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Show U. S. Highway kO, During periods when the reservoir would be drawn down, this channel would he exposed. Its impact could be softened by rounding and shaping during construction so that it would blend with the reservoir basin. Disposal of material excavated from the tunnels in Round Valley would be a problem. Temporary disturbance of Main Creek would occur during construction. The powerplants and connecting pipelines would result in construction scars along the west edge of the valley for a distance of about 8 miles. Round Knoll Dam and Reservoir would inundate about 1,250 acres of meadow pasture and brushy sidehill lands. Main Creek would be inundated for about 2.5 miles. About 3 miles of road, telephone lines, and powerlines would need to be relocated. A reservoir fishery would be created; however, a water- level fluctuation of about ^ 5 feet from maximum to minimum elevations would occur. This reservoir could be held at a high level during the summer recreation season by coordinating its operation with that of Deer Creek Reservoir. Releases from Round Knoll Reservoir would increase the flows in Provo River resulting in minor fishery and recreational values down to Murdock Diversion Dam. From the diversion dam to Utah Lake, these flows would benefit the river fishery considerably. This would be especially true for releases to Utah Lake during the irrigation period, when the river has been dewatered historically. The pipeline from Provo River to the Wasatch Aqueduct could leave a construction scar along the Wasatch Front for a distance of about 27 miles. Travel and utilities would also be disrupted during the construction period. Releases through the Round Valley system would eliminate the need for increased flows in Diamond Fork that would have occurred under the proposed plan. The Round Valley alternative would eliminate the Diamond Fork Power System and a portion of the Wasatch Aqueduct from the Dyne Power- plant site in Diamond Fork to the Goosenest area south of Spanish Fork, along with the associated environmental impacts. ( 2) Transbasin Diversion to Hobble Creek ( a) Description of the Alternative Under this alternative plan ( Fig. H- 1T) » water would be diverted to the Wasatch Front from Strawberry Reservoir 591 |