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Home My WebLink AboutAPA3310! !, I , t I i I I I I I, i. i I I I ! rASK 2 -SURVEYS ANO SITE --~......._.-.-- FACiLITiES SUB'fASK 2.10 -ACCESS ROAD SePTtF.M6eR~9S1 SCHEDULiNG SUSITNA HYDROELECTRiC PROJECT ; i __AL/~SK.APOVVER J~U·r!40R fTY------- PROJECT CONSTRUCTaCNReQ·UIRE}\AE~JTS --_.._._-----,._'-....._----'--"--_.------. o ------------------------------~------------.-·-I I-"-l : ! I I I I I I I t I . I I j .... I i', ALASKA Po\iER AUTHORITY SUSITNA HYDROELECTRIC PROJECT PROJECT CONSTRUCTION REQUIREMENTS SCHEDULING TASK 2 -SURVEYS AND SITE FACILITIES OCTOBER 1981 ACRES AMERICAN INCORPORATED 1000 liberty Bank Building Main at Court Buffalo,New York 14202 Telephone:~~1l~525 Alaska Res<,urces Library &InformatlOn Services A.nchorage.AlllSka rt< P-i~S ..So N;;LJ '()o'33l () ·i~_I SUSITNAHYDROELECTRIC PROJECT ACCESS ROAD STUDIES PROJECT CONSTRUCTION REQUIREMENTS -SCHEDULING 1 -GENERAL The access road studies currently being undertaken are evaluated against various criteria.The methodology of the access road selection is shown in Figure 1. The evaluation is shown as step 5 of the methodology,along with the various criteria for evaluation.The one criteria this paper addresses is scheduling. 2 -SCHEDULING CONSIUERATIONS Access to site must allow for the orderly development and maintenance of site facilities and construction activities in order that first power can be brought on line in 1993. The various scheduling requirements to be considered are: (a)Schedule of Access Development - """o ~i (b) ~ ooo It) It)r-... (Y) (Y) __J:j This has been shown graphically on Figures 2 and 3 as schedule Plans A and B.Both schedule plans allow for an orderly development from limited access conditions through improved to full continuous access. Flexibility of Supply System The system of supply to the site should be flexible to accommodate the various requirements of work.The flexibility should allow for alternative means of resupply in the event of strikes,delays,and unforeseen circum- stances.Movement of people quickly to and from site in case of strikes, civil disruption and emergencies must also be allowed for. ARLI~., - 1 - Alaska Resources Library &InfonnatlOn Ser\lICe~ Anchorage,Alaska - - The Schedule Pl ans A and B show different types of access:1 imited,improved, continuous,and complete.The IIcompletell access is the final product.The 111 imited ll access would be extremely rough and allow only a 1imited number and type of vehicle travel.The Ucontinuous ll road would have all subgrade work com- pleted and would allow reasonable truck traffic continuously.A requirement of the project is that Il con tinuous ll access is necessary by mid-1986 to support the construction activities.The uimproved"access is better than Illimited "and not as good as ucontinuous". Schedule Plan A requires a "pioneer road"to be constructed.A Ilpioneer road ll , for definition,is a road which would allow 1imited access to several points along the permanent access road,to allow a rapid start and accelerated con- struction of the permanent road.The pioneer road would typically be a gravel surfaced road with turnouts;would be on existing ground,unless conditions made it absolutely necessary to place sUbgrade material or require excavation;and would have about 10 percent maximum grades and small radius curves.The pioneer road would generally have the same alignment as the permanent access road.How- ever,in many places it would have to follow another alignment to avoid any major excavation or fill work. A pioneer road at major river crossings would have temporary floating Bailey Bridges.These bridges would have to be removed in winter and temporary ice crossings built. Schedule Plans A and B have the following as key dates: 1.JANUARY 1,1985,LIMITED ACCESS REQUIREMENTS A.Mobilization of construction equipment and materials to build main access road. B.MObilization of camp buildings and facilities to support diversion con- struction. C.Mobilization construction equipment and materials to construct diver- sion tunnels. - 2 - -i i' - -~'i i: ,.... ! 2.JANUARY 1,1986,IMPROVED ACCESS REQUIREMENTS A.Supply of cement for diversion tunnel construction. B.Expansion of camp and facilities to support main dam contractor. 3.JULY 1,1986,CONTINUOUS ACCESS REQUIREMENTS A.Support of main dam contractor's activities. B.Development of camp and facilities to support other contractors. The preceding Schedule Plans A and B were developed during evaluation of the overall access plans.The schedule plans allow the orderly development and maintenance of site facilities and construction activities in order that first power be brought on line in 1993. One small advantage of a pioneer road is it could provide some support in the Phase II investigation and design of the project. 3 -ACCESS PLANS AND SCHEDULING The overall access plans are presented in Figure 4.Figure 4 also presents a summary of plans and technical points of the studies.Access plans 1,2,5 and 8,all of which originate from the east,the Parks Highway or Gold Creek,all require three to four years for complete construction.Access plans 3,4,6 and 7,all of which originate from the north and the Denali Highway,require one year to have an access to Watana. As stated above access plans 3,4,6 and 7,all of which originate from the Denal i Highway,can meet this requirement.Access pl ans 1 and 2,5 and 8 cannot meet this requirement unless a pioneer road is constructed prior to 1985.This can be accommodated in the alotted time frame.For access plans 1 and 2,5 and 8 the pioneer road would be constructed during 1983 and 1984.Detailed design and obtaining the necessary permits would have to be carried out during the last half of 1982 and the first half of 1983.This would allow the construction - 3 - , i,i f'i"i !, ! ,I -i of the full access road to be commenced in 1985 and the first half of 1986,with completion in 1987.The major bridge at Gold Creek would be constructed in 1985 and 1986,with access during this period being accommodated by a floating Bailey Bridge.A floating bridge would also be required at Watana or Devil Canyon dur- ing 1985 and 1986 depending on the road location. Access plans 5 and 8 would require construction of the permanent bridge at Devil Canyon to commence at the same time the pioneer road is started.For the bridge at Devil Canyon all necessary site work and the foundations would be complete by January 1985 to allow erection of the bridge in 1ge5 and completion in 1986. Access plans 2 and 8,which do not have a connection to a major highway,would have to bear an additional expense of transporting personnel in and out of the sites.By not having a connection to a major highway the option of having a portion of the personnel bear the cost of transportation to and from the site by private vehicle is eliminated.This shuttle expense is estimated to be in the order of $25,000,000 by air.Shuttle train service would be less expensive. Rail access plans 2 and 8 have a higher contingency risk than a roadway access. The risk is the possible loss of all ground transport and supply to the site associ ated with a breakdown of the rail system.Rail access does not provide the flexibility provided by a road access.A road access allows more control over the project by the contractors themsel Yes.A road access from a major highway is more flexible to adapt to different situations,thus lessening the risk of work delays,stoppages,and contractor1s claims.It has a Il safety valve ll the rail access options do not have. - 4 - 1 C--~-_]--1 'eCC__CCe )-::-:~:1 -i J r--~j --)---J r---::)1 ---~] __C) ~DEFINE OBJECTIVES lJ DESIGN PARAMETERS lLJ SCREENING PROCESS iJ PLAN FORMULATION -W EVALUATION SElECT ACCESS ROADWAY AND RAIL "fITHiITCAl 3 ROUTES ONE IN ENGINEERING ROUTE TO HYIlROPOWER ENGINEERING CRITERIA ---ECONOMIC ~EACH CORRIDOR ECONOMIC SITES THAT ALLOWS j ENVIRONMENTAL AS A RESULT OF ...-ENVIRONMENTAL CONSTRUCTION AND PUBLIC PREFERENCES THE SCREENING SOILS DATA SCHEOUllNG OPERATION WHILE ~J ESTABLISH CANDIDATES TRANSMI SS ION IMPACT PROCESS IN m ENGINEERING DESIRED LEVEL DF ACCESS BEST MEElI NG A TOTAL OF 33 ARE ESTABLI SHED ~CONSTRUCTION COST f--AGENCY CONCERNS OVERALL CRITERIA ROUTES ARE ~ J LOGISTICS COST TRANSMISSION STATED IN ffiJ ESTABlISHEIl TRANSMI SS ION IMPACT IN THE 3 CORRIIlORS t PORT FACILITIES ""'"'ENVIRONMENTAL 1-ROAD~'AY OPTIONS 2A PUBLIC PARTICIPATION RAIL OPTIONS PREStN!nlE OPTIONS f--LOGISTIC REQUIREMENTS ~LABOR ORGANIZATION ~ TO THE PU6L1 CANO 1 CONCERNS INVITE COMMENT. B PLANS.WHI CH ....f AGENCY CONCERNS t-UTILI ZED THE 3 ROUTES ARE ESTABLISHED HINDIAN COMMUNITY rINPUT - t.t PUBLIC INPUT ACCESS PLAN SELECTION METHODOLOGY FIGURE 1 [Ii J 1 ~~~l Cl c==]--1 1 )-1 1983 1984 U_HJ:~~ 1985 I 1;6 I 1987 I ACCESS TYPE 1.-r.......................-..~~.52,................................-:IMPRCNED CONTlNOUS COM LHED••••••••••••••••• SITE ACCESS PIONEER IlOAD INITIAL ACCESS IMPROVE COMPLETED........... \I,··I··,, •I ~I, I l, EXISTING STARTER I I CAMPS •.......................START STAGl:.n COMPLETE ,...............................................................................,·I •I \I ·,·I ·I,I,·.·,·I •,,, SITl:DEVELOPMENT ROADS TO IlIVERSION.PORTALS ,,., CONCRETE PLANT ,I CONSTRUCTION fACILITIES .,I • • ,.,.I , I I I ··,I ··,, I .'START ·, DIVERSION •TUNNELS Y~A~f~IJI..'CONCRETE NO.1 .::CONCRH NO.2 T • I I• I •••.......:COMP,kETE-COFFERDAMS 'PREP...H·~~~••,, I.START•flL)· MAIN OAM START .............EXCAVATE fOUNOAHON PlE!....................• DEVELOP BORROW SCHEDULE PLAN A SUSITNA HYDROELECTRIC PROJECT CONSTRUCTiON SCHEDULE ACCESS FROM PARKS HIGHWAY. fIGURE 2 1~lll ~.,~]>I '~~~]C~-l '~'C-'1 1 I ""1 ,..4 ~".,~'~'I "51 I I ACCESS TYF'E LIMITED IMPROVED CONTINUOUS COMPLETED ~.......-..............................~~.....-........••••••••••• SITE ACCESS INITIAL ACCESS I>lPAOVE COMPLETE··•··.·.·\\.I \•..•I \I.• CAMPS EXiSTING STARTER START STAGE II COMPLETE I......................................."'..................·.I·\·. \.... I I \I·I·. SITE DEVELOPMENT ROADS TO DIVERSION PORTALS I \I I.1·.·CONCRETE PLANT • I ·CONSTRUCTlON FACIUTES ·•:.I·• I .·.1 I I II,I I I,I ,I /~ill~~l ., , I ,I DIVERSION -TUNNELS EXCAVATkJr,f,.,'CONCRETE NO.1 '\CONCRETE NO.2/:i i •COFFERDAMS Jr........,j:J.Q~•••~t~R.~~~TE START MAIN DAM t START •••••........100 EXCAVATE FOUNDATION "'RIO!:...........~~ DEVELOP BORROW SCHEDULE PLAN B SUSITNA HYDROELECTRIC PROJECT CONSTRUCTION SCHEDULE ACCESS FROM DENALI HIGHWAY ~I fIGURE 3 j~111 --I I ~~-~~-~l ··~-l 1 ],-...._~--~J -~-,----,~f ~'-I ~~,~~~f r-·--<-J ~ SUSITNA ACCESS PLANS PLAN 1 2 3 4 5 6 7 8 <- DESCRIPTION:ROADWAY:PARKS RAIL:GOLD ROADWAY:DENALI ROADWAY:DENALI ROADWAY:PARKS ROADWAY:DENALI ROADWAY:OENAL I ROADWAY:GOLD HIGfIWAY TO OEVIL CREEK TO DEVIL HIGHWAY TO HIGHWAY TO HIGHWAY TO DEVIL HIGfIWAY TO HIGHWAY TO CREEK TO DEVIL CANYON &WATANA CANYON &WATANA UATANA,PARKS WATANA,RAIL,GOLD CANYON ON SOUTH WATANA,RAIL,GOLD UATANA,PARKS CANYON ON SOUTH ON SOUTH SIUE ON SOUTH SlOE HIGHWAY TO CREEK TO DEVIL SlOE OF SUSHNA,CREEK TO DEVIL HIGHWAY TO DEVIL SlOE OF SIJSITNA, Of SUSITNA Of SUSITNA DEVIL CANYON CANYON ON SOUTH DEVIL CANYON TO CANYON ON SOUTH CANYON ON SOUTH DEVil CANYON TO ON SOUTH SIDE SIDE OF SUSITNA.WATANA ON NORTH SlOE Of SUSTINA.SlOE Of·SUSlTNA.WATANA ON NORTH OF SUSITNA.NO NO CONNECTING SlOE Of SUS ITNA.CONNECTING ROAD COnNECTING ROAD SIDE OF SUSITNA. CONNECTING ROAD ROAD ON NORTH SlOE OF ON NORm SlOE SUSITNA.Of SUSlTNA. MILEAGE OF NEW ROAO 62 58 70 60 68 102 111 54 CONSTRUCTION COST ($x 1,000 000)158 140 151 119 143 179 209 93 MAINTENANCE COST is x 1,000,000)5 4 6 5 8 8 9 7 LOGISTICS COST ($x 1,000,000)215 210 231 230 214 230 231 214 TOTAL COSTlu...l_>.OOO ,000)378 354 388 354 365 417 449 314 _..- PERS~NEL StlUTTlE COST $x 1 000,000)0 45 0 20 0 0 0 45 CONSTRUCTION SCH£OULE (YEARS)3-4 3-4 1 1 3-4 1 1 3-4 -~_._-- MAJOR BRIOGES 2 2 0/1 0 2 0 0/1 1 SCHEDULE PLAN A A B B A B B A ADDEO CONTINGENCY RISK NO YES NO NO -WATANA NO NO NO YES YES -DEVIL CANYON FIGURE 4 rwi~ L "