| OCR Text |
Show southeast part of the Wasatch Mountains on a broad saddle separating Fifth Water and Sixth Water tributaries of Diamond Fork. The proposed penstock line traverses a moderate slope from the downstream portal of Syar Tunnel to the Syar Powerplant. A surge tank would be located near the Syar Tunnel outlet portal. Syar Reservoir, formed by a dam 80 feet high and a low dike, would serve as an afterbay. The Syar Powerplant would be situated on the northeast bank of Syar Reservoir and would develop the potential head differential of about 350 feet between the Strawberry and Syar Reservoirs. It would be connected to Sixth Water Switchyard by a 138- kv line. The Syar plant would be operated by remote control from Sixth Water Powerplant. Access to the potential damsite is via a partially paved mountain road which follows Diamond Fork Creek from its junction with U. S. Highway 50 up the canyon to the junction of Spring- ville Crossing and Ray's Valley Road, thence to the damsite via Ray's Valley Road. The site is 22 miles from U. S. 50 via this route. Rights- of- way for the Syar Power Unit would be on public lands within the Uinta National Forest. The inlet portal of Syar Tunnel in the Strawberry Reservoir would be under water constantly, making excavation difficult from the inlet end. For this reason, Syar Tunnel would probably be excavated from the outlet portal end. Excavated material amounting to approximately 100,000 cubic yards would be used in the outer zones of the dam and dike at Syar Reservoir. The construction road to the tunnel outlet would be located so that it would be hidden from every direction except the south. A permanent operating road would be required for access to the outlet of the tunnel and the head of Syar Powerplant Penstock. Therefore, the construction road would also be designed as a permanent operating road and thus avoid creating two construction scars. Materials exploration has not yet been completed for Syar Dam. It is anticipated that the material required can be found within the reservoir basin. Flagstaff limestone outcrops along Fifth Water Creek provide a potential source of riprap. Concrete aggregates would be obtained from commercial pits near Spanish Fork. Ray's Valley Road, which provides the existing access to the outlet of Syar Tunnel and Syar Reservoir, would be widened 68 |
