| OCR Text |
Show through a vertical penstock to an uderground power- plant and exit through a 10- mile- long freeflow tunnel at Three Forks. Another reservoir at Monk's Hollow site, or the Tanner Reservoir upstream from Monk's Hollow, would " be required to regulate the flow into the Wasatch Aqueduct to limit the discharge into Diamond Fork to 600 c. f. s. This alternative would eliminate the need for rehabilitating the existing tunnel and the need for taking channel protective measures for a distance of 10.5 miles above Three Forks. Between k and 8 miles of new roads and 12 miles of improvement on existing roads would be needed for construction, operation, and maintenance of the facilities . The penstocks and pipelines would create scars similar to those of the proposed plan. Several alternative locations for the tunnels, aqueducts, powerplants, and diversion dams of the Diamond Fork Power System are available. Construction of the power system under any of the alternatives would have serious effects on the environment if proper analyses are not made in advance. Construction activities could be modified to avoid critical erosion areas. The hydroelectric powerplants would net cause air pollution and would not require significant storage regulation within the power system. In addition to the powerplants and associated facilities, a central switchyard, an interconnecting grid of powerlines between the powerplants, and transmission lines to distribute the power to load centers would be required for all power- system alternatives. ( b) Power- System Reregulation Reservoirs Water would have to be conveyed through the power system in the winter to enable it to have firm power capacity. Thus, all water conveyed from Strawberry Reservoir could be used to generate power and the resultant total power generated would be increased. The addition of Syar and Sixth Water Dams and Reservoirs would allow Sixth Water Powerplant to be used as a peaking powerplant, thus increasing its capacity. Under the proposed plan, four storage reservoirs along the Wasatch Front would store Strawberry Reservoir winter releases after power generation. These include Utah Lake, and Hayes, Sevier Bridge, and Mona Reservoirs. Sites on the main stream of Diamond Fork ( Fig. H- 19) have been investigated as alternatives to Hayes Reservoir 600 |
