PROJ00533 - Laserfiche WebLink

Home Browse Search

I I I I 'I I I I I I, I I I' I I I I I I 6. Store flows in excess of diversion demands. If there remalnlng in the river after meetin9 the direct diversion demand space is available, water could be stored in either reservoir. is flow and if In the base condition, there are two reservoirs on two sub-basins of the North Fork. The following operating criteria were established for the reservoirs: a) When there is water available for storage, store Lost Creek flows in Lost Park Reservoir up to the available streamflow amount or reservoir capacity. b) Next, store available water from the North Fork in Ripple Reservoir. c) The reservoirs are allowed to store up to the decreed amount one time per year. d) Evaporation of 1.58 feet per year was applied, amounting to a volume of about 1600 acre-feet per year. The simulation period started in January 1953 with the reservoirs assumed to be full. In the first runs under the base condition, no consideration was given to minimum streamflows other than the volume bypassed to satisfy the senior water rights. Later, base conditions were adjusted to reflect constraints in certain months. For the base condition in which no consideration was given to minimum flows, the maximum demand for storage occurred in late 1977 and early 1978 and required approximately 40,000 acre-feet of active storage capacity. The next phase of the operation studies concentrated on the selected alternatives with storage at Avery, Sawmill Mountain, and Warner Point. Avery and Sawmill Mountain Alternatives Both Avery and Sawmill Mountain are off-channel reservoirs located on Big Beaver Creek. The water diverted from the upper reaches of the North Fork would be that needed for storage and for supply to the agricultural and coal demands. When available, water for oil shale, municipal, and domestic demands would remain in the river for diversion downstream. V-9