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Show to 18 feet and gravel surfaced in some areas on the present alinement before construction was initiated in this area. The agency responsible for maintenance of the road has not yet been determined. A portion of this road would be relocated around the Syar Reservoir. The Forest Service, as part of its long- range plan, is considering extending the Ray's Valley Road up Fifth Water and down to Strawberry Reservoir. ( 2) Sixth Water Power Unit Corona Aqueduct and Sixth Water Penstock, Powerplant, and Reservoir constitute the Sixth Water Power Unit. Water from the Syar afterbay would be delivered by Corona Aqueduct to Sixth Water Powerplant Penstock. The aqueduct would consist of 3,800 feet of pressure pipe, 950 feet of pressure tunnel, and a surge tank 70 feet in height and 30 feet in diameter. After passing through Sixth Water Powerplant, the water would be regulated in Sixth Water Reservoir. The beginning of the aqueduct line may be reached from U. S. Highway 6- 50- 89 through Spanish Fork Canyon, traveling about 21 miles via the partially paved Diamond Fork road and portions of the unpaved Ray's Valley and Sixth Water Roads. A trail roughly parallels the aqueduct line from Ray's Valley to its terminus at Sixth Water Penstock. Sixth Water Powerplant would be connected to an adjacent switchyard and would be attended and operated manually. This feature would be located in the southeast part of the Wasatch Mountains on the Sixth Water tributary of Diamond Fork. Access would be the same as for Corona Aqueduct. The Sixth Water portion of the route would be improved for Bonneville Unit purposes. Materials exploration has not been completed for Sixth Water Dam. A cursory examination indicates that very little, if any, impervious material is located within the reservoir area. Most of the impervious material may have to be obtained from the bottom of Sixth Water Canyon downstream from the dam. Material removed in excavating for Dyne Aqueduct immediately downstream from the dam would be used in the outer zones. It appears that no good source of pervious material is available within the immediate area, so the dam embankment may have to be designed with the minimum size pervious zones required. This may take the form of processed sand and gravel filter zones between the impervious core and lateral zones constructed 69 |