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I I I I I I I I I I I I I I I I I I I .t.'" ().... 1 ;j , ':f IV. REPORT ON OPERATIONS DURING WATER YEAR 1989 A. Ruedi Reservoir Ruedi Dam is located on the Fryingpan River on Colorado's western slope. The reservoir provides replacement storage for out-of-priority depletion by the Project. Additional storage water is available for sale to meet irrigation and municipal and industrial water needs in western Colorado. The reservoir has a total capacity of 102,300 acre-feet. The spillway on the right abutment is uncontrolled with an ogee-type crest and has a total release capability of 5,500 ft3/s. Storage in Ruedi Reservoir at the beginning of water year 1989 (September 30, 1988) was well below capacity at 87,760 acre-feet. On October 1, the reservoi r release was set at 110 ft3/s to accomp 1 ish winter drawdown. This release rate was maintained until August 30 when it was increased to 140 ft3/s. The maximum daily release occurred on September 30 at 167 ft3/s. The maximum reservoir content reached during the year was 97,380 acre-feet on August 6. Maximum inflow for the year of 410 ft3/s occurred on May 23. The inflow sloWly declined to approximately 20 ft3/s on September 30, 1989. During water year 1989, requests were made for releases of stored water by two storage contract entities. Total release for the two storage entities was approximately 107 acre-feet. West Divide useage was about 3 acre-feet, and Basalt Water Conservancy District used 104 acre-feet. Both entities called for their releases from July 19, 1989, through September 30, 1989 (table 1). In addition to the releases for the two storage contract entities, a release of 10,UOO acre-feet was made from August 30, 1989, through October 15, 1989, to the U.S. Fish and Wildlife Service and the Colorado River Water Conservancy District for the enhancement of endangered fish in the Colorado River's "15-mi le reach" just below the Grand Valley Diversion Dam near Grand Junction, Colorado. The content on September 30, 1989, was 89,720 acre-feet. Exhibits 1 and 2 show the precipitation and pan evaporation at Meredith. Table 2 and exhibit 3 show the operations of Ruedi Reservoir during water year 1989. B. West Slope Collection System The Project imports during water year 1989, as measured at Charles H. Boustead Tunnel (Boustead Tunnel) outlet by the Colorado Division of Water Resources, reduced by Busk-Ivanhoe imports through Boustead Tunnel, were 36,170 acre-feet (see tab le 3). The April 1 forecast of available imports for April through July was 49,200 acre-feet. 3