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Show During construction, the outlet portal was reached from the adjacent old U. S. Highway 40, which has now been replaced by a relocated section. The inlet portal is reached from Highway 40 via an improved gravel- surfaced road along Currant Creek to Water Hollow and then 5 miles on a new gravel- surfaced road up Water Hollow Canyon. The material excavated from Water Hollow Tunnel was deposited in an area below the old U. S. Highway 40 which would eventually be inundated by the enlarged Strawberry Reservoir. The tunnel spoil area has been leveled, fertilized, and seeded. ( 21) Strawberry Reservoir Enlargement The nearly completed Soldier Creek Dam, about 7 miles downstream from the existing Strawberry Dam, will increase the present Strawberry Reservoir capacity from 283,000 to 1,106,500 acre- feet. This reservoir would be the prime storage facility for the Bonneville Unit, providing the necessary carryover storage for use in years of short supply. The maximum content would occur during periods of high runoff, and the minimum content would occur during periods of low inflow and high demands. Because of winter releases to other reservoirs in the Bonneville Basin, the yearly minimum content of Strawberry Reservoir would usually occur in March or April. Under a simulated reservoir operation, the reservoir would have emptied only once in the 40- year study period from 1921 to 1960. An artist's concept of Strawberry Reservoir enlargement is shown in Figure A- 12. About 18,950 acres of land were acquired or set aside for enlargement of the reservoir. This included the necessary lands for construction and recreational purposes. Of this amount, an estimated 4,285 acres were privately owned, 953 acres were Indian owned, and 13,712 acres were Strawberry Valley Project lands being used by the Strawberry Water Users. Ample borrow material for dam construction was available within the enlarged Strawberry Reservoir area. A riprap quarry of suitable quality rock was developed slightly downstream from the dam on the left side of the canyon. Concrete aggregate was obtained from the Moon deposit on Currant Creek and from a commercial source in Salt Lake County. Figure A- 13 shows the proposed recreational facilities, borrow areas, and waste disposal areas for the enlarged Strawberry Reservoir. 58 |