FY84/85 IN ORDER TO AVOID DELAYS IN LICENSE APA RESPONDED TO FERC TRANSMITTED COST ESTIMATES FOR TREATMENT OF THE RELICT CHANNEL PROPOSED AN EXPLORATION PROGRAM IN THE FINS, OUTLET <FINGERBUSTER), AND POWERHOUSE AREAS ''.;:; I . J ; ..... -q·,_:~··.J,-,"~{~-~"'; ', ~' ' ~ '.~.r f rr. l ' I . ~~'.·. l ~ l ~ 'I l II ~ ~ I I I --r)=: FINS 0 0 50761.1 850410 FY84 EXPLORATION PROGRAM OBJECTIVES REVIEW EXISTING DATA DELINEATE OVERBURDEN STRATIGRAPHY AND MATERIAL PROPERTIES DETERMINE ROCK QUALITY; EXTENT OF WEATHERING, FRACTURING, SHEARING, AND ALTERATION DETERMINE PERMEABILITY WITHIN THE ROCK NUMBER OF HOLES 5 ANGLE HOLES; 254 TO 849 FEET . ' rn I , jJ , l '·- fll 11.1 H :I fl I I I :.! .I jl' L ' FY84 EXPLORATION PROGRAM FINS -REVIEW EXISTING DATA 0 507~)1.2 8501~13 GEOLOGIC MAPPING OF FINS -THREE NW-SE SHEARS AND FRACTURE ZONES OF SIGNIFICANT WIDTH AND CONTINUITY TO BE CONSIDERED CORE FROM DR-18, 19, AND 20 ROCK IN DR-18, 19 CONSISTS OF HARD, STRONG, CLOSELY JOINTED DIORITE AND FELSITE, RQD = 0 -98%; DR-20 CONSISTS OF HIGHLY WEATHERED DIORITE, RQD IS ZERO THROUGHOUT -NO WATER LOSSES DURING DRILLING WERE NOTED ON THE CORE LOGS -LIMITED PIEZOMETRIC DATA INDICATES 'THAT THE PRESENT AND POST RESERVOIR PIEZOMETRIC LEVELS APPROXIMATE THE GROUND SURFACE PRESENCE OF IMPERVIOUS STRATA IMMEDIATELY OVERLYING BEDROCK, THUS MINIMIZING AN ENTRANCE . FOR WATER GEOPHYSICS -EXTENSION OF FINS TO NW IS INFERRED BASED ON SEISMIC REFRACTION; LOW VELOCITY ZONE APPROXIMATELY 1,000 FEET WIDE -LOW SEISMIC VELOCITY ZONE COINCIDES WITH A BEDROCK LOW )\.-' ~H ,K~ t i 1800 ' v 1900 r,n l l [I • i ~B ~H •' J 0 1000 FT. ryl f, I 2too ! \ SCAlE ,_t ----..J L ..... ~II =""'~ ~f)() • coe ttOt.~s • OTHER HQLE S ]I --LOW SEISMJC VELOCtTY ZONE \ / . , ... ~ n,......__..----------------------- ~-• ...,. v·-rr·h·~i ~' ~a ?We ~--::r.,,_,_..,.,_,_ ... ""-,,,.:-:. . .. . ·,:·.::::·-·r--' -, r·r · " ~~-~-· ~. ~ ~ =~ -~ ·~..,. ,.,. .... _, ~"t -~ ... .... Jliliiilill Jiiiiii Ew ...-. ~ ~ ;.:--;~-: ~ ~ f) ~ . ... I Jl, ~ .. ' . -: ; .~_ ,. ~ ···':' l { I.! .: • ...:.---~:-::-~ T 1 ... ~ (:. .... ~ ,..; "#··· ~~ ~ -·~·· .. ~··~""~' REHOLE LOCATION DETAIL PH84 ~A !J; { o !I lotu· SCALE~ ... t, -2:!'•)() .. ZI~O ?Ia.) 20~0 • " .,. -t: ~ ) ) p l<·c.; r""~ ': .. .._", ,...~ ~1 jo ·~ ... r,... .. ... ., 1 .. ._, .... ! :.· .. ~· ··};, . .J.biiu-y-1· -.;;/ "',:.~.J • ·~! ;: ~.. t -• .,-• • • • •• ,• I ,..;OH84"7 ~-.··.. ..... .._ :..:.>~ ... () ~ ,:i 1'¥ t\ ~.­- . ' ~ SI'ILLWAY -·· J• • j h·. '. . . ~ \ ' ' I'OWERIIOUSE /-.:":. • \ ~."-.c ··:·· • 'ir~ 'I ~ .'"" ;·.· :.,~..,~ ~~ ...r ... ~r_,·.t ... ·.·,·~ ... ;.:.~·: J P ·~-~''···I . ~ ..... ~ ;.'?· \\'i ...... , ~ .. N ' • •A?-' • . .!'' . .• I I;\ ~ l "·•' .-r,• ,. j: I ,' ,•'"-:t.' !I\'·~·~ . ,.. r •. _ ., 4 ,. • • 1 \ A. • ~..-•1 {J·.r..l ··'/{~.'.• '\ ->" ; J , , ~-~ •. 1r'· . \ 1 . ./~' 'I J!i ' f,l' I t ,. -.. ~ ... . -"~, 1f: h <" ... ,, ...... .. _. • P 14-' ~, " , I . . .... ., . , ( ,..,, . . :1 t,.' .... ~·. '· ,/'', .i.l . ""'·.· .. / 1"'-'::! .. • • # l . -' .OH: .. ~. ;j';_ .. ~}f ... ~. ~ a""-.... ,,.. '01-184-~: ,. • : J/1:1' ;.....:: .• -. -'·..]': .. ·k:--·-~1\-' -..... -·.; • ·-J' ...• _::r-··---~-- • pHt14·6· • .• \ ' • .'I •• '~. , .. . ,"' t • .. ' \ -·· '""'\ ~ • tf I • _. I ! .. ... f j. -·. ~.\i···:..' '\·~,. ·r ·-·' .. ..... .H u , • . .r ;• ~)14 -e /DH&ot-l 0~14-4~ DH14-4A . ;c.. D!f-4-10 · .. "-···· ..... I J. ' ' '\, . :•.. \_ ...... ' ... ·, ..... ··' .. ' ~-...... t -. " .LGEE BOREHOLE LOC" liON DEl AIL (,0 ,~) ,.•} .. .. .. -.a.-.::.::.:__.; . ........ ·, /( .•. ~ ~·- "" ": . .: t '· """'-. ,. j OlVEf!SIOH TUIIHEL7 lfO. 2 ,. ,. J.. •• .,. f __ ..... -.r t.f_:J .. . ;---+ _..,.. ,.. -\ . .,. If "• . --: ·t··~ '~ . ··1 ..... -_. -~.,.-.... ;;:. ..... ---~:~-•.• \..:_OIVERSUlH TUNNEL ',, ' . ~--'(-~, ..... .;-I lfO. I •• j,..~; ;p· "'· .. ~ ~,\ t . ... ·, ~--j ., ... ......... :! ... . ..... 1. 4 \ ... • ~: • I .. '· . •' ••• . .. ~ ~· •· . ; . I> ~ • 4 .~ ; tl ! '~ '· ' • .. ~ .. ~,~·llt ..... _.. ~ . ,. ~ . ·'· .... , • " ·"-.___UPSTREAM COFFEIIOAM [L 1:1!!10 ___ .... ~~ ,Aofl .. CREST OF OAW- EL.ZZIO .0 t : !L' ••j (~ #, ~ 9.4 ·~·Hf$;&:-..-!t•.~ lL -~-----~·- OOWNSTREA" COFFEROAU ,, " __ / .. .· ... .. "'"' n ~~ .... ~ ~~ n· -l ~· A " ;\ . I 1 / 0 200 400 fEET SCAlE E? =-3 ALASKA POWER AUTHORITY • ~-SUSITNA HYDROELECTRIC PRC~JECT WATAHA DAM AND RESERVOIR 1984 GEOTECHNICAL PROGRAM BOREHOLE LOCATION PLAN .... 1 __ _ ~'a..\W.\!.ll•III~;~J t•.tot .......... , tot .. ,,-'1( At"t'tti\t.tU . .,_ ........ ,:;;, ... ~---- UI •14~1\"'•t. Ai A~f\A JtJl f" t'U &MM.-.; itO EXHIBli 3 ~ rn 'N tm m z~ '11 ~~ ~I ~ " ··~ ' ll ,, ~ "~ ~·I t • ~~ I i .·; .. I f ' 1.· . FY84 EXPLORATION PROGRAM FINS -1984 DATA SUMMARY 0 0 f) 50761.3 850410 OVERBURDEN CONSISTS MOSTLY OF OUTWASH WITH A DISCONTINUOUS LAYER OF DENSE TILL IMMEDIATELY OVERLYING BEDROCK BEDROCK CONSISTS PRIMARILY OF HARD, STRONG DIORITE AND QUARTZ DIORITE WITH ALTERED AND HIGHLY WEATHERED ZONES OCCURRING LOCALLY RECOVERY WAS GOOD, RQD VALUES VARIED CONSIDERABLY LOW LUGEON VALUES, OeO -3.5 A LAYER OF HIGHLY WEATHERED DECOMPOSED DIORITE EXISTS AT THE SOIL/ROCK INTERFACE OVER A PORTION OF THE AREA; THE ROCK IS SOFT TO SLIGHTLY HARD, LOCALLY FRIABLE; LAYER UP TO 80 FEET THICK, HREAL EXTENT UNKNOWN GROUNDWATER LEVEL IS Al A GENERAL DEPTH OF 10 TO 20 FEET BELOW THE GROUND SURFACE, ELEVATION 2070 TO 211~2 .. -L~------~~·_ .... ·-··------· ' ' ' . j .. ,,: .;~: .. ~ .. ' . ·. ·: ,, '' ·~ . 7 i! .... ,"" ;·;-· ·,_~ ~:·," ~· .. 3''1 ~ ... .. t e; :z 0 £ ... ... IIJ sw 2200 .• 2100. 2000 UIOO 1100 1700 1100 11500 1400 •• 1300 DH64-4A DHI4-10 lP110J. U rT.l lPIIOJ. 100 flJ --..,.._ ZOIIE OF HIGHLY WEATHERED TO DECOMPOSED DIORITE ---- tO 2~4 0 fl ~~~-----~------~-------J o+oo 1+00 2+00 3+00 -~· " ··- l. -.,.::.."'!:"""' ... liail ~ ...... lliii! j-··-j •••• ,ma ~ ~·<'~ .... .ca - v __ ---- ttD83-2 IPRUJ 14 U ft 1 ' GfiOUilO SUIIF I,CE I DH84-1 (PROJ 140 Fl ,j OUTWASII ,~- -OU'IWASU I"' -...... . ---~ -.._ _ _ _ ·, ---. OUIIVJ,Su ___ --~ -...---I~· - - -• ~ ----""JIIC't\" _..-I I :t.Y · · · · · · · · · • · ;o:;;f;-. ----"'----->-..::::.:_ -Y----j I •• ~!WASil "' .. ~-h -------S/EAII i':'.•CTLJRE ZONE fRACIUIIt: 2,~1E CLOSE YO -\'.CLOSElY fRACTURE SEVER!L Y WEATIEAEO - SltEAR ,r-fRACII!AE 10M; ~' ~FRACtURE ZOM; -SHEAR .....--fRACtURE ZOt<E DIORITE SUITE: Gene~euy freah, hard, ftlrong :\.':,\2'·. . fRACTURE ZON£ ' , fRACTURE ZONf • WASSI':IE '<) ID. US~ FT. -CLOSE 10 V CIOSEL V fRACIURI." 10841~ff I I ' ANDESITE PORPHYRY I DIKE I ANDfiiTE I PORPHYRY DIKE --CLOSE TO II. CLOSELY fllACTUR£0 • • AL TER1\TOON ZON£ CLOSElY TO II CLOSELY fRACtURED -fRACTURE. ZONE NE -2200 2100 01'!100 11100 1100 1700 11100 I GOO 1400 1300 l l 7+00 10+00 4+00 &~00 8+00 11+00 G-tOO 9+00 GEOLOGIC SECTION B-B 1{-~-~--~~~~~~ ~----------- _,.....;~ - ;:: "' e; z 0 I= <C > ~ Ill j;,a ;:a ~~;~ ~ ~ SOIL m1ll ~ ROCK ~ D em r.:;·~ ~ t:T.":l 11.!....!...1 CONTACTS ~ OTHER• -~--....... LEGENQ OUTWASH TILL DIORITE SUITE; DtORirt., OIWITZ DIORII£,GII~If0Dl!HIIr£ DIORITE SUITE; s&:Vfft[L'I' WEAT!Ellt:D TO ll£COMP<lSEO AlTfflEO OiORITE, woot:AATfLY ttl SEVEIIflY .&l.ltMII MCNZDNITf TO GRANITE JONDfSITE I'ORPIIYFI'I' SUI!fiCIA.l DEPOSIT TOP ~ BEDROCK BfOROCIC, I;OTTEO llili£11£ APPIIOXIMA'l'E GIIOUHD'.IIATEII TAIILE WITH DATA POIHT JU..Y 3,11114 fUTURE lESS THAH 5f££T WIDE ]-AL11o•r-ffATUR£ GREATER THAJI 5 FEET WIDE ~-·-GEOLOGIC ffATUftE, SE£ A.CIIfl AMEIIICAM, ltlll NOTES• CD ® @ SECTION I..OcATIOH lttOWN llH fliHIIIT I. SUIIFACE PROFILE FIIOII I"• ZOO' TOI'OGIIAPHK: MAP; CORPS OF ENGINEES ,11171 0 G) FOil DETAILED eoi!EHOLE DEICIIII'TIOIIII, tiE EXPlORATION LOGS IN API'£NDilC A. FOR GROUNDWATER DATA Sf£ AI'PEUDUC f. CHANGES IH LITHOLOGY All£ SHOWN GRAPtliCAllY FDA THIC:ICNESSES GIIEAT~II THAN 4 fEfT 0 50 100 FEET SCALE F ;;;=) ALASKA POWER AUTHORITY -SUS1fci_~!1VQi!QELEC!AIC PAOJI€cr-==:_ WATANII DAW AND RESERVOIR FINS AREA GEOLOIGIC SECTION B-B "'"'~:-,:. .. ~*~•· ... ~it-.:.e- ,..,..,_.., ..... ,,, .. ,, .... " .. t ...... tl• ._,_, ---·-----· ""~--·~-.... -----i.M-~hU . EXHIBIT 8 ...... ,,UUI!o\,fol AI f\•,,.,..,, .. ~1 ; JUt. 't l9tt• ... ~~\,., t,; ~ ii .. :e. F !• ·c ~ ~ II ,:;:.; ;1: .. .. '' .. .. ~ .~\­~~ --... Jeew m;;:;; i'~!li . .., _,...,; ~ --~:~ p=""-.t; 2400 ;: 2200 ... ... ~ 2000 z 0 ;:: 1100 < > ... 1100 ~· .... ... 1400 ~ ~ ~ ~ ~1 ~·I ~ ¥1 ~ ~ ~;.J' ~~~~£~ GIIOUNOSUlfACf. -~ •• --/ - -··-·-I lOP Of ll£llROCK OVUli.IUAO!.N · --_ -.. -• • ~ ---------~--L-----j!UJ>_]L ____ 1l----~-~ fj ~ ------.. --------. ...._ ZO>IE OF HfOHl '( WEA THEA ED ' TO DECOMPOSED DIORITE L -UMNUNIOIUAI. ()I'( A'-liNG 1'001. EL.2lU ·····+-... 2~00 2200 2000 1800 1800 I .fOG .L..J DIORITE SUITE 00't'UU UUTUU L---~--------------~-------------L--------------'~------------L--------------'~-------------'---·-----------L--------------L--------------L--------------' I O+OO 10+00 20+00 ~n~nn ···--·-·-- 70+00 2~00 2300 2200 2100 2000 1800 11100 ··- 1100 1800 ~ / .· "' ...... ,_ r-l .~ _.....--""'i\r..._~/ < ~ "¥' -~ \ ...... _....- ~ ulf ~ -~-----~ GEOLOGIC PROFILE A-A IRUE SCAlE !I !/ ~ DR-20 (PROJ IOdl -· ......... ~ -~. j O~ERIIOOD£N J --: ------' --=·· TOPOl' J--lltL ~t.· ______ :::;:::;--- II£DAOCI< ·: • ..-.,... : .,_ J-- ...... -~ --5 -' ro. 2~2 .• _.,..... -----..__----- 1D. 2483 ..._ ZONE OF HIGH _ ___->O .. Co ... oi.'o WEATHERED ___..-·~"" 1.0 •• , ~ DIORITE SUITE: Go.o:arally rraah, hard, alrong eo+oo. 110+00 IOD+OO ~~ !/ ~ 2400 2300 --I 2200 2100 • 2000 taOO 1800 T100 1800 1600 1400 ... OO·L· ------------.J -·------------~------------~~------------~ ID+Ii<o' 20+00 30+00 40+00 150+00 60+00 70+00 -- O+OO ou+OO IO+OO IOO+OO GEOLOGIC PROFILE A-A SCAlE EXAilGEHMEO 4V (0 IH ;::: ... ... !!; z 0 ;:: "' > ~ ... ;: Ul ... !!; z 0 ;:: < > IU .... ... fi ·~, .. ~-.-.-,.-. -, --&---~------------_--~:--------------------------- ;;'";.;3 SOIL ~.illl [-·-~;t ~ 0 [:"':] ROCK C.:J r:';'c·•"':l ~ r.;-;~'1 li.!.:.!£J [.:_] f .,.,, ":..!..:! -CONTACTS .... " ..... .nTlEi'IIP.. OTHEA· -'\1- -s }-s s F Fl A NOTES: <D (i) ® ® <i> ® 0 ® ® == .~ ~ LEGEND OUTIIIASH TILL LACUSTRINE ALLU\'IUI.I DIORITE SUITE, OIOIIIY[, OUAIItl IXORIIE, CIIAH0016all DIORITE SUITE, UV£AUr "'fATHf.REO Atl£REO DIORITE, UOOEAA1ELY ro S(V[AfLYAlii.D MONZONITE TO GRAIUTE AIWESITE PORPHYRY fELSIC 'SURFICIAL OfPOSIT TOP OF BfllllOCK HEOROCK, DOTTED 'MiER£ APPIIOMIWATE GIIOUIIOW.tn'll lqut WITH DATA I'OINT JU..Y l, 1!114 fEATURE LESS THAH UEU WillE FEATUR£ GIIEAT£11 TKAH 3 fEET WID( SHEAR CLOSELY TO VERY CLOSEI.Y fRACTURED FRACTURE ZONE (\IERY CLOSELY fRACTUIIEDI ALTERED,WEAK SfCTIOf:. LOCATION IIIOWN OM UIIIIIT I. SURfACE I'IIOfiLf fiiOM I"• ZOO' TOI'()IIIAI'HIC MAP; COIIPI Of fNIINfEIII,Itfl. fOil DETAilfP liOIIfHCILE DUCIIIPTIOIII, IU flii'LOIIATION LOll IN API'IIIDik A. fOil GliOUHDW4oTEII O•HA iii::: AI'PINDIJI f. CHANOU !II LITHOI.OGY AU IIHO .. N fOil THICI(NfiiU IIIUTIEII THAN 4 fU')". TOI' Of IIOCI( ,.IIC#LIE AD.IIIIT£0 TO fiT THE llDIIOCII fLfVATION IH fACii I'IIOJlCU:D lOIII HOLE fOil GEOLOGIC IIOTU ON 01114 -4A, Slf filii AIIU G[QLOQIC f'IIOfllE 1•11 fl..EIIATION Of GIIOliNDWAT£11 TAIILI£ 1111011-11 IS fiiOiol AllG. 1871.11STIIUW£NTATION MONITOIIIolQ INDICATES LITTLE CHANGE 1H ~Till TAIL£ AfTEII \IIAT£11 L£\'ELS HAll£ ~'IJ.ILIZIO, THEREfORE DATA I'RON Dfi·IIIS COfiSID(r;£0 'o'ALID. ALL BOIIfltOL£5 AilE PIIOJECYfD. THf. DIITANC£ PIIOJECT[Q IS FROM THE BOREHOLE COLLAR. ALASKA POWER AUTHORITY ~usiTtJA-·~v!?!~Q~~~~ r~19 ff!.9:i§cr-:·~ WATAHA OAW AHD IIEIEIIVOift FINS AREA GEOLOGIC PROFILE A-A !J:A,".tlf\td\o~ ~·----.---....... ---... ....,, ___ ......... .... AHC1t0ho\U1 A. AS..._ A '!1!-... ·------..~-. ... ..... ~ 1814 EXHIRIY 8 • :.-• ••• ,. '. < .,m i' ~ 1i ~ FY84 EXPLORATION PROGRAM ·n FINS -CONCLUSION r.l F {I -~ I I I I I :I •• .I . ' 0 50761.4 850410 --~ ., • '" "" "">. .• ~~· •. EROSION AND SEEPAGE POTENTIAL IS CONSIDERED LOW BASED ON 'fHE FOLLOWING: NO VERTICAL THROUGH-GOING ZONES OF ANY SIGNIFICANT WIDTH OR CONTINUITY OCCUR WHICH COULD TRANSMIT WATER; A SURFICIAL LAYER OF HIGHLY WEATHERED ROCK OCCURS LOCALLY LOW HYDRAULIC GRADIENT BETWEEN THE SUSITNA RIVER AND TSUSENA CREEK LOW PERMEABILITY WITHIN THE ROCK MASS . . ·· ...• ;;·r: If,~)-····. ' '\l' • 1 • .• FY84 EXPLORATION PROGRAM OUTLET AND POWERHOUSE AREAS ~~ l ' - 11 I I 0 0 50761.5 850410 --~c--·_.~ __ --__ --·---·--"~~ ... -.. -~~---·-·--··_ -. i ''i.t.''. t·· ·~ ' ' ' ;. ; i ,...1 OBJECTIVES REVIEW EXISTING DATA DELINEATE TYPE OF OVERBURDEN DELINEATE TOP OF ROCK DETERMINE ROCK QUALITY; EXTENT OF WEATHERING, FRACTURING, SHEARING, AND ALTERATION DETERMINE ROCK PERMEABILITY AND STRENGTH GROUNDWATER MONITORING NUMBER OF HOLES 5 ANGLE HOLES IN THE OUTLET AREA; 100 TO 265 FEET 1 ANGLE HOLE IN THE POWERHOUSE AREA; 765 FEET FY84 EXPLORATION PROGRAM OUTLET AREA -REVIEW EXISTING DATA n ! . I I . , I 0 0 0 50761.6 850410 : ~·····r=~~.-. --·-···-·"'---~······-. l i t <:~t< -'' '_, -~ '' ' ,, ,·, i 0 . "!. GEOLOGIC MAPPING CORE LACK OF OUTCROPS IN THE UPSTREAM PORTION OF THE AREA AND BELOW CL. 1750 SEVERAL NW-SE AND N-S CLOSELY FRACTURED ZONES AND SHEARS; CONCEALED OVER MUCH OF THE AREA LACK OF CORE HOLES GEOPHYSICS LOW VELOCITY LAYER EXTENDING TO DEPTHS OF 50 TO 100 FEET OVER A PORTION OF THE AREA !' ! l l l r r 11 FY84 EXPLORATION PROGRAM f1· ~ OUTLET AREA -1984 DATA SUMMARY rt. ~­. r __ fl ~~ L [[f I l.. I 0 0 OVERBURDEN CONSISTS PRIMARILY OF TALUS WITH SOME POSSIBLE TRACES OF ALLUVIUM BELOW EL. 1525; OVERBURDEN THICKNESS VARIES FROM 5 TO 15 FEET BEDROCK CONSISTS OF DIORITE AND QUARTZ DIORITE; ROCK QUALITY VARIES AS A FUNCTION OF THE DEGREE OF ALTERATION AND FRACTURING RQD VALUES VARIED CONSIDERABLY, LOW VALUES ARE FOUND IN THE DOWNSTREAM HOLES DH84-5, 7 LUGEON V/l.LUES VARIED CONSIDERABLY, RANGING FROM 0 TO 50+; LOCALLY HIGH IN DH84-5, 7, 8 GEOPHYSICS INDICATES INCREASING DENSITY WITH DEPTH BELOW 65 FEET o PERMAFROST, ICE-FILLED JOINTS WERE DETECTED IN DH 84-3, 6, 8; MAY EXIST TO DEPTHS OF 60+ FEET . o GROUNDWATER LEVEL IS GENERALLY 40 TO 80 FEET BELOW THE GROUND SURFACE; ARTESIAN FLOW OF APPROXIMATELY 1.0 GPM OCCURS IN DH84-8 I = . I 50761.7 850410 '-~:·c:. ~~-,:··-~?' ,; '':'::::":";;:: \ '!1 ¥' . ' ~ ' . • ' ' . t~·' .. , ... • •. · t{' ' . \ , ', 0 ~ .,.. ~ /" ,., • Ill • "" .. ~ . ,. .... o . • P ' -•vW . , "' • • C. -. • • .. I. • .. , G; • .e .. : -fl c; -- . . .. · . . ·~ -. ~."··w-:e -~~-,.._ .. """·:,....,..,. ...,~·~-~Xt'''M'"·.JIIHhi!: 1··........,..~.:.·:,,._,. '-~--~~-.· ... ·.. . ~-~-A --·--·---···--......_-.... •« ... ~~at..Mifn '•.:tttt''mr ,.,,.._.. ..... a .Lc~.-....... ..... .A'c........&.-. . .-.--•~~:d.:.·· itt~~-....._ ~-;~., .--:~,.t.:,.~·-'""~;;~. ~,~'.l,llli Ill8l iiiiii Ciiiii1 !Jili1liilj ; .,:··;c :iiS ~--':-' ~r~ . Flt; --"':1 . .&;;iiiii;l r71 1 I ~------! -------- NW 1800-. DH84-5 (PilO.J.TOflJ ·I ~ 1700 IIOD ' ; .. ~j ~ SHEARS ,SitEAR ,ffiAClUR£ ZOII!; I.D. lGS.~ fT c .. ~ ... Jl J.COD • I I :.tOO 1200 o+oo I+DD 2+00 ;::: ... Ill ~ z 0 ~ < > ... ... w SE ~I 1100 '1700 ' GROI.f<O SUIIF ACE DH84-3 ll'IIQJ 20 fl) 1800 ~(+f.:' ?;,~IJl, ~'1'f~T,tf:tl]Y.P:f.l77:J.,.,.._ ~l --fHACTUR£0 uoo SH£AA LIASSIIIE SL 101000 SL 1011100 AlTERED ID 2GHFT ~ ~i't,( 1 'h~· ttil ·' '!/ 0~ TO V. CLOSEL AlTERtD S.E;;R 1·1400 MASSIVE I .fRAClUIIE ZONE ID 1322 fl TD IGU H.\ ' 1300 • 1200 3+00 4+00 5+00 I+DO HDO I+OD li+OO 10+00 11+00 12+00 GEOLOGIC SECTION D-D N lliOO ~ 1800 .J I 1700 1600 UOO 1-400 ~j GR<lU'O SUIIFACE "7 ~ .. I I DH84-8 \-'/~ (PROJ. IOOf ~I DHS.C-3 IPROJ JO FT I a/ a/ i/ ·w·>~~·· / fRD~-~'' · LIDO WEAlll :l; SliSIINA RJVEI! • ·• ~ HD83-<18 r-..._ __ .,~ """" .. ~--"~1 ~ ;::: w w ~ z 0 ;:: < > w ... ... s r 111UO 1ol!'l HOO 1600 uoo 1-400 1300 O+OO HOD ~'""~-~~-~~=-~:·:·~-- 1.0 1322FJ II:~ '-~11"-~UVIUI.I ~ I JOP Of ROCK .J . r.o 101 o n J' 2+00 3-too· 4+00 1300 fi+OD 1+00 7+00 1+00 ll+oo IO+DO GEOLOGIC SECTION F-F ~:,:; [.!•·. . ·~--~-'-~: ____ ,~ -.. ' .. :.:. ::; ,;..., ";' ~~"" ~-~~. ... " ' ..... -;-:~--~-~...-~-...-4 - _l-1 ., -A;, .--!:! .o:::::::::l'l ;::: w w !!: z 0 ;:: < > w ... w .-... ~~_,..;o;.~.~ _.,~~-~ .:::::=:::= ==ill ~~ ~ ___ .,...,,."l"'JJ! ., ~ --· ~ --'f --::-3 ·~ _,_ N 2000 ~ s '~ ~ 2000 SOIL: Bml ROCK: ~ fO!';<!', ~ ~ ;:::: w w !!: z 0 ~ < > w ... w 11100 1100' 1700 1100 II 1(~ I I~ 1iDO ·1000 ·1700 ' .. 1 , "'OPEN fllAC.IUI<E 'SH£"jif\ ... -~~ \ ,--GROOOO SUIIFACE ,.00 11100-• -SibR r ~ •-..._fRACIUII£ Z0/1£ ' -..._. I ' lD.2no n I L · SUSIIII~ J'JVfR 11100 1400 .]( ·----1 -AU.uYU,- -"AIIIai "1400 1300 •1300 a+oo o+oc HOO 2+00 3-tOO ·HOD 5+oo 1!+00 H·OC! GEOLOGIC SECTION E-E .Wf!m ALLWIU"' NOTES: <D (i) OIOIIITr IUITI:IDIOIUr:,;;;;.;;n DIOIU!l,IIIAIIOOtOftlfR (j) A4.TI'II(D DIO"ITIIII~IIUAriLY TO IIVIIIILY ALIIIIIJ\ ® IIIQNZOHIJ[ TO IIIANIT[ @ SECTION lOCATI0..-.1 IHOWN ott UHIIIT II. SURFACE PROFILE FROM 1" • 200' TOPOGRAPHIC WAP1 COli,~ M ENIIHEEitl,l171, fOil DETAtl!D IOIIEI.OU; DUCIUPTIONI, IU llii'LOIIATIOII LOll IN '"PfiiDIX A. FDft GIIOUNOWATE~ DATA S£( AI'PlHO!IC f. CHANllfS IN LITHOLOQY AilE iHOWN ORAPHICALl'l' FOil THICKNUIIU IIIUTEII THAN ~ ffET. STRUCTURE: (j) ALL DDIIEHOlES .All£ "'!O.IECTt:D. Ttllr IDENTifiED DlSTANCE IS TO iH( IDIIEHOL£ COLLAR I HUll ZDHE, 'ifiDTH I TO a I'~U ~ fiiACTUil£ ZDHE, WIDTH Ill( AT (II THA~ I fl!t:T fiiACTllllll: ZOIIl,WIDTH I TOll fEET CONTAtTS: ----TOfl M II:DIIOCIC OTHER: -'\/.-OIIOUIIDWATU UIU WITH DATA ,OINT, JULY .15,1114 -SHEAft fEATUIII: LUI THAN I flU WID£ }-AUUATIOII fUTUII£ IIIEAT£11 THAll .S fEET 11110( ~ PUWAfiiOIT INDICATED BY BOREHOLEs o 100 ·-_ :::!;,00 fEET SCALE E" --I ALASKA POWER AUTtiOAITY " ~ . ., .. ' --------..... ~U~TN_A HYI?A9~~~f!IC P~QL. WATAHA DAW AND IIEIEIIVOIII DOWNSTREAM PORTALS AREA GEOLOGIC SECTIONS 0-D,E-E,F-F .nl,.lJ1JU .. ~·,u.~-~ .... , ......... , ........ . • ..,.....,..l.t t IU !!: z 0 i= < > Ill ... ... Af;l.H •• •Iot4!4'-• W.l.A!:.r.A loA II Jlll.'r .l&at u.. .... """" ..a ..,.. .. ------ EXHIBIT 12 FY84 EXPLORATION PROGRAM n 11 rt fl OUTLET AREA -CONCLUSION fl f] r~ r~ ;in f,U ' . .. _, __ ·g l': ~ j .· fm j ) t ' ,.1 I l' t - tl [I I(! 0 r~ 50761.8 t 850410 t,_· I ·1.' -~~. .---;--.. _____ ,.,_.,.,.,.,.,. .. "L c ··,_ ·c.;l FOUNDATION CONDITIONS ARE SATISFACTORY: BEDROCK IS AT A DEPTH OF 0 TO 15 FEET THE STEEP SLOPES ARE LARGELY CONTROLLED BY STRESS RELIEF; EROSION OF SLOPES IS ACCELERATED BY FROST ACTION SHEARS AND FRACTURE ZONES ARE WIDESPREAD LOCALLY; APPEAR TO LACK CONTINUITY OCCASSIONAL MODERATELY TO SEVERELY ALTERERED ZONES EXISTENCE OF PERMAFROST IN THE LOWER ELEVATIONS <BELOW EL. 1750) OF THE NORTH ABUTMENT HAVE BEEN CONFIRMED; WILL AFFECT SCHEDULING OF GROUTING PROGRAM AFTER THAWING OF ABUTMENT {i n·. t . '.···1 • ' t: fl i . :'.I ~ [ . : l :f~ ~'fl ]I ' . ~:~ ' ' ( :w [fl !I ll ll I I FY84 EXPLORATION PROGRAM POWERHOUSE AREA -REVIEW EXISTING DATA 50761.9 850410 0 0 GEOLOGIC MAPPING CORE LACK OF OUTCROPS IN THE GENERAL AREA OVERLYING THE POWERHOUSE TWO BOREHOLES WERE DRILLED INTO THE ORIGINAL PROPOSED CHAMBERS APPROXIMATELY 500 FEET TO THE NW; ROCK CONSISTED OF HARD, STRONG DIORITE AND QUARTZ DIORITE WITH ZONES OF FRACTURING AND ALTERATION . ANDESITE WAS ENCOUNTERED IN THE UPPER PORTION OF BH-W4 .· ... ~. ¢~:~>J\ ~---· rr n ! .. ~~ I E f1. ~u FY84 EXPLORATION PROGRAM POWERHOUSE AREA -1984 DATA SUMMARY r~ ' ['~ ;il ~U ''II ;m c. J fl ' 1 :1, ·--' :~I ~ ..... . 0 0 . f'l' 507 61.10 I 850410 ~-· BEDROCK CONSISTS OF HARD TO VERY HARD~ STRONG DIORITE AND QUARTZ DIORITE WITH MINOR FELSIC DIKES RQD VALUES IN THE LOWER PORTION OF THE BOREHOLE ARE HIGH, ROCK RANGES FROM GOOD TO EXCELLENT, GENERALLY MASSIVE OCCASIONAL SHEARS AND FRACTURE ZONES WERE ENCOUNTERED LOCALLY; SLIGHT ALTERATION IS COMMON LOW LUGEON VALUES, 0.0 TO 0.4 GEOPHYSICAL LOGS INDICATE TIGHT FRACTURES AND HIGH DENSITY IN LOWER PORTION OF BOREHOLE GROUNDWATER LEVEL IS MONITORED AT TWO DEPTHS: ARTESIAN FLOWS OF Oe5 TO 1.5 GPM WERE ENCOUNTERED IN THE LOWER INSTRUMENT; IN GENERAL THE GROUNDWATER LEVEL IS 20 TO 40 FEET BELOW THE GROUND SURFACE 'rl <'! ' a lliili f1illj !1FXe ' .,. ' ~---"' . , ----~ rh·H :Iiiiii1 Jiiii ,,....r ....... ;: Ill Ill ~ z 0 t= <( > ... _, Ill HE ~ 2300 2200 2100 I I I l 11100-l I '"'l I I // i'--Si'E.MI Hll-0 ""j lliCO /1-.--~ .. ~·~ ~ALTERATIOft -SHEAII CLOSE TO V. U.OS£L Y FIIAC "~] 1·~~·-1300 IE4A 1.0 9$U H · SHEARS I -SI£AII z! ~ DH-11 IPROJ 40 fll DH-10 IPROJ. 40 FTI 'SHEAR ···-·AltEAATIOft -· St. 10 UOO AL IERI:D SIIEAII -FRACIUR£ ZONE MASSIVE DIORITE !•POWERHOUSE • El ti38P FOUNOATION LEVEL ---=-,, GEOLOGIC SECTION C-C ~· .~ SVI 2300 22DD 2100 2000 11100 1100 HOD 11100 11100 HOG- 1300 ;: .... w !!:: z 0 ;: < > .... .... .... If':·--~ ·~ ··: :.'1 ~ ~:· '" ····-~ ~ =:i ···:~ ~ -:-·~ -~),1 ~ ~ ............ ";:1 ~- ftOCI<: ~ ro:~ ~ e,u~4tf~ J • .fn!Ul OIOIIITI IUITEIDIOIIIfl,eiiAIITl DIOIIIT!,,II411100i0111TI ALrt:llfD O!O!IIT[tMIIIIIIIATILW TCI IIVfllll'l' ALTIII«D IIIICHIZOII:TE TO IIIIAIIITit STHUCTUIIE: IIIUII ZrMf,WIDtll I TO I H.!~ CONTACTS: ---- OTHER: -£- -JI«M Tllf' Of UPIIOCII HOUNDWATU TAll.[ WITH I!ATA POINT, .JIJN£/JULY 1984 flATUII[ LUI THAN I fEU WIDE ]-AlTIIIATKIM fUTUII[ iiiUTIII THAN ll ;'ffT WIDE NOTfS: (i) (i) (j) ® Ci> (j) (!) KCTII* LCCATIONI ai!OWM ON UHIIIT IZ IURfAC£ fiiOfllE FROtl I"• 200'10POGRAPHIC ~Mrt COIIPI Of [NIIN[[Jlt,IIU, fOil Dli':TAILED IOJI[IIOL[ DUCIIIPTIONI, IU Ul't.OIIATION LOlli IN A,(JIOiX A. fOil IIIOUJIOWAT£11 DATA UE ArPENOIX f. CIIANiilU 114 LITHOLOGY AilE IHOW~ lll.tPHICAI.LY fOil THICKNUSU IIIUT£11 THAN ISfi:ET. AI.L I(•III:HOUI AM l'fiO~ECTEO. THE lllt:NTifii:D DISTANCE 15 TO THE liOIIEHOLIE COLLAR THE HOlES f'DII BH •3 AND DH·II ARE WOOlf lEO fROW ACRES AWEfliCAII,l981, ·~-, ~ '::::J o ~o 100 FEU SCALE ,_. J =-..... .-.....:~ ALASKA POWER AUTHORITY ·!>ui.!t ;,"-11Yil!!9':l£\FICT';'"@'.i! cr:__ W.\TANA OAW AND ltiiEA\10111 POWERHOUSE AREA GEOLOGIC SECTION C-C )~lh~.t:a .. t!'tl.i....,.ii'\} ..... ,.,. ... ,...,", .. ,, ... 00.--"'. ·----·-------~ ... -P. ~u. tiHhAI~l ~l 4JI\ JUI.V IUU< n r_ 1·. l l { . fll P'• JQ ]I :1 11 ?il ~ I ,_ ----c-··· ·. ·· .... _--···--····· '•/ ,~. ~ ; ' . ' .. ,_ ,,, FY84 EXPLORATION PROGRAM POWERHOUSE AREA -CONCLUSION 0 50761.11 850410 PRELIMINARY RESULTS INDICATE THAT FOUNDATION CONDITIONS IN THE AREA OF THE PROPOSED POWERHOUSE CHAMBER ARE FAVORABLE ' '~~,..-· jJ • ll ll li If II I~ Ji w m t~l L DESIGN MEMORANDUM CONCEPT .. . . ' . . . . \ -. . _j i 1 I I I I l L r. ,. I' U. -., ' / r:' ~ ,: ~·· ! \ I l i ' i ! i 11 fl Jl .I I I I Puq~ose TASK 21 DESIGN MEMORANDUM #l GENERAL FY8 ENGINEERING & DESIGN BASE BUDGET This design memorandum presents the general plan for the design, construction, and development of the overall Watana Project. This report will serve as the review and approval document as well as a basis for the preparation of the more detailed design memoranda for the various structures and/or project features. Work Items Task 21 will support the engine~ring effort by preparing a design memorandum report which includes but is not limited to the following: Geotechnical Conceptual Studies Foundation Designs for Embankments and Structures Embankment Designs River Diversion Scheme Required Geotechnical Exploration Activities Laboratory and Field Testing Programs for Design Parameters Dam Freeboard Structural Conceptual Studies Spillway Design Power Facility Design Outlet Works Design Emergency Facil.~.,·~· Design 27613/21 850413 1 . ' . --... ... ,.,\.'"!';:'4,\1~~~,;.,.·!i!lil!l ~:t< , : ·r'i '(~··' . .. ' \ '· .... ; II fl I I ·I ! L,<-"_ I I I ... ~L·-................................... . ~ . . ')·~ (} '\ ' " ()- Hydrology Conceptual Studies Reservoir area -capacity Curves Sediment Storage Flood Control Storage Design Floods Tailwater Rating Curves Reservoir Regulation Mechanical Conceptual Studies Gate Type Powerhouse Equipment Electrical Conceptual Study Power Facility Equipment General Cost Estimates and Schedules Project Economics The precise number of studies to be accomplished will be determined as the conceptual design progresses. Direct Cost Direct costs cover air fare, travel expenses, relocation costs, u~e of computers, word processing, printing of the report, etc. Subcontract An independent panel of consultants to the Alaska Power Authority has been retained and will review the General Design Memorandum. Design Memorandum #1 will require work effort in FYs 198 and 198 • 27613/21 850413 2 Jl 1n ll I lB ll fl fl I I I I I Purpose TASK 22 DESIGN MEMORANDUM #2 -HYDROLOGY FY8 ENGINEERING & DESIGN BASE BUDGET The purpose of the Hydrology Design Memorandum is to present basic hydrologic data to be used in developing the conceptual and detailed design for the Watana Dam and Reservoir. Work Items Task 22 will support the engineering effort by preparing a design memorandum report which includes the following: Hydraulics Design Evaluation of Records Evaluation of Past Floods Extending Period of Record Analysis of Runoff Records Routing studies Final storage selection Design Floods Storms and Floods of Record Design Storm Development Spillway Design Flood Routing Wind Evaluations Reservoir sedimentation Reservoir ice modeling 27613/22 850413 1 -.) fl II ll ll tl II fl I tl I I I 1111 1 1 The precise number of . 1.ssues to be covered in Task 22 will be determlned as the design progesses. Direct Costs Direct costs cover air fare, travel expenses, use of computers, word processing, printing of the report, etc. Subcontracts An independent panel of consultants to the Alaska Po1wer Au.thori ty has been retained and will review the Hydrology Design. Memorandum. Design Memorandum fft2 will require work effort in FY 's 198 and 198 • 27613/22 850413 2 fiJ II ffl lfl I I I I I I I • > Purpose TASK 23 DESIGN MEMORANDUM #3 -GEOLOGY FY8 ENGINEERING & DESIGN BASE BUDGET The purpose of this design memorandum is to present a general summary of the geologic conditions in the area of the dam and reservoir. Emphasis will be placed on (1) nature and thickness of overburden, (2) stratigraphy alld structure of bedrock, (3) character of proposed foundations and excavations, (4) the groundwater and thermal conditions, and (5) geologic investigations to date, and those proposed to. complete the necessary geological studies in support of detailed design. More detailed geologic data pertinent to the embankment, spillway, power facilities, and outlet works will be presented in the design memoranda covering those features. Work Items Task 23 will support the engineer:tng effort by preparing a design memorandum which includes the following: Geotechnical Design Physiography and Topography Regional Geology Reservoir Geology Site Geology Foundation Conditions Seismic His tory Because of the need for addi tiona! foundation investigations, Design Memorandum 113 will require work efforts in FYs 198 _, 198 and 198 • 27613/23 850413 1 ,. ;! flf fll fl II ffl HI II II fl Ill I I II ll II -·~-t:.·~·.·· ----··-···-~--.. -.... _ .. _, __ Jl :Q.): _·;. ···:·.' \1' ,,. . ( '· ...•. ~ ' -.. \ '•" "~:_.:;-= TASK 24 DESIGN MEMORANDUM #4 -RIVER DIVERSION FYB ENGINEERING & DESIGN BASE BUDGET Purpose The purpose of the River Diversion Design Memorandum is to formulate and present the basic overall concept for handling river flows during Watana construction. Also covered will be the various aspects of the cofferdams and diversion tunnel design. Work Items Task 24 will support the engineering effort by preparing a design memorandum which includes the following: Geotechnical Design Cofferdam Foundation Design Cofferdam Embankment Design Diversion Plan Diversion Tunnel Rock Mechanics Design Structural Design Tunnel Liner Design Intake Structure Design Outlet Structure Design Hydraulic Desi~ Tunnel Size and Shape Pool and Tailwater Determinations 27613/24 8504!3 1 III fl !II I ....... , ~. ~¥" '• ··._,.:.' Gat. Design Intake and Outlet Mechanical Features The precise amount of work performed under Task 24 will be determined as the design progresses. Direct Cost Direct costs cover air fare, travel expenses, use of computers, word processing, printing of report, etc. Subcontracts An independent penel of consultants to the Alaska Power Authority has been retained and will review the River Diversion Design Memorandum. 27613/24 850413 2 . " I I I D I I ffil II Purpose TASK 25 DESIGN MEMORANDUM #5 -DAM EMBANKMENT FY8 ENGINEERING & DESIGN BASE BUDGET The pU'L':oose of this memorandum is to present the geotechnical data and the embankment design which will establish th.?. embankment slopes, slope protection, internal zoning, control of seepage, and slopes for the required excavations. preparation All of these form the basis for the of contract plans detail, and specifications. This design memorandum discusses . l.n soil and bedrock data, foundation conditions, embankment design and foundation treatment including grouting, earthwork usage, required excavations, observation devices, and a cost estimate of the recommended plan. This memorandum will be initiated in FY87 and completed in FY89o Work Items Task 25 will support the engineer:lng effort by preparing a design memorandum which includes the following: Geotechnical Design a) b) c) d) e) f) g) 27613/15 850413 Geology as it affects design Investigations Foundation conditions Construction Material Evaluation Laboratory Test Resu:l ts Design Parameters Embankment Configuration 1. il Ill I Ill I I lll I I I I I I I ,.~.-.-,_~.:.: .. '~-~: ~ tt . ~1 I • . \ ". h) Seepage Control i) Settlement j) Stability Analysis k) Freeboard Studies 1) Earthwork Usage m) Observation Devices n) Construction Schedule o) Cost Estimate The exact number of studies pe~formed in Task 25 will be determined as the design progresses. Direct Costs Direct costs cover air fare, travel expenses, relocation costs use of computers, word processing, printing of report, etc. 27613/25 850413 2 Ill HI Ill HI II ~I II I ~· I I I I Purpose TASK 26 DESIGN MEMORANDUM #6 -CONSTRUCTION l~TERIALS E'Y8 ENGINEERING & DESIGN BASE BUDGET The purpose and scope of this design memorandum are: ( 1) to present results of laboratory and field tests and other pertinent data regarding sources of construction materials; (2) to discuss the suitability of coarse a:nd fine aggregates, rockfill, riprap, bedding, filter and transition material, concrete mixing and curing water, cement, natural cement and fly ash; and (3) to evaluate each of the material sources. This memorandum will be initiated in FY8 and will continue through FY8 • Work Items Task 26 will support the engineering effort by preparing a design memorandum which includes the following: Geotechnical Design a) b) c) d) e) Geological affect on materials Availability and quality of filter, rockfill, coarse aggregate, fine aggregate and impervious materials Sources proposed for construction materials Sources not proposed for construction materials Cementitious materials Dire~t Cost Direct costs cover air fare, travel expenses, use of computers, word processing, printing, etc~ 27613/26 850413 1 # I 111 ~I 1'1 ll fll I II fl Purpose TASK 34 DESIGN MEMORANDUM 1f14 -SUPPORT FACILITY MASTER PLAN FYB ENGINEERING & DESIGN BASE BUDGET This design memorandum p7.:esents the criteria and data substantiating selection of the site fC",r each of the Watana support facilities. The Master Plan will servl!: as the basis for the design and contract documents as prepared by CIRI/Moolin and their subcontractors. Work Items Major support facilities for Watana are: D.M. 14 A Watana Camp Expansion D.M. 14 B Access Road (including Cantwell Staging Area) D .M. 14 c Construction Camp (Phase I and II) D.M. 14 D Airfield (Phase I and II) D.M. 14 E Operators Village D .• M. 14 F Reservoir Clearing The scope of work for the Watana Camp Expansion, Access Road, Construction Camp (Phqse I and II), Airfield (Phase I and II) and the Operator's Village (Permanent Town) will be defined in Design Memorandum 1F14. 27613/34 850413 1 111 lrt II ~I II I II I i I II I . :1 .• 1-~·. I ·nl.?:ec t Cost Direct Costs "'over "'l.. r f c a a~e, t~avel expenses, and printing of the report. Subcontracts In order to perform the necessary work H-E w'ill enter into contracts for drilling and surveying services. Design Memorandum :ff:l4 is a continua.tion of the work effort which began in FY8 • 27613/34 850413 2 r .i;:, t\:' ~ I I • l ~ • • • • ~ r l. . ~ ' ' "'II ' . . .... ' • .,. ' <-1 • , ' I , , -p ". v-"' . -• • "' '"' ' • '". • ~ • 1} • I • _. '\, _., ' • • . . . . •... -~ .••• ~ •. ~ ..• ,•¥ """·. 'jt~ ·~? 'lJiia ""'*·-~~ . . . -. . . . . •· -· ,.,.~ ·· ·-·q·---~-~~~'*"'"~ • •ra .,. natr ·Ill -r-ett·w nteerrt1tf~ t't r · a et.,..tnf r ·.~.·.· L • .· . ·f , h· ,b •~f...llk,.~,t:iitiwftir•rl'tett.;::'i!',~ e·w 57il iiiiiii •• &iii """'ii1 ""?i iifi'l iiTiil U9 S"'il s,..ii E"t5' i'fEill r'""i& F'il :"at ~ iSiaiJ 0 0 SUSITNA HYQROELECTRIC PROJECT WATANA DAM AND RESERVOIR DESIGN MEMORANDA CONCEPT THE DESIGN MEMORANDA WILL CONTAIN THE RESULTS OF DESIGN PARAMETERS AND STUDIFS STUDIES, ENGINEERING AND COST ANALYSES, DESIG~ CALCULATION SUMMARIES, SKETCHES AND DRAWINGS. THE INFORMATION WILL BE PRESENTED IN A MANNER TO DESCRIBE AND JUSTIFY THE FINAL DESIGN OF THE INDIVIDUAL PROJECT FEATURES AND COMPONENTS. THE REPORT WILL Bf IN SUFFICIENT DETAIL THAT CONSTRUCTION DRAWINGS AND SPECIFI- CATIONS CAN BE PREPARED AS APPROPRIATE. DESIGN MEMORANDA WILL ALSO BE PREPARED BY EQUIPMENT MANUFACTURERS UNDER PROCURE- MENT CONTRACTS. THESE REPORTS WILL FORM THE BASIS FOR THE EQUIPMENT PROCUREMENT SPECIFICATION AND PROCUREMENT DRAWINGS. M3710.1 850413 - 1 - ,·t_' ~ t""ll" .... ~~:·:;;:;-.-""}!!' ?~--vo;r~..__.:"';-~ZII!III!IIilllllllll•••••••---------- r' t ' c -"v • I ; • . '...-: . ..,... . ' • • • • • • • ( • It • ~ • / ---,_ .. -·~ ............ ' ",· ~, .~~:.~#' •••)Atil*' mr r, • ..,._ he,. ... +erw~M!e•»N ..... ,;;,r....,~N::;altn;;zL#·tt ":& •• :AW:~~4~~~,ii~. · ~ "; t!"":li . ·;:-' 52 !iiiiii !iiii1 filti ii iii . &a ttiiil &a ii?3tJ sr:n ra 55~i1! Fill ira 'ttEi1 ~1fi0. =iii». ~-· ;;;;;; ... *'. " ~'""~ t-.·. ~~ ' ... SUSITNA HYDROELECTRIC PROJECT WATANA DAM AND RESERVOIR SUMMARY LIST OF DESIGN MEMORANDA Jill. TITLE 1. GENERAL DESIGN MEMORANDUM 2. HYDROLOGY 3. GEOLOGY 4. RIVER DIVERSION 5. DA.V EMBANKMENT 6. GEOTECHNICAL CONSTRUCTION MATERIALS 7. EMERGENCY RELEASE FACILITIES M3710.2 850413 - 2 - HQ. TITLE B. OUTLET WORKS FACILITIES 9. RELICT CHANNEL TREATMENT 10. SPILLWAY 11. POWER GENERATION FACILITIES 12. POWER DISPATCH AND COMMUNICA- TIONS FACILITIES 13. GOLD CREEK TRANSMISSION LINE 14. PROJECT SUPPORT FACILITIES Li·•,:· ...._~---· . ,,1 'II 'it 'I 'I il 'I ;I 'I :I rl ;I .~I lli ~I L J- STAGED CONSTRUCTION CONCEPT _j n~~J ;1 ' ' to, lti ... ·~~~ 1'~"'1 m fifrii i TTI _..._, ....... ~-.... -,.._........_. .,_..., .. ~ ~~ ---... ~~ ......... -· ltli SUSITNA HYDROELECTRIC PROJECT STAGED CONSTRUCTION PRESENTATION . .......,__......,.. -~~ ~ ~ .. ! .-.: THE REASONS FOR PROPOSING STAGED CONSTRUCTION ARE: t.:2940.2 850311 EE2 9 0 REDUCE THE INITIAL FINANCIAL COMMITMENT OF THE STATE ALLOW MORE FLEXIBILITY IN MEETING LOAD GROWTH. iiii ' ~~~. --~ ~~~ .-t iiiii ll fl l I' I ~ ' f I ! ' ' ' i > • I -z--- \ '· ·, ' ' l I 1/ ' I '· ~ I \ ; "-..... ' ) ) I i I I . I I I I I \ \ I I \ \ '· \ . \ '. \ . i \ ) ~~ I /'~! . . ' \ \ I \ \ I i • ! II i •/ I! ~· 1: I II I I I II I !1 ' 'I \ I \ I \ \ . ' . - I " i/ J !I / If i I I ~ .-i :l j/j Ill I v' \ ' ' '\ ·\ :\ \() cc (0 ..... IN w -w ...... IN ' J ' ·~· .• '· I l ,~, . ~ ll ~ 'I ... rt Q • 'il e . ,I ~·- ~~ ~ k. II !I II t ' I' I z ..... c(O.. _,w a.O z ...10 c(CJ IXz Wo z-wt- (.) C!J::> :E~ c(CI.) QZ 0 c(CJ .zc c(W f-Cl ca:< ~~ I " "' / f \ \ / -z-- •' f , .. ~ I ; ~ i 1 • . \ ' . \ . I . \ \ ' \ \ I \ l I ~ I . \ \ \ \ I I ! I ' ; . i l . I \ l I . ' .. ,}, ,;r f I II Jl ! I II : I i/ \ I/ If II II -M . ' \ I I . I \l') a;) ..... N I -~--------------------------------~~ ---:L·.;·.:-·:··.~;·.··-....... . . ~ ' ' l ,.... w w }! r.'f \I . ';!· ,. I' 'I L ll ., '! ~ ., .. !J lL ~., ' k. II i. !I I I I EE 11 SUSITNA HYDROELECTRIC PROJECT STAGED CONSTRUCTION PRESENTATION CROSS SECTION THRU THE DAM STAGE I-WATANA INITIAL DAM RESERVOIR EL. 2185 y STAGE JI[-WATANA HIGH DAM n'""'t . ' ' .• " ... 2250 2200 2150 2100 .... 2050 ILl ILl &a. z ~ 2000 -t--< > ILl ..J w 1950 1900 1850 1800 1750 .. ~·-· " -..,. -· ·"'-~~.., .. ~ Iiiii ii i iiiii ~!6-.e........-. iliiiiii ~·'''"~ uii. :i~~~. RESERVOIR EL.2185'y DAM AXIS (WATANA INHIAL DAM) --1 35' ~--.~":'-n. ~ ~.V<::r:·::.":'1 ... .«'1!~.71<1';;::;-~·~..:--- r----1 --...£:EL.2027ll "7 ....... --~L.2015 RESERVOIR EL2000' y 0.7 NOTES : LINCLUDES 5' SETTLEMENT OVERBUILD 2.1NCLUOES 2' SETTLEMENT OVERBUILD -IMPERVIOUS 100' ---~ ·.--.-..~--) a= au .... _, u: UJ UJ I U) 2: ir -..... £A. 0 ol 0.1 iiii r~_¢;~-~~ --;..::.·~-t!~ ~ - 2188 ROCK-.. / OR ·--GRAVEL A1. A IN< A 1"0 WE A AUTtiORII Y ~~~-·.c·~~ ==-» ~~ H!!lf'O!iit IIIIo( ""''..tiC! .: WATAHA DAM ANO RESERVO .. STAGED CONSJRIJCTIOH -·-::-:::---=:::..,~: ·-- -·-· ~1'1111 ,., .... -----........... .. DAM ClllaT DETAila =· ~ cL((:~/) ~~. i r~ I ! i . . I -~/ ' "'t' ~~, t • • • • • • f • ' • -w • .. • ~ • • • t ,s.-• • • • ' ·. .· ' -~ I ~ . L"""'~-.,, ~· ... ,.,.. . ~.·. . . . . .;.';;·~ ··--------'""'-~,;,tJt,.,.,.,~lii rtlt .dft 1ill' tnt 1'6'!8te4uT W& ltWdk.:i.lilli'> All: *«rs4rn*o Me·u;;:4 7t#:t gay* l"trtr•w,:~illilllr ~~~~*'~"*' ;,~\..;:~~ wni ~lilmi EE a: ~" '" .... fJI""' ---_, ~. ··--~-·-__ .., ,__..... ,-.--"" •• , .......... _, .... ,~---'1--~-·-·· ~..-..--Jail~~ ... ~----~--•• 1/J".'~-~:--~ ---iiii ,,.,._,-_7:;-·· iii~~,~ I . i'iii SUSITNA HYDROELECTRIC PROJECT. STAGED CONSTRUCTION PRESENTATION WA T ANA SPILLWAY CROSS SECTION RESERVOIR El. 2185 t..-A FERC LICENSE CONCEPT <> --r•--e RESERVOIR--- EL. 2000 STAGE Jt: OGEE 4--a W AT ANA INITIAL DAM Ground Surf:•c• Groundi Surf act' A-A 8-B Jlliili •... , .... , ... ,.., =-· =- 1 ·._1 ! ' . ! ~~=-., -,~ .· . . . . . ' . . • . -... ·· . . ··---···· .~·· •.. .···'~!·' .. · ..•.. ~.~ •· •. -·.· ' . ~. •• .•• ,···· ...... "'iii;"!!' ...... -••••••.•••• h........ · . ...:~-~ . . · · ~~a+ .4tL~ui9i!!·r& • ..ca\..!,t&veJt#,~tt·41M .... • ~-.-----~~.E""""~-<ili.i:···');, ·14. ·~; ~ ~ iMi ~ fi;lfi fi1 •• il · s ~rai r iili f -j &IIi i1 wi '~~•· bj .ifiii ; .,, .• iiliil 'iMJj ani EE 9 e 211: . SUS;TNA HYDROELECTRIC PROJECT STAGED CONSTRUCTION PRESENTATION W AT ANA SPILLWAY RAISING -----------------------RESERVOIR El. 2000 STAGE 7 OGEE Ground ~ Surface ...1..-\ I ~8 WA T ANA INITIAL DAM RESERVOIR El. 2185 WATANA HIGH DAM r 8-8 -~~''·-~ ~ =-=- t SCALE': 1''= 200' I ;Jt2l85 EE 13 '· DEVIL CANYON GENERAL PLAN FERC LICENSE OR ST/iGED CONSTRUCTION ' •. -. .. . . . . , . . ~ --~ _, _____ ~ lii:r.e;;_.,,,.,illtQi:1o«tV'tif$ Cir* Ill: -1.: .•. -.·. M· ·. ··-·· ' . • ' ~ • _ ........ ; . ' . .. ;; -.... • , ' ........ ... if,. -. II; ~ .,..,.~ ~.. ,-· ' . ,...-~ ~· ......,_ '·· •• ~-' ' .• ' ·-'• ' . ' ' --f.l. rtntftw &· • .::~ ,..~~~··-., .... ..--~J'J:"!rSe, · ~6:As. ,;:;,.. & . mr·tL.BU*• .. .-.&.-...... , 'rt"'•"'it"t ""· j.: ;t~.:.i .. l!ifd~. -r----_--·-:_._1 ·.• I ~_ ; ' _.,. : r , --I ~ i ~- ~ i f ! ... ia-.... liM!iilliiiiiililitiiiilili .. iiiiiiiliiii-iifiiliilillllllillia\llllliiE=-!IIIIIIili==- SUSITNA HYDROELECTRIC PROJECT STAGED CONSTRUCTION PRESENTATION STAGED CONSTRUCTION TRANSMISSION LINES PRESENT STATUS ,,..,,..,.-•-(] FAIRBANKS I • I • HEALY WILLOW • I • 'OANCHORAGE •-•-LOCAL TRANSMISSION EXISTING I~TERTIE l .. ~1.r1 ~-~=~~~~~ ~ r~.~~~~M·~~~~~-~~~~~~~~~ . .-I . .. . . I I l j SUS:TNA HYDROELECTRIC PROJECT STAGED CONSTRUCTION PRESENT AT ION STAGED CONSTRUCTION TRANSMISSION LINES STAGE III GOLD KNIK . : I : I . : I : I • ,,,,,,,::'r-1 ~r..... iooL..J ~· ~· HEALY FAIRBANKS -----w«\DEVIL CANYON - - - -IIIIL..l .,.,,~,.,,.,,.,,.,.~4'\ W AT AN A ~~~.~..r, ..... , ...... , ...... ..,..~ ---• EXISTING INTERTIE .,..,,,,.4 W AT AN A If\'. T I A L DAM ·--• DEVIL CANYON ········• WATANA HIGH DAM n' " I ' l r' ~ ~ i ::; I J, . _ _:_:Ai ! I r j 'r i lliiiiii liiiiiil lliiii iJiiiili 5"51 &iii 1iiiilii liiiiili liiBii liiiiiiii -!!!1l!ll!i l!!!!llll!i l!!!!lllii l!!!lillli llliiiiili ........ .I!O!lllilli SUSITNA HYDROELECTRIC PROJECT ~ STAGED CONSTRUCTION PRESENTATION WATANA INITIAL DAM DEVIL CANYON WATANA HIGH DAM TOTAL COST DIFFERENTIAL M2670.4 850218 15 EFFECTS ON PROJECT COSTS . {$ MILLION 1982} FERC LICENSE N/A $1,469 $3,361 $4,830 STAGED CONSTRUCTION $2,559 $1,621 $1,160 $5,340 + $510 --.. liliilil iliiiiiii liiiiii iliiiiii i!Mii is;-; .... liiiiil liiiiii lil!i&il £ li:!.l lil!S!illl l!!!!i!ill 1!!!!!!1!1 l!!!!!iill J!!lfJilllj ~ (\,J 'i \'JJ ~· :(; i l' l I'll t!. I ' .. .. ._._,.._ -;-i: . . ·:--~--~-: ·;-"•·· .. I. 0 0 0 SUSITNA HYDROELECTRIC PROJECT -......... STAGEP CONSTRUCTION PRESENTATION ENVIRONMENTAL EFFECTS THROUGH STAGE I AND II LESS LAND INUNDATED MINOR CHANGE IN FLOW RELEASES THROUGH STAGE III LONGER DURATION FOR CONSTRUCTION WORK DISTURBANCE LONG TERM IMPACTS ARE EQUAL TO PRESENT PROJECT M2940.6 850311 E£19 m : ,, ?' $'@" liiil:lf.W.\..-a ;;<hi"'lfi<J.W.~=~U'L'' r ·1 .. ~ \ . . . . ! ~. 1 tnrii tiiiiii &iii &iii liiiii &iiii iiiiiiii 1iiiii l.iiiil liiiiiiii fiiiii ~ ~ i!!!l1 e!!!l E!!!!!li 1!!1Y1. ~ ~ 1980 FEASIBILITY STUDY WATANA: DEVIL CANYON: UU/1& SUSITNA HYDROELECTRIC PROJECT STA·GED CONSTRUCTION PRESENTATION 1990 PROJECT SCHEDULE CALENDAR YEAR 1995 ------!9UD S-ill§ . ------____ ....,.. ______ _ MANAGER PARTiCIPATI .. t .. LAND ACQl}~iJIQH .~~· _ ACCESS & SUP~1RT FACILITIES CONST. I ••• ··&' l ,. ~ 1 ~ KEV OATES & M-'V 1988 ~ OEC 1985 & JUN 1988 & JUN 1989 & OEC 1996 £ JUL 1992 fb. JU;. !i95 ~ SEPT 2002 & OEG 2010 EL 2205 :ADDITION (2 lHlS) £ f U ·i EE5 . ' -· trn Jr ..... ae·-· ... M" 'nettii:f" ·-r ., .... _ -~"· ,_ ....... ,. -"-~ . n:.-.:-: • . 1 . l :f i "! l I I 1 l " l ~' [ I i ? 1 ~ { -• iii i iiil . Jiiia .=.= ~ !!!!!!!!! ~ -- SUSITNA HYDROELECTRIC PROJECT STAGED CONSTRUCTION PRESENTATION COMPARISON OF CAPACITY AND ENERGY FERr LICENSE CONCEPT: Wi\T~WA HIGH DAM DEVIL CANYON STAGED CONSTRUCTION STAGE 1-WATANA INITIAL DAM STAGE 2-DEVIL CANYON STAGE 3-WATANA HIGH DAM M2940.15 850311 E2 INSTALLED CAPACITY <MW> 1020 600 1620 520 600 500 1620 AVG ANNUAL ENERGY <GWHR> 3500 1400 6900 2470 3120 1310 6900 I I -' ' • ,I • ··,·. • •' ' • I • : > # : • • • • • • • ... .:/:• ' • ,• ' ··-·· -·· •· ··· · ''lh·"·* ••'hi · ·G~ "·;.we~ · y..._ ••• ~· ·.· ,; 1-·. ~· .":.·"*'~· . 'It;~~..,. .. , ?i';;;,"""~ .... ·~·.Jif '+~&> ... '~.·:·. ·•. ·· ··· . < ··· ··. · ·· ·. .q ~">i~;&.,;,.,1 ---.--.-e<A_....,..._....,.<~< .ftt!a,. .. i"'cv._ ... ,. H~& t· ailia1i.t.--:r+ ._ .. _.&-. ...... L......_"Ij;_, ---• ·" .. ~~...-..~ ~--~ .. ~::.: .• .:m..i--~,.--r ....... 1:...1t~-L-· ·~-~~~~..-:~,;:..... .. ~-4.-4~~--~ .!_ ..... .L-~-~~:d-:lftlll ,, . "i f: J illlil ---.... liiiiili iiiiii -iiiil -fiiil == 1511 f!!l r!!!ll 1!!!!1 1!8 l!!!:!lil f!!!!il 1 'l . . . . .. ';· E 3\ ~ ~ SUSITNA HYDROELECTRIC PROJECT STAGED CONSTRUCTION PRESENTATION NON-SUSITNA AlTERNATIVE PEAK DEMAND AND CAPACITY 3000 r - I 2000 ~ I ' I Fkl·····,'···-·····.· .................. J I ·. •. . -: .. -.~ .. -?·.·~-· ••. ~._ .•..•. .c .. '· I NON-SUSITNA ALTERNATIVE (THERMAL) -.. -... . /:-·~·. :· .......... •.-:· ... .. . . . . . .~· ... ,l; . . . . . ~· v" . ""'' . I rG ' {; ra~::. #Is'::<::*R.:.;:·:!v;:·.~··::i4f :';.. .•. :p':. A· ..• ·;.,,·· · ., ... ·· ),.i;tWrn'&dt·· %\XtZJ·)/ ·. . ·.· • .•·. ·· .. ·.·.· ·• .-.. 1000 , 1 RAILBEL T PEAK POWER DEMAND Q. I J I I J 1984 ~nnn -------~ 19~£ 2000 2008 2016 2024 YEAR r-~ . > 11 ; l . ; I .. i t ~ ·- ·! l&iiiiiiii ~ ~ --~-·--== -~ ~ ~ ~ ~ ~ ~ ~ ~ !_._ ... ~ --.._ -B~B~· Ill'lllll'a' ~-.._., ~~ ~ tiiliiiillll ~ i!!f!l JSi1 ~ Jig E4 ~ ~ SUSITNA HYDROELECTRIC PROJECT STAGED CONSTRUCTION PRESENTATION FERC LICENSE CONCEPT-PEAK DEMAND AND CAPACITY 3 000 I ·-I I I I , 2000 FERC-- LICEINSE CON:CEPT I ·:·:·:·:·:·:·:·==·:·:·:·:-:-:-::::::r-:~:j:·'::r:!Y::!.!:.:-.!: e::; .. jfj;.. -.. !lljj]l\jjg\t~1lj~f:r:~::}~:::::y:: ·-:-: -· · L ~ ,:: ~:~; ~ :::~: ~ ::~:: ::: :::~::·.: :~.;:;: RAILBEL T PEAK POWER DEMAND ""·lliiJI ·:~:;: o& • .l. I I j 1984 ~-----~9Y2 2000 2008 2016 2024 YEAR ~~ ' "':.!"~"-~· ·f ·n··-~-~ ; . ! . 't .. ~I , I I I I . t ;, J :.:!j (. ':.:.! ' .f .. · r . f .. f I .I l fiiffi liil iiil iiii iiii &iii &iii •iii~ &a I"Hril ~ lfi.:! ~~· ~ ·-~ ~:,3 ~ ~ ... E 5 ~ ~ SUSITNA H''DROELECTRIC PROJECT STAGED CONSTRUCTION PRESENTATION STAGED CONCEPT-PEAK DEMAND AND CAPACITY 3000.--------.--------~-------T--------~----~ STAGED--.._ .. __ 2000 I I CONCEPT • • I. 1 1 f.:~~:tt:;:!:r:::::td J-•,:;::::::::•,J·:::,::,::::::::::::::·:;:::::::::::::•··-·:·:·:····: .. ~ .................. ·.······.a·--, •...• ) .. •• I ,. • ·••· .•.• .. · ·••···•••• ···········.:.:·:·:·.·.:.:.:·!·.·X·:·:·:·:•.·.· .;.:·:·:·:·:·:·.··:·:·:·s·····'· .•. ,1) ••• 1 . -* •• _._ ..... • •• _ ....... ·.~-~-: ......... ~.:->:·:~~~::::·:·~·~::~::· I I RAILBEL T PEAK POWER DEMAND 0· I J I I J 1984 1992 2000 2008 2016 2024 YEAR ~ ... i -~ ·~ ~·-.---........ ~· . . .• f"]!l --.... ~ ....... ,,., .. .....,.._,_y. • ! ........ 'lillllt . -... ! .. lllilllili#fawlliill ... iiii iiiii Jifii &iii ~iii ...... , ;a;~· ~ JW:sS 1. ?"':5I."' --. -·-lirl3 t:iili1 ~ ~~ {lt;;w;;..~ rr·IJ ~ ~ ~ --. - I \ ! l ! J ,, I f ~ ' ~~ () E 6 ~ ~ . . SUSITNA HYDROELECTRIC PROJECT STAGED CONSTRUCTION PRESENTATION COMPARISON OF PEAK CAPACITIES AVAILABLE 3000~------~--------~------~--------~----, STAGED CONCEPT ______, FERC LICENSE CONCEPT 1 0 00 I I I ! I I I RAILBEL T PEAK POWER DEMAND 0~------~--------~------~------~L---~ 1984 1992 2000 2008 2016 2024 YEAR •• ~,, :··:.: :~117~-;....B:;:.&;,"'.::!"~. •:-;:,,~ '.;:Yil~ii'":~·'i'6:-, .• -.7~-"::;7":~.C:.::::~:;'x"Z':-:' .. ~;:-=.,"',f,;;:;'"'~"·:::"''c::~·~·c;:-;.::;:~~;::··..,·· , ... ::--.'"'r':":~.~·c-· · :· -~~·"··· • ,,,.-. .. ~ ... ~ ·.···-:-e-··:'"·,--~·-·· ·--···-····~····· .. .............. t ·n-.. ···~:.·; ... ·l • . I ·. • J ·! I I i ' ! l ·~ i ~?'""; ' I l I I I ~ I .> I ~l I 1 •;cz liii iiiii iiiii liiii fill iiii &iii iFi TGi:l w:a ~rc:,a etil ~ •• illial ~ narn·~r• llil SUSITNA HYDROELECTRIC PROJECT STAGED CONSTRUCTION PRESENTATION ECONOMIC EVALUATION SYSTEM COSTS -WITHOUT SUSITNA -CUMULATIVE PRESENT WORTH SYSTEM COSTS -WITH SUSITNA -CUMULATIVE PRESENT WORTH NET DIFFERENCE IN FAVOR OF SUSITNA ALTERNATIVE BENEFIT/COST RATIO M2940.16 850311 Ell ($ MILLION 1982) FERC LICENSE $8025 $5481 $2544 1.46 STAGED CONSTRUCTION $802.5 $5685 $2340 I ! 1 .. 41 _, iiiil iiii iiiii iiiii 1iii1 &iii &iii ~ ii:ffi 1r:; ~ te!S teii!l ~ ~-iiii iUS iii~ 11i1 -: il SUSITNA HYDROELECTRIC PROJECT STAGED CONSTRUCTION PRESENTATION ECONOMIC ANALYSIS ($ MILLION 1982) CUMULATIVE PRESENT WORTH BENEFITS COSTS ,, FERC LICENSE APPLICATION PROJECT $5481 $8025 PROPOSED THREE-STAGE CONSTRUCTION $8025 $:;685 ONLY STAGE I AND II ONLY STAGE I ! l I I 'j ~·I ~f l . .,; I J._-~ I l :!f.l ~2670. 8 -.,. 50218 ' : 29 , . I .. ·I ~M:t~i~_.,.. ·•· ·a . .,.., . . . . -· • a ....,] tn·m nrs $8025 $6570 $8025 $7820 '"tilirikf~ iRS~ -:OJ.-.,_:s.: ... ....::-;c?f=.:;".:.r:---·-:.--:":-.'~-:7"~-:-:'"."''":':-~~~ -.... __ ...... ~ ............... -~ ..... -~-.-~ ...... --....,.,_~ .... ..-.... ....._.__..~_, .. ~.----~ NET BENEFITS $2544 $2340 $1455 $ 205 BENEFilf COST _RATIO 1.46 1.41 1.22 1.03 i n. ·.····i : I • i . ( I I ·-. ····4 t I ' I I [Ill (Jill r.m fiii lJliii [iii& uia ~ £ii.;§i t-:::::..:J [~~ r::3 r-. I·~ c---·~·· ["'"-'"l :~;-::J [-:-.::J c:-::J r::;·~~ ~ ··--......... ,.<,-~ ~ J --. . ' -~·, ~ SUSITNA HYDROELECTRIC PROJECT STAGED CONSTRUCTION PRESENTATION REVIEW P.DVANTAGES 0 REDUCTION IN WATANA INITIAL CONSTRUCTION COST 0 REDUCTION IN STATE CONTRIBUTION 0 TIMING OF RAISING WATANA CAN BE MATCHED TO ACTUAL SYSTEM LOAD GROWTH DISADVANTAGES 0 INCREASE IN TOTAL ECONOMIC COST OF THE PROJECT 0 INCREASE IN NOMINAL DOLLAR AMOUNT OF BONDS REQUIRED. 0 INCREASE IN POWER AUTHORITY LICENSING PROCESS COSTS TO PROVIDE FOR REVISIONS TO APPLICATION. M2670.11 850218 30 ·-~/~-·-·-X:.·. _,._, \..; --~·-, ~-~-, .... ;"~:71 .. ..... . _, . ~.. . . - J ·r-~-l~~~~~~[a i ~ . ~ . I i [i~ (Efi [i&7 ii Cia r::-..:::~ Gi&J [ :.i "-------1 [-----1 l ----:--] ~ ---~·--· ~--· L.~ ~ ~ 1 ' t i l .. ,, I ;-l ~ "'f 0 0 0 SUSITNA HYDROELECTRIC PROJECT STAGED CONSTRUCTION PRESENTATION ENGINEERING, ENVIRONMENTAL, AND ECONOMIC CONCLUSIONS STAGING SUSITNA PROVIDES A TRADEOFF <LESS INITIAL INVESTMENT VERSUS HIGHER TOTAL COST>. STAGING PROVIDES MORE FLEXIBILITY IN MEETING FUTURE POWER DEMANDS. STAGING PROVIDES FOR FULL EVENTUAL DEVELOPMENT OF THE SUSITNA RIVER BASIN CALL BENEFITS OF THE ORIGINAL PROJECT ARE AVAILABLE WITH STAGING)o o STAGING CAUSES NO SIGNIFICANT CHANGE IN PROJECT ENVIRONMENTAL IMPACTS. M2670.13 850218 31 > • <-"' ,:~, .. -.[~;;J l~~J I ¥'• ew=iii""'-"lf~!:c~::p;·:--r~~-:--c7;:,-;-~--:-:;--c:-:-c:-:o·:---:-::=:;=;;::=]F~:::=-:--. ~ .. :=~~-_-'-:":::::::::.~ . .::..:::::::::::-.:::.--:--=::::.:..::=~-. ,.c.-.-•.• cc_,-_,.. ~--~·-*•'"-''"" ·-·· · · • ., •••.. ,._ r·;.:J· ) ~ ~I . . u ,c; ~ J:j L FUTURE ENGINEERING EFFORT . . : ,~.~.' ' . i J ' l ~ i I 7 _j t • ~1 t . r• ·~ L. 'fi L., ~ ,J-1!1 Li .G L STAGED CONSTRUCTION '· l t i l I l ....... ------\--\--·y -\ l ;: j ~ ' . . . 1 .$ r ' ' .; i ' I i ~ ol I I ; i ; ; __ 1_ ~-r ! ,; J .. .. . -~ ~ • I ~ , ~ rw ' l • ; M • • ·--·--~-J 1-"' I~ ' ~ r1. . ~ .. a 2 0 1 0 :. ~ ~ ... \.) Ct: -:] ~ Qt ~ <( l-oJ J Vl L '2 .. 4 0 v \J ~ uJ u.. D. Cld w 1- \!) ;, Iff <! f 1- V) \J j ~ 1- ? ... 0 ~ II w _, .. v" a. ., G V) 0.. Ill J 1-l IJJ Cli ~ /l. ·----~----~=:j---~-1-_'_ '!~~":!· : » """ ~ ' " WATANA SUPPORT FACILITIES MASTER PLAN I /, I ! f I I 1 f { I I l: r' { ' j' m L.J 1111 J l PI L; ~ .......... ! ~ , ·i I I ~ l~-=-------7 - SU'SITNJ~ HYDROELECTRIC PROJECT fl J " '"-"" -..-c,.,., ...._,c ~ ~· .. --'"' ··~-· --· >~--.. --;; r-.,_;~ . <• • • >, , ,"' • . ., .. , • , ,., , , •·,c c..<, ,;,i'lifi ~ C ,,.,' >.if!:. ,.;;~;, Cl, ·:''V' ;:. /.... '\L·.;._;.'tft f.:,.::'!:; , -~~--~-~~ .~_...;:_. __ ""'-"'~ ·" ''!'&.w.:.r .• , •. i·.Qi£ '''"""'«:~~'"~'> .o;:;.J.ri'~•·~-4"'"lbioi·•;;\(.;J···>.·~~~ ~ ... ;~>.·-~-~;o,.;!J.g;JU»·~--..... c..~~~.-;.;'"• rlll'JIIEi L~ Ltill LtR ® 2.200 / rz,.OoO \~oo r~ .. d-~ c:-lil cr:a r~-­. __ .. f '"'~""''"1 __ ... [.:NM Ciiiiii r~ [----.-~ .~ lr~;.=.:;j .. ~~ SUSITNA HYDROELECTRIC PRO~JECT r····-c ;J ,~ .... -3 ,_:'";.;.;:..;;.. L'·- FERC LICENSE WATANA SUPPORT FACILITIES GENERAL LAYOUT r:--~ '--~""·~· . [~ [-~ TRANSMISSION LINES f'==\1) ~ ~ ·~--~ --~ I\) I\) q,q; I; ·~( ~ ~ ,soo PERMANENT TOWN , BORROW D TEMPORARY I I AIRSTRIP Y/~ ~r PERMANENT AIRSTRIP ~-"-d ?.000 ~----z 2200 -··-------. / 0 SCALE 1 2000 FT ___ __jf • ------" ...... ---·~··-··--~· ,_ -~---·--~ -.•-·•-'•• • """"'--;--·-••·-·~-·-·-~-~-·-· ·---,..,.,,M~~"'•-~---~·~--t"·---·--.>-::::-··~~~:------"~..:: ~ ·-:. .. :::~~~ ~--·~-.,..,--...-•'->--~-~---.... ~ --~~---··-~···•·--........ ~ ... ----;...-~-· ~-~.- [----·~·1 -~~:·"'-,fl D ~. _···: " '0 r~ '·· f;~. 't: ',.J ~.~~. ,tJ t *!r tl l IL c L WATANA CAMP EXPANSION .. _j I I j ! I I I· I I ! I l ! I~ I I I I I , I l l r i< ~ --. ! oO!; I' ' I '-1 t~,- r L FUTURE GEOTECHNICAL INVESTIGATIONS i I i : t' ' . I I i • i i If ' • i' I ). I :I .I '· ' I ~a .,0 ·~ -.~·L··· ...... :· --·.··· ... ,\ it 6/ . c ' 0 0 0 30371.0 50412 WATANA DAM AND RESERVOIR PREVIOUS GEOTECHNICAL INVESTIGATIONS RECONNAISSANCE INVESTIGATIONS BY CORPS OF ENGINEERS 1975 -RIVER CHANNEL 1978 -DA,MSITE BORROW AREAS FEASIBILITY INVESTIGATIONS BY ACRES 1980 -DAMSITE BORROW AREAS RELICT CHL\NNEL SEISMIC STUDIES 1981 -DAMSITE BORROW AREAS RELICT CHANNEL SEISMIC STUDIES - ACCESS ROAD 1982 -DAMSITE BORROW AREA RELICT CHANNELS LICENSING INVESTIGATIONS BY HARZA-EBASCO 1983 -RELICT CHANNEL MAIN FOUNDATION <RIVER CHANNEL) COFFERDAM FOUNDATION <RIVER CHANNEL> 1984 -FINS AREA POWERHOUSE AREA OUTLET AREA <FINGERBUSTER) c ' ' ~' -~ Jl ll ll l ' J .. ··-c· .............. ~ .............. . I •)'\'" ,,' -. , "• ,' ') ' WATANA DAM AND RESERVOIR GEOTECHNICAL INVESTIGATIONS FOR DESIGN DESIGN EXPLORATIONS WILL BE MORE DETAILED THAN THE PREVIOUS FEASIBILITY INVESTIGATIONS AND WILL VARY IN SCOPE WITH THE NATURE AND SIGNIFICANCE OF THE FEATURE. THEY WILL BE IN SUFFICIENT DETAIL TO DETERMINE THE FOLLOWING: 0 FOUNDATION CONDITIONS AND PROPERTIES 0 TYPE OF STRUCTURE BEST SUITED TO THE SITE o ALL CONTROLLING ELEVATIONS 0 0 0 30371.1 50412 APPROXIMATE FOUNDATION ELEVATIONS OF STRUCTURES ANY SPECIAL FOUNDATION TREATMENT CONSTRUCTION MATERIAL PROPERTIES GENERAL RESERVOIR GEOLOGY AND THE STABILITY OF THE SHORELINE ~ J _;I "J .J .l .,Q n ·~ ·-·E·····"·· .. ,.· .. ·· ... · ...... l ' . o' . <:, , ~ • w ~ -(/) > a:: a: < :::) 0 w .... -(/) ~ 0 a: a: 0 m UJ ...J ~ (..) "' -r- < .0 0 _, < z < ..... c( ~ ,I ] ] I .D 30371.2 50412 n .JJ WATANA DAM AND RESERVOIR GEOTECHNICAL INVESTIGATIONS FOR DESIGN CONSTRUCTION MATERIAL INVESTIGATIONS 0 BORROW AREA "D" AUGER HOLES CHURN HOLES TEST TRENCHES DRAGLINE TEST PITS 0 BORROW AREA "E•• DRAGLINE TEST PITS CHURN HOLES TEST TRENCHES a QUARRY AREA "A" CORE HOLES TEST BLAST 0 LABORATORY TESTING MOISTURE GRADATION- RELATIVE DENSITY COMPACTION TRIAXIAL SHEAR TEST LARGE SCALE TRIAXIAL TEST FREEZE-THAW L.A. ABRASION REACTIVITY COMPRESSIVE STRENGTH POINT LOAD TEST 0 INSTRUMENTATION MONITORING PIEZOMETERS THERMISTORS D 114 ~ ~ ~ ~ !~ .C ~ .0 30371.3 ~ 50412 . ~\.· ~·,~:-.. .· ~ i . .. ' i' I ·•.· • 0 WATANA DAM AND RESERVOIR GEOTECHNICAL INVESTIGATIONS FOR DESIGN DAM FOUNDATION INVESTIGATION~ -ABUTMENTS CORE HOLES <ANGLE) PRESSURE TESTING GEOPHYSICAL LOGGING INSTRUMENTATION TEST TUNNEL GEOLOGIC MAPPING IN SITU ROCK MECHANICS TESTING LABORATORY TESTING PETROGRAPHIC$ POINT LOAD TESTS COMPRESSIVE STRENGTH INSTRUMENTATION MONITORING PIEZOMETERS THERMISTORS STRAIN GAGES .. ,. --~'] .,, ~;;:;;~;;J#I~' :1 "-::r ~. ~~----J M I' ' ~ 0 D ~· ~ 0 .C ,C D rl 30371.4 ~ 50412 n 1J 0 WATANA DAM AND RESERVOIR GEOTECHNICAL INVESTIGATIONS FOR DESIGN DIVERSION TUNNEL INVESTIGATIONS · CORE HOLES <ANGLE> PRESSURE TESTING INSTRUMENTATION TEST TUNNEL(Sj GEOLOGIC MAPPING IN SITU ROCK MECHANICS TESTING . . LABORATORY TESTING POINT LOAD TESTS COMPRESSIVE STRENGTH INSTRUMENTATION MONITORING PIEZOMETERS STRAIN GAGES ' . ,_,. ~., ! r1 u M u 0 ~ . < ~ } I j,,, ~ ~ i 1 w ~ .LJ ,., lJ n ~ D ~ .U .C .C c ;c .D .0 n w r-~1 l I i.J 0 30371.5 50412 WATANA DAM AND RESERVOIR GEOTECHNICAL INVESTIGATIONS FOR DESIGN SPILLWAY AND OUTLET FACILITIES CORE HOLES <ANGLE) PRESSURE TESTS GEOPHYSICAL LOGGING . INSTRUMENTATION CHURN HOLES <OVERBURDEN> INSTRUMENTATION . . LABORATORY TESTING POINT LOAD TESTS COMPRESSIVE STRENGTH INSTRUMENTATION MONITORING PIEZOMETERS THERMISTORS INCLINOMETERS GEOPHYSICS SEISMIC REFRACTION l i, ... :,:;.;..-~;:s.J Cit.. , ,.,.;~ :~ ~~ • ' •• c< * ' i I~ ·-. ' ! D ~ ! '1 u ?m I l u M , I l..J n id c c 0 0 0 r'l t I 1 aJ ' I l,"·t·.·········· c ( .: : ''·t -~·· u ' {J • . <~"~~- 0 30371.6 850412 0 WATANA DAM AND RESERVOIR GEOTECHNICAL INVESTIGATIONS FOR DESIGN POWER INTAKE CORE HOLES <ANGLE> PRESSURE TESTS INSTRUMENTATION LABORATORY TESTING PDINT LOAD TESTS COMPRESSIVE STRENGTH INSTRUMENTATION PIEZOMETERS POWERHOUSE, SURGE CHAMBER, TRANSFORMER GALLERY CORE HOLES (ANGLE> ORIENTED CORE PRESSURE TESTS GEOPHYSICAL LOGGING INSTRUMENTAl IBN TEST TUNNEL GEOLOGIC MAPPING IN SITU ROCK ME~HANlCS TESTING LABORATORY TESTING POINT LOAD TESTS COMPRESSIVE STRENGTH INSTRUMENTATION PIEZOMETERS STRAIN GAGES r u ~ { ' w 0 0 D 0 D 0 0 0 0 f-1 30371.7 w 850412 .~~_.E········,··········.····· ' J ~ ) ' '. ·! .,. ·~ '' . -1 .v '~ ' WATANA DAM AND RESERVOIR GEOTECHNICAL INVESTIGATIONS FOR DESIGN LINEAMENT SURVEY DELINEATE WATANA LINEAMENT <IN RIVER VALLEY) REMOTE SENSING OVERBURDEN FOUNDATION CLEANUP GEOLOGIC MAPPING RELICT CHANNEL UPSTREAM ENTRANCE FACE TEST TRENCHES DOWNSTREAM EXIT FACE TEST TRENCHEs· THALWEG AREA CHURN HOLES PERMEABILITY TESTING INSTRUMENTATION LABORATORY TESTING GRADATION INSTRUMENTATION PIEZOMETERS PUMPi~G TESTS l ' ~::~ \) ""' \j .r : ~ .. · • -·.·.~.C.~ ... ••·. ···'··' -~---., '· , .• ~,. -~·•• ·::~•-·"--·~· . ··-·· ··•-·''·''"·'· <). -· • ~·,, ''' -··· . ·~--:, •• :.:>=•V·~·.•-"'--: • . /~J ··-•" . . . 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' l i ! II ! n lil i: I ll I, II • !. 1 li I I I fl .,. ' 1111111111 I 'j! I LLJ.~ll ' i ! Li j ~ J l Ill I H 1111111111111 i;' !, ·, I ! l ; 'j' . ; I I 'I! !,-j tl . t' I ! i l I I •! ; ' • l ' ' ' I ' 1 ' ! ' 1 j I ' -~ 1 tl I It' 1 ! ! !1 ~ I I ii.i j j fi I j f II il. i . j ' 1 ~ ;'.1 if!.! .fJJ! iJIJ l1 Jf. J lrJJ! ill;, , I Jtlllllllilt io; ' .. ' -1-++-++-1-++-+-~++-t+H-H-+++++++-1. .f+++-; ~ , H-+t-; , ; Hllllllllllll 11 I !IIIli r 111 rHHlllll ' 11 ~ : ; i j :Tlll t : J r J : ! 1 11 t ! t i 1 1 t 1 1 n 1 f 1111 1 i i 1 t i ; 1 1 1 11 i i 1 ' ' 1 t ' 1 ' ' 1 1 1 1 1 1 1 1 1 ' 1 1 , ' 1 ' 'I ~ i l ' H : il j ~T; ~ 1 rrrr ! : f1TITTT rrr-n i i : I1 r:r I i 11 n l l 1 l I i II [ t ! I ~ : ' H $ g I l ! i I ~ I ! ! ! II I l 'l' ,, I l ; ! ! I 1 I ~ l I I j I i II "" I . ' ' I • ' ' I ' ' i i " _LiJ. ' l .1 .1 : ' ! I f .. ' • ' • ' . I .,. . ! + " J ' ' ! j ' '~J·l l f ' I 'j' t' l' ; +-f.1 ! 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