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Show c. Diamond Fork Power System Power development in the Bonneville Unit would consist of the Diamond Fork Power System, with three powerplants and associated waterways, regulatory reservoirs, switchyards, and transmission lines. Bonneville Unit water in Strawberry Reservoir and water of the existing Strawberry Valley Project would be transferred from the Uinta to the Bonneville Basin through Syar pressure tunnel, which would replace the existing free- flow tunnel. Approximately 197> 600 acre- feet of water would be released annually through the tunnel, including 6l, 000 acre- feet of normal yield from the Strawberry Valley Project. From the tunnel the water would descend about 2,000 feet through Syar, Sixth Water, and Dyne Powerplants, in succession, to the valley floor. Water released through the powerplants would be used mostly for irrigation, with some for municipal and industrial purposes. Figure A- lU is a sketch map of the Diamond Fork Power System. Figure A- 15 is a schematic presentation of the distribution of Bonneville Unit water in the Bonneville Basin. The Syar, Sixth Water, and Dyne Powerplants would have a total generating capacity of about 133,500 kilowatts. Part of the power produced at these plants would be used for Bonneville Unit pumping and the remainder for commercial consumption, with resulting revenues to be used to help repay Unit costs. Other features of Diamond Fork Power System include the Syar, Sixth Water, and Dyne Penstocks, Dyne and Corona Aqueducts, and Syar and Sixth Water regulatory reservoirs. The powerplants would generate an average of 319 » 500,000 kilowatt- hours of energy annually. Bonneville Unit pumping plants would require about 8,000 kilowatts of capacity at peak loads and an average of about 20,^ 00,000 kilowatt- hours of energy. The remaining power would be integrated with that generated at powerplants of the Colorado River Storage Project and sold commercially. Bonneville Unit power would be transmitted to points of use over an interconnected system of Federal and private transmission lines under contracts made for the Colorado River Storage Project. An artist's concept of the power system is shown in Figure A- l6. Physical data pertaining to the power system are shown in Figure A- 1T. Roads related to the power system are shown in Figure A- l8. ( l) Syar Power Unit Syar Power Unit would be composed of Syar Tunnel, Penstock, and Powerplant, and Syar Dam and Reservoir. Transbasin diversion of Bonneville Unit water would be accomplished through the pressurized Syar Tunnel, which would extend from Strawberry Reservoir to the Syar Penstock. The steel penstock would receive water from the downstream portal of Syar Tunnel and deliver the water to Syar Powerplant. Syar Powerplant and related features would be located in the 62 |
