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. . . 1.' " If ., 'J '1 ""'1. Reservoir Storage Allocation Data Table 8 presents the reservoir storage allocation data for the five reservoirs in the Fryingpan-Arkansas Project. J, Flood Control Benefits During water year 1982, there were three cx::=rences in which Pueblo Dam was used to control flow in the Arkansas River. The first occurrence was on JUne 5-6 when flow in Fountain Creek could have put the flow of the Arkansas River at Avondale above the safe channel capacity. The release fran Pueblo Dam was reduced fran 1,500 ft3js on June 5 to 740 ft3js and remained at this flow for IlOst of the day on JUne 6. The second oc=rence was on July 29 with high flows in ooth Fountain Creek and the Arkansas River below Pueblo. The storage in Pueblo Reservoir increased by almost 6,000 acre-feet fran midnight July 28 until 6 p.m., July 29. Releases were about 1,480 ft3js when regulation started on July 29. The flow was increased to 3,760 ft3js but had to be reduced to control the river flow. The minimum flow was 610 ft3js. The final oc=rence was on August 20-21 when the storage in Pueblo Reservoir increased almost 7,000 acre-feet fran 8: 30 p. m., August 20 until midnight August 21. At this time the Arkansas River at Avondale was approaching 8,000 ft3js with Fountain Creek over 4,000 ft3js. The flow fran Pueblo Dam was reduced fran 1,960 ft3js to 410 ft3js. The U.S. Corps of Engi'1eers estimate the flood control benefits to be $836,000 as a result of these reservoir operations. Table 9 shows the flood benefits received since construction of Pueblo Dam. IV. OPERATION PLAN FOR WATER YEAR 1983 A. General The IlOSt probable condition of water supply has been considered for use by the available facilities of the Fryingpan-Arkansas Project, according to established operating criteria under assumed conditions of inflow. Changing conditions may require adjustments to the proposed operating plan. Forecasts of the April-July runoff will be initiated in February 1983 and continue during each succeeding IlOnth through May. These forecasts are based upon the Soil Conservation Service's IlOnthly snow survey, normal precipitation for the remainder of the season, and historic runoff patterns. The contract with Southeastern Colorado Water Conservancy District requires that by April 15 notification be given to the District of the quantity of water that will be available to then through April 30, 1984. 15