OCR Text |
Show to maintain a trout fishery below Soldier Creek Dam. Data published by the Forest Service10" indicate that measured recommended flows for upstream stations would be very similar for downstream stations. The Bureau of Reclamation stream studies indicate that a flow of 12 c. f. s. would be attained, under Unit conditions, at a point about 16 miles below the dam. This means that about 14 of the 30 miles of stream between Soldier Creek Dam and Starvation Reservoir will have more than the recommended minimum flow. This recommended flow would not be attained in about 80 percent of the 20- mile " quality fishing" section of the river. Under Unit operation it is not likely that the " quality fishing" status would be retained. The Class II fishery status of this section would also be adversely affected and would likely have to be lowered after post- Unit evaluation. Upper Provo River Figures C- 7 through C- 9 depict both the typical seasonal streamfloxtf pattern that presently exists and the pattern that would develop in the upper Provo River as a result of full utilization of water developed by the Provo River Project and the Bonneville Unit. Present population projections indicate complete use of these flows would not be required until about year 2000. During the nonirrigation ( late fall and winter) season no significant changes in flow, between the head of the river and Jordanelle Reservoir, would be expected to occur. Winter inflows in excess of 50 c. f. s. at Jordanelle Reservoir and 60 c. f. s. at Deer Creek Reservoir would be stored in the reservoirs through the following exchange process. Provo River natural winter flows in excess of the minimum releases destined for Utah Lake would be withheld at Deer Creek and Jordanelle Reservoirs. Replacement to Utah Lake would be accomplished by releases of Unit water from the enlarged Strawberry Reservoir, Unit return flows, and savings in evaporation in the diked lake. Bonneville Unit water in Deer Creek Reservoir would then be exchanged to Jordanelle Reservoir by withholding imported water scheduled for delivery to Deer Creek Reservoir. The 50- c. f. s. minimum flow below Jordanelle Reservoir 327 |