OCR Text |
Show scar of 25 acres. Cattle and wildlife such as deer would be affected by inundating from 3,000 to 3,600 acres of grazing land in the reservoir area under alternatives ( l) and ( 2). ( 2) Provo River Plan An alternative plan was considered for diversion of a smaller quantity of water to the Bonneville Basin via the Provo River involving only Rock Creek and the South Fork of Rock Creek in the Uinta Mountains. Upper Stillwater Reservoir, the enlargement of Strawberry Reservoir, and most of the Strawberry Aqueduct would not be required; however, additional storage would be required on the Provo River. Under this alternative plan Starvation Reservoir on Strawberry River and a feeder canal from Duchesne River would still be required to meet the late- season needs of irrigable lands along Duchesne River. However, Starvation Reservoir would have been smaller in size with the Provo River plan than with the Strawberry Reservoir enlargement plan because of the smaller diversion that would occur. A much smaller diversion dam, rather than a storage dam, would be constructed at the site of Upper Stillwater Dam on Rock Creek. Flows of the South Fork of Rock Creek would be diverted at Docs Diversion Dam and conveyed in Docs Feeder Pipeline to the Upper Stillwater Diversion Dam. The Rock Creek Aqueduct, consisting of two tunnels 9.6 miles and 8.7 miles long and a 0.5- mile- long siphon crossing the Duchesne River, would convey water from the Upper Stillwater Diversion Dam to the Provo River. The outlet would be about U. 5 miles below the outlet of the existing Duchesne Tunnel of the Provo River Project. This plan differs from the proposed plan as follows: ( l) less water could be diverted, ( 2) economical long- term carryover storage sites comparable to Strawberry Reservoir are not available along Provo River for the magnitude of storage required, ( 3) this route is not as well adapted to hydroelectric power production, and ( k) flood problems along kO miles of the Provo River channel which would carry the diverted water would be compounded. 587 |