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Instream Flow Characteristics Instream flow amounts are determined by the Colorado Division of Wildlife and Colorado Water Conservation Board (CWCB). Instream flow standards are intended to "preserve the natural environment to a reasonable degree" (CRS 37 92 102(3)). Instream flows are identi- fied by determining the flow necessary to sus- tain aquatic life. Table 1 summarizes instream flow standards during different times of the year along the Eagle River. cities of Aurora and Colorado Springs. Its storage capacity is 43,000 acre feet. Recently, a three year agreement was signed between Aurora and a group of local water provider districts that calls for the release of 300 acre feet of water from the Homestake Reservoir to aug- ment flows in the Eagle River during dry periods. 2. Climax Reservoirs: Climax Mine has two private reservoirs in the Eagle River watershed, Eagle Park and Robinson Reservoir, which together have a 6,000 acre foot capacity and were built for industrial purposes at the mine, tailings impoundment and distilling. The Eagle Park Reservoir is currently being reclaimed and could be available for aug- menting flows in the Eagle River water- shed. Table 1. Eagle River Instream Flow Standards Eagle River Section Instream Flow (CFS) Standard SUMMER WINTER Cross Creek to Gore Creek 50 20 Beaver Creek to Lake Creek Lake Creek to Brush Creek Brush Creek to Colorado River 85 110 130 35 45 50 3. Black Lakes: Black Lakes are located on the west side of Vail Pass. Black Lakes 1 & 2 Reservoirs were constructed by the Colorado Division of Wildlife are used for recreation and augmenting flows in the Eagle River watershed (specifically Gore Creek). The two lakes have a total capacity of 300 acre feet, a portion of which is available for augmentation. NOTE: Summer = May 1 through September 30; Winter = October 1 through April 30 Existing Water Storage Facilities Dams and reservoirs are typically constructed for flood control and to capture a portion of the spring runoff so that water can be stored for release during drier periods of the year. There are six water storage facilities in the Eagle River Basin: 1. Homestake: The largest reservoir is Homestake Reservoir which is located high in the headwaters of the Eagle on U.S.F.S. land southeast of Red Cliff. Homestake reservoir delivers approxi- mately 28,000 acre feet per year to the M; 18 ..... 4. Nottingham Lake: Nottingham Lake is located within Town of Avon and has a 100 acre feet storage capacity. The major use of the lake is recreation. 5. Sylvan Lake: In November of 1994, the Town of Eagle and the Colorado Department of Natural Resources signed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .