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HomeMy WebLinkAboutBefore the FERC Kisaralik Hydroelectric Project 1980BETH 010 C-.. ;L BEFORE THE FEDERAL ENERGY REGULATORY COMMISSION APPLICATION FOR PRELIMINARY PERMIT KISARALIK HYDROELECTRIC PROJECT BETHEL. ALASKA PREPARED FOR THE ALASKA POWER AUTHORITY BY (@)ROBERTW.RETHERFORDASSOCIATES • CONSULTING ENGINEERS ARCTIC DISTRICT OFFICE OF INTERNATIONAL ENGINEERING CO .• INC. ANCHORAGE.ALASKA APRIL. 1980 APA18/F alea ------------Aq pazpo4lnV A8Vl.:l811 01 3SV3138 BEFORE THE FEDERAL ENERGY REGULATORY COMMISSION APPLICATION FOR PRELIMINARY PERMIT (1) The Alaska Power Authority applies to the Federal Energy Regulatory Commission for a preliminary permit for the pro·- posed Kisaralik River Water Power Project, as described in the attached exhibits. This application is made in order that the applicant may secure and maintain priority of application for a license for the project under Part I of the Federal Power Act while obtaining the data and performing the acts required to determine the feasibility of the project and to support an application for license. (2) The location of the proposed project is: State or Territory: County: Township or nearby town: Stream or other body of water: State of Alaska None Near Bethel, Alaska Kisaralik River (3) The exact name and business address of the applicant is: Alaska Power Authority 333 West 4th Avenue, Suite 31 A~chorage, Alaska 99501 The exact name and business address of the person authorized to act as agent for the applicant in this application is: Eric P. Yould, Executive Director Alaska Power Authority 333 West 4th Avenue, Suite 31 Anchorage, Alaska 99501 (4) The applicant is a public corporation of the State of Alaska, Department of Commerce and Economic Development. (5) The proposed term of the requested permit is 36 months. - 1 - APA18/F EXHIBIT 1 DESCRIPTION OF THE PROPOSED PROJECT (1) Proposed Dam, Spillway, Power Tunnel, Pm-Jerhouse, Tailrace, and Access Road Dam: The dam wi 11 be a non-overflow rockfi 11 type founded on bedrock. The rockfi 11 wi 11 have a maxi mum hei ght of 308 feet from e 1 evat ion 810 to ll18. The crest wi 11 be llOO feet in length and 20 feet in width with a 7-foot high concrete coping wall on the upstream edge to elevation 1125. The rcickfill in the dam, with upstream slope of 1.7h:1v and downstream slope of 1.5h:1v, will be zoned and compacted "in lifts with v'ibratory compactors. The volume of the rockfill will be 2,500,000 cubic yards. A concrete grout cap will be placed along the upstream toe to grout the rock joi rot sets. The dam wi 11 be sealed between the grout cap and the coping· wall "lith asphaltic con- crete pavement on the upstream face with an average thickness of 12 inches. Oversize rock will be placed against the down- stream face as required for earthquake stability. A 20-foot high cofferdam placed upstream from the grout cap will divert the river flow through the power tunnel during dam construction. The cofferdam will not be removed. A typical dam section is shown on Figure 1-1. Spillway: The probable maximum flood for the Kisaralik River has not been determined. For estimating purposes, an ungated side channel spillway at elevation 1110 with a channel width - 2 - ZONE 1I ",ATERIAL 18" MAX. SIZE Pt.ACE a COMPACT IN 2\ LIFTS W/4 PASSES I.IIH. 10 TON ViBRATORY COhlPACTOR. ELEY. SIO MAXIMUM DAM SECTION 2 ' 0" -'1 ~~x. W.S. ELI':V. "1.9 Ct.EAN BEORO:r-I , --:1 -. ·1 .1 TY?' COPlNG WALL SECT:ON ') a BAR W1I89" HOOl<S r1 GROUTEO 5"0' IN'1'P 8.R • ..J . PLACE BARS ZoO' EACH SiOE 01" GROUT PIPE "DIMENS'ONS NORMAL TO HEEL OF' DAM GROUT CAP DETAIL KISARA Lll< RIVER HYDROELECTRIC POWER POrENT/At. TYPICAL OAM SECTION. GROUr CAP a COPING WALL FIGURE 1 ~ I APAI8/F of 375 feet and a slope of 5% is expected to pass the probable maximum flood (PMF) before overtoppi ng the dam. The desi gn discharge of the spillway is 87,000 cfs. The spillway will be excavated in bedrock around the right (north) abutment of the dam and discharge into the side canyon downstream from the powerhouse. Power Tunnel and Intake: A horseshoe tunnel 650 feet in length and minimum rock excavation di ameter of 18 feet wi 11 1 ead from the powerhouse through the ri ght abutment to an intake structure located upstream .of the cofferdam. The tunnel wi 11 slope 0.020 downstream and be concrete lined to a finish diameter of 16 feet. The concrete power intake structure wi 11 be fl ared to reduce entrance losses and be provided with a trashrack, having slots.for an emergency closure gate. The gate operator will be located above the highwater at elevation 1125. The gate stem will be sealed in an oil-filled housing to prevent freezing. The downstream end of the tunnel will terminate in a trifurcation. Two legs of the trifurcation will be connected to turbines in the powerhouse for power gene rat i on and the thi rd used as a bypass during construction. The bypass will remain for future emergency drawdown. Powerhouse: The powerhouse will be an underground cavern approximately 100 feet long, 65 feet wide, and 60 feet high excavated in bedrock. Reinforced concrete will enclose the draft tubes and spiral cases. The turbine pit, turbine floor, - 4 - APAI8/F turbine floor walls and generator floor will be reinforced concrete. The walls above the generator floor and the ceiling will be unlined, natural rock; rock bolted and/or gunited as required for stability. Personnel and equipment will be protected from spalling rock with an aluminum alloy shield suspended from rock bolts in the crown of the cavern. The powerhouse will contain 2 vertical Francis turbines and generators rated at 15 MW each. An appropriate sized overhead travelling crane will be installed for erection and maintenance of the generating equipment. The tunnel and powerhouse are shown on Figure 1-2. Tailrace: Water will be returned to the river through a 22-foot diameter unlined tunnel approximately 225 feet long. Access Roads: There are no access roads to the site at the present time. A winter access road approximately 69 miles in length from Bethel to the project site will provide the means of construction mobilization and demobilization. A permanent road approximately 2 miles in l~n~th will b~ constructed downstream from the powerhouse to the concrete aggregate borrow area. A gravel airstrip will be constructed at the end of the road for project access with fixed wing aircraft. Refer to Exhibit 4 for location of access roads and the airstrip. - 5 - TUNNEL SECTION POWERHOUSE SECTION K1SARALIK RIVER TRIC POWER POTENTIAL H!DR~:LEC POWERHOUSE SECTiON IUNNt.L &-fIGURE 1-2 APA18/F (2) Proposed Reservoir Surface area-normal max W.S. Storage capacity (50 ft. drawdown) Normal maximum surface elevation Minimum water surface elevation Drainage area (3) Proposed Transmission Line Length Voltage Number of interconnections Conductor Size 6700 ac. 320,750 ac. ft. 1110 ft. 1060 ft. 544 sq. mi. 69 liti 138 kV 3 795.5 MCM, ACSR A substation at the powerhouse will transform the generated voltage of 13.8 kV to 138 kV. Utilization of 138 kV nominal voltage and a 795 MCM conductor will assure adequate voltage levels in Bethel. Energy losses will be low due to the relatively large conductor chosen. An overhead line will strike northwest for approximately 56 miles turning sharply northward near Kwethluk and cross the Kuskokwim River. The line will then strike southeast for 13 miles and terminate in a substation near Bethel. The transmission corridor will generally parallel the access road. Refer to Exhibit 4 for location of the transmission corridor. - 7 - APAI8/F (4) Energy Production From Proposed Installation Average annual energy production Number of turbines Rated capacity Number of generators Rated capacity (5) Project Lands 131,400 r~Wh 2 23,000 Hp each 2 15,000 kW each Land Status: The power-development site is presently located within the proposed Yukon Delta Wildlife Refuge (Federal Land Policy Management Act of November 16, 1978, Emergency Order 204E). The 204E withdrawal is valid for 3 years. The Kisaralik River is also considered under Emergency Order 204C, which has not been invoked yet. This order would withdraw the river and a 2-4 mile corridor along each bank for a period of 20 years and be more restrictive than the 204E order. If bills HR38 or S9 pass, the Kisaralik might also be included in the IIWild and Scenic River" system. The Kisaralik River flows across f~deral, state, and Native lands. Kisaralik Lake and the river downstream about 15 miles (west boundary T3N, R60W) are within lands patented to the State of Alaska. From there downstream about 67 river miles (west boundary T8N, R65W), the river flows through lands owned by the federal government and managed by the Bureau of Land Management. Both segments are proposed as a wild river. The remaining 25 miles of the Kisaralik River lie within lands selected by the Akiak Village Native Corporation. - 8 - APA18/F KISARALIK HYDROELECTRIC PROJECT Approximate Location of Project Boundary (Refer to Exhibit 4, Drawings 1, 2 and 3) Facilit~ Township* Transmission Corridor and Winter Acess Road (69 Miles) 8N 8N 8N 8N 8N 7N * Seward Meridian. - 9 - Range Section 71W 23 (Near Bethel) 26 25 70W 30 29 28 27 26 35 36 69W 31 30 29 28 27 26 25 68W 30 29 32 33 34 35 36 67W 31 32 33 34 35 36 67W 1 APAI8/F Faci1it~ TownshiE* Range Section Transmission Corridor 7N 66W 6 and Winter Access Road 5 (Cont'd) 4 3 2 1 7N 65W 6 5 4 3 2 11 12 13 24 7N 64W 19 30 31 32 6N 64W 5 4 9 16 15 22 27 26 25 36 5N 64W 1 5N 63W 6 7 8 9 16 15 22 23 24 5N 62W 19 20 21 28 33 34 * Seward Meridian. -10 - APAI8/F Facil it~ Township* Range Section Transmission Corridor 4N 63W 1 and Winter Access Road 12 (Cont/d) 13 4N 62~J 18 17 (Near Powerhouse) Dam, Spillway, Power- house, and Tailrace 4N 62W 17 Reservoir 4N 62W 10 11 13 14 15 16 17 20 21 22 23 24 25 26 27 28 33 34 36 5N 60W 22 27 28 29 31 32 33 4N 61W 4 5 7 8 17 18 19 20 29 30 31 * Seward Meridian. -11 - APAI8/F Facility Reservoir (Cont1d) 3N 3N * Seward Meridian. -12 - Range 62W 61W Section 1 11 12 6 7 8 9 10 13 14 15 16 17 18 APA18/F (6) Additional Information on Development, Conservation, and Utilization in the Public Interest of Regional Water Resources The Bethel area presently utilizes diesel generation exclu- sively and is experiencing very high increases in electric energy costs due to the recent escalation of fuel oil prices. Alternate developments have therefore been compared to the basic case of continued exclusive diesel generation. The most promising development plan has been found to be development of the hydroelectric potential of the Kisaralik River. It has been preliminarily assessed as feas'ible 'in regard to cost, capacity, environmental impact, and land status. The proposed hydroelectric site on the Kisaralik River has the potential to supply the entire future needs of the Bethel area through the year 2000. The energy from the project can be absorbed by interconnecting numerous small villages surrounding Bethel to a centralized power distribution point located in Bethel, which is in turn supplied via a 69-mile-long trans- mission line from the project. Over a 20-year period, assuming the project could go on-line in 1986, a savings of 255,000,000 gallons of diesel oil could be realized. -13 - APA18/F EXHIBIT 2 DESCRIPTION OF STUDIES CONDUCTED OR TO BE CONDUCTED WITH RESPECT TO THE PROPOSED PROJECT (1) General Requirement The proposed site was investigated during preparation of a study for the Alaska Power Authori ty by Robert W. Retherford Associates, Anchorage, Alaska, entitled IIReconnaissance Study of Ki.";aralik River Hydroelectric Power Potential and Alternate Electric Energy Resources in the Bethel Area ll dated February 1980. I n general, the proposed work wi 11 be performed, and the results organized, in a manner suitable for an Application for Li cense before the Federal Energy Regul atory Commi ss i on. The studies described below will be made to determine the technical, economic, and financial feasibility of the project, taking into account its environmental impacts. Appropriate measures will be exercised at all times during the field studies to prevent irreparable damage to the environment of the proposed project. All test sites shall be restored as closely as possible to their original condition to the satisfac- t i on of the Commi ss i on and the Bureau of Land Management. (i) Studies, Investigations, Tests and Surveys • Geological: A preliminary site inspection, for field evaluation of geology, soils, and geological hazards, was made in the summer of 1979. This -14 - APAI8/F information was used for the preparation of a pre- liminary appraisal of the suitability of the Kisaralik site for hydroelectric development. The findings of this preliminary geological appraisal indicated that a dam could be constructed in the proposed location. Further geological investigations will be made to support preliminary designs and cost estimates. These wi 11 i ncl ude cori ng at both abutments of the dam, at the intake structure, along the power tunnel, and in the powerhouse area. It is anticipated that approx imate ly two cori ngs wi 11 'be made on each abutment of the dam, two cori ngs at the intake structure, two corings along the tunnel alignment, and two cori ngs in the powerhouse area. Surfi ci a 1 geological sampl"ings will be used to confirm the orientation of bedding planes predicted from core drilling activities. Copies of geological reports, results of tests and analyses, and other information secured during these investigations shall be furnished to the Commission. • Surveys: The surveys to be performed will i ncl ude those necessary for preparing Exhibits J, K, and L and other appropriate sections of an Application for License. Surveys will be conducted by on-the-ground survey crews and by aerial photogrammetry. The ground crews will establish control and premark panel points fot' the aerial photogrammetric work, set permanent bench marks, make ties to geological investigations and prepare detailed topography of the principal features of the production plant. -15 - APAI8/F Upon establishment of ground control and setting of pane 1 s, vert i ca 1 aeri a 1 photography at a nomoi na 1 photo scale of 111 = 3,500' wi 11 be made duri ng the fi rst acceptable v/eather in the area. Fo 11 owi ng· acquisition of the aerial photography, topographic maps of the project area, including the transmission route and access road, will be made at a scale of 1" = 1,000', with a 20' contour interval. • Hydro 1 09i ca 1: Us i ng data synthes i zed from nearby drainage basins and existing climatological records at Bethel, an estimated discharge per square mile was prepared for the preliminary appraisal report. This information allowed for preliminary sizing of the dam, power tunnel, and turbi ne-generator capacity. A gauge will be installed at or near Lower Falls on the Ki sara 1 i k for the purpose of determi ni ng the stage and flow of the river. The design, location, and time of installation of the gauge, the rating of the station, and the determination of the flow of the river will be made under the supervision of, or in cooperation with Geological Survey. the river shall be the cognizant office of the U.S. Records of the stage and flow of kept for use in design of the project and will be made available, to the commission. The flow of the river measured at this station will be correlated with flows of comparable streams and with precipitation data to establish a synthetic stream fl ow record. Thi s record wi 11 be used for reservoi r operations studi es to confi rm the dam height, installed capacity, and other parameters. -16 - APA18/F • Reservoir Operations: Using preliminary hydrological study data, the drawdown duri ng the dri est peri od was evaluated to determi ne the mi ni mum dependable fl owrate, and thereby est-imate the prime capacity of the project. After refined hydrological information is developed, a computeri zed reservo; r ope rat i on study wi 11 be made. Pri me capacity, optimum dam hei ght, and optimum installed capacity will be determined. Economic constraints (including reserve requirements and operation and maintenance) will be evaluated and an installed capacity and combination of turbine- generator sets will be determined. • Project Structures: Following a review of preliminary geological, hydrological, and reservoir operation studies, the cost estimate for the dam, spillway, power tunnel, powerhouse, tailrace, and transmission 1 i ne (i nc 1 udi ng the wi nter access road), and the permanent access road from the airport to the dam site were prepared. During the period of the preliminary permit, refined cost estimates will be prepared for the project. This cost estimate will include engineering costs, interest during construction, and other intangible costs. Cost estimates will be prepared for alterna- tive sites. -17 - APAI8/F • Alternatives: Several alternatives have been evaluated for the preliminary appraisal report, generally on the basis of cost, environmental, and power generation potent i a 1. The a 1 ternat i ves inc 1 uded hydroe 1 ect ri c potential, coal and wood energy conversion, geothermal potential, wind potential, transmission -jnterties, and conservation. The Kisaralik River Hydroelectric project was selected as the alternative most suitable for development. A brief summary of the alternative development plans wi 11 be prepared. A summary of the envi ronmental impacts anticipated from the construction of the alternatives will be collected. Details regarding viable alternatives, including costs, feasibility, and power generation will be collected. • Economic Analysis: The project economic analysis will consider both annual cash flows and net present worth when se 1 ect-j ng the recommended development plan. Various development plans will be analyzed with respect to annual cash fl 0'/1 for capital and operating costs to identify those plans which can be supported by anticipated system revenues duri ng the earlier years of project operation. • Environmental Assessment: A general overview of potential projects in the Bethel area, to eliminate projects with heavy environmental impacts, particularly wi th respect to anadromous fi sh, wi 11 be made. -18 - APA18/F A detailed report, presenting the existing socio- economic status and flora and fauna in the project area, will be prepared. The effect of the project on man and the envi ronment wi 11 be evaluated and mitigative measures proposed. (ii) Access Roads: No new roads will be built for the purpose of conducting the studies. (2) Work Plan for New Dam Construction (i) Description of Activities: It is not anticipated that any field study, test or' other activity will significantly alter or disturb lands or waters in the vicinity of the project. It is anticipated that a BLM permit will be requi red for conducting thi s work. Fo 11 owi ng are the guidelines which the applicant intends to follow during the course of the field studies proposed above: Access for personnel and equipment will be by air, water, or on foot. There will be no road construction under this preliminary permit. • No trees over 6-inch diameter at breast height will be cut without prior authorization. • The tent camp will be ma"intained in a sanitary condit"ion. Burnab"le refuse will be burned in a fire-safe container. All unburnables will be placed ina sani tary 1 andfi 11 . All other materi a 1 s, wi th the exception of survey monuments and stream gauge, will be removed. This includes, without limitation, containers, tents, drilling equipment, etc. -19 - APAIS/F • No waste or by products wi 11 be di scharged into streams. Storage facilities for materials capable of causing water pollution, if accidently discharged, will be located so as to prevent any spillage into waters or channels leading into water. • If, during activities under the permit, items of substantial archeological or paleontological value are discovered, the area so affected will be vacated. Proper authorities will be notified and no further work in the affected area will resume until written approval is given. • The permittee will protect the scenic esthetic values of the area under permit, and adjacent land, as far as possible within the authorized use. Test pits will be backf"i1led to the original contour. Harassment of wildlife will be cause for dismissal of the offender. • Activities will be strictly limited to geologic exp 1 orat ion, core dri 11 i ng, surveyi ng and other items as they may pertai n to the gatheri ng of information for an Application for License to construct the project. -20 - APA18/F Cii) Permit Schedule ~----------------------------------,-----------~----------~--------~----~--~ [ ! ACTIVITY 1980 1981 1982 1983 rl -----------------------------------------------+-----------+----------4----------~ I I ! I I I t I I ! i I i : 1. 2. 3. 4. 5. 6. 7. 8. Geological Studies Surveying & Mapping Hydrological Studies Reservoir Operation Studies Project Structures Design Alternative Developments Economic Analysis Environmental Assessment Definite Project Report License Application .'--rn rn I I I rnrn rrrn s::: o .r- +> to U .r- OJ ,,- \f) r-i s::: OJ>, u~ .r-:J -I 'J +> .r- E -D :J (/) ~ 9. 10. 11. Reports to FERC I I I I I I I I I I I I I I i I I I I NOTE: All activities may be accelerated or modified within the 36-month period to conform with conditions encountered. ~ 21 - APA18/F EXHIBIT 3 COST AND FINANCING (1) Cost of Proposed Work Geological studies $225,000 Surveying & mapping 150,000 Hydrological studies 45,000 Reservoir operation studies 10,000 Project structure design 80,000 Alternative developments 20,000 Economic Analysis 30,000 Environmental assessment 175,000 Subtotal 735,000 Definite Project Report 80,000 License Application 20,000 Total 1835,000 (2) Source of Financing The applicant will receive funding for studies from State of Alaska general fund appropriations. (3) Proposed Market and Power Sale Revenue El ectri ca 1 energy is currently supp 1 i ed to Bethel and the surroundi ng vi 11 ages from a number of sources. The 1 argest single source of power is Bethel Utilities. The electrical load in Bethel is some 5 times greater than the combined total -22 - APAI8/F of all villages within 50 miles of Bethel. All electrical energy in the area is produced by diesel powered generators, and possibly a few gasoline powered units serving individual homes. Following is a tabulation of known village power sources. Location Size Ck\1)1 Owner l Akiachak 4 330 City Akiak 250 City Akolmuit 2 450 AVEC Atmautluak 50 Vi 11 age Corp Bethel 8400 3 Bethel Utilities Eek 206 AVEC Kwethl uk 4 125 Vi 11 age Napaki ak4 150 Napakiak Corp .. Napaski ak4 200 Napaskiak Power Oscarville Unknown Vi 11 age Tul uksak 4 Unknown Private 1 In addition to the units listed, most schools have standby generators or provide their own prime power. 2 3 4 Kasigluk and Nunapitchuk combined are often referred to as Akolmuit. Installing additional 2100 kW. From 1978 survey, Alaska Department of Energy and Power Deve 1 opment. There are no interconnections between these systems, with one exception. Kasigluk and Nunapitchuk are interconnected and are often referred to as Akolmuit. -23 - -' ... APA18/F The cost of power to be generated by the proposed project assumes a 1986 start-up date. A comparison of the cost of power from the proposed project with continuing use of diesel generation is as follows: Hydro Diesel Mi 11 s/kWh t~i 11 s/kWh Interest Rate 1986 2000 1986 2000 2% 211 114 162 323 5% 295 149 165 329 7% 365 178 168 334 9% 438 208 171 340 It is not anticipated that these rates will be charged to the consumer. The breakeven pO'j nt for di ese 1 vs. hydroe 1 ectri c energy will probably not occur until 1995. Some form of subsidized energy will be required until the project is capable of deriving sufficient revenue to meet the debt-service require- ments. The details of this subsidized arrangement have not been finalized. The applicant is, however, in a position to make the required arrangements. -24 - APA18/F EXHIBIT 4 MAPS Maps showing: 1) location of the project, 2) the relative location of pri ncipal project features, and 3) the project boundary, are attached as Exhibit 4. -25 - " l( :.=-~---'" THIS DRAWING IS A PART OF THE APPLICATION FOR PRELIMINARY PERMIT MADE BY THE UNDERSIGNED THIS ~ DAY OF APRIL 1980. , EXECUTIVE DIRECTOR n LAND STATUS STATE SELECTION ~ U.S.A. PUBLIC DOMAIN LANDS NATIVE VILLAGE AND REGIONAL CDR~ SELECTIONS THE PROJECT AREA IS LOCATED WITHIN THE PROPOSED YUKON DELTA WILDLIFE REFUGE. THE KISARALIK RIVER HAS BEEN DE SIGNATED FOR STUDY FOR INCLUSION IN THE NATIONAL WILD AND SCENIC RIVER SYSTEM. lin! I0Il .. O.E.P. A""OVtD ___ _ ALASKA POWER AUTHORITY BETHEL. ALASKA A.......,D ___ _ n' ______ 1 ALASKA POWER AUTHORITY owe NO. I DEli'. CitlCKED ICALE R.W.8 C.H.S. KISARALIK PROJECT PROJECT AREA GENERAL ARRANGEMENT PROJECT BOUNDAR I"· 250000 ~ INTERNATIONAL ENGINEERING COMPANY, INC FERC NO. EXHIBIT 4 SHEET I of 3 THIS DRAWiNG IS A PART OF THE APPLICATION FOR PRELIMINARY PERMJT MADE BY THE UNDERSIGNED THIS ~ DAY OF APRIL 1980. BY~_,? UJl \ , EXECUTIVE DIRECTOR N SCAL.E ior,'Ii_.-~_il-~_il-""ii_l-~_IiiOi1lllllllll""'lIII""''''';''IiiIiiIiiliiIiilii~1III'''''1III'''''1IIIIi1iiliiliiliiliilii~i NILlS Hitttl .WIO :5-21-80 ft O.E.P. ALASKA POWER AUTHORITY _D____ BETHEL. ALASKA ft ~------------------~------------------~ ._D ___ _ ft ______ 1 ALASKA POWER AUTHORITY DW8 NO.2 DE ..... R.W.B. CHECK~D C.H.S. acAi.l I' I MILE KISARALIK PROJECT PROJECT AREA RESERVOIR FERC NO. EXHIBIT 4 SHEET 2 of ~ THIS DRAWING IS A PART OF THE APPLICATION FOR PRELIMINARY PERMIT MADE BY THE UNDERSIGNED THIS ~ DAY OF APRIL 1980. BV<' o:~=-,-l_· --'C'C-1-"JJ='''-__ 1 EXECUTIVE DIRECTOR SCALEIO~ REVISION DRAWN 3 -27 -SO I' ___ O_'_P __ ALASKA POWER AUTHORITY AIItPItOYED ___ _ BETHEL. ALASKA ~-------I-------~K~IS~A;R~A~L~IK~;P;R~O~J~E~C~T~------~ A""OYED ___ _ ",------·1 ALASKA POWER AUTHORITY DWG NO.3 DE'.I.. R W B. CHECKED C.H.S SCALI: I": 1000' PROJECT FACILITIES DAM AND POWERHOUSE INTERNATIONAL ENGINEERING COMPANY, INC ~o .. ",. ~._ ... o .... uooc, ......... _ ·O..." .. ,,~""AlA"'._ """"" ,,"',w>''''' ",.£>02\\-"" FERC NO. EXHIBIT 4 SHEET 3 of 3