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relatively junior water rights. Eleven Mile Reservoir is operated so that it can store water to <br />replace evaporative losses over the year, subject to the Consolidated Ditches agreement <br />discussed above. <br />Eleven Mile Reservoir is an alternate point of diversion for transferred Beery Ditch and Four <br />Mile #9 rights into the Denver Intake. There are no adjudicated minimum flow requirements <br />below Eleven Mile Reservoir. Aurora's releases of reservoir storage water from Spinney <br />Mountain Reservoir and bypass flows for senior rights are usually enough to maintain local <br />fisheries. <br />8) Cheesman Reservoir <br />Cheesman Reservoir is operated to provide storage both for seasonal supply and long term <br />drought periods. Cheesman Reservoir is the first of the southern reservoirs to be filled, as a result <br />of its senior water rights, and is used to meet demand on the Southern system that is not supplied <br />by direct flow rights, transbasin diversions, or releases from Marston Reservoir or Platte Canyon <br />Reservoir. Cheesman Reservoir is allowed to store evaporative losses beyond an administrative <br />fill, subject to the Consolidated Ditches agreement discussed above. <br />During average years, the reservoir storage is held to between 50,000 ac-ft and 60,000 ac-ft <br />through the end of March to allow storage of runoff. Any drawdown beyond this point typically <br />means the reservoir will not fill. Denver Water generally maintains outflows from the reservoir <br />at the lesser of natural inflows or the following seasonal rates: <br />• 35 cfs from August through March <br />• 40 cfs from April through July <br />Based on an internal operating policy to support stream flows, Denver Water will maintain <br />outflows of 60 cfs from the reservoir year-round if it will not adversely impact the yield to its <br />overall system. <br />9) Strontia Springs Reservoir and Foothills Water Treatment Plant <br />Strontia Springs Reservoir, completed in 1982, was constructed as a terminal reservoir and <br />diversion structure for the Foothills Water Treatment Plant. The reservoir does not provide <br />carryover storage to Denver's raw water system. Power is generated from releases to the river <br />below the dam and via Foothills Conduit No. 26. <br />Strontia Springs Reservoir is maintained nearly full, at elevations between 5,980 feet (5,833 ac- <br />ft) and 6,002 feet (7,864 ac-ft) year-round, and can be used to minimize river fluctuations. For <br />the most part, Denver Water's direct flow rights that have been transferred to the Denver Intake <br />(Conduit No. 20) have Strontia Springs as an alternate point of diversion and may betaken <br />through Foothills Conduit No. 26. <br />Minimum fish flow requirements downstream of Strontia Springs Dam of 60 cfs from May 15 tc <br />September 15 and 30 cfs from September 16 to May 14 are required by the "Water Management <br />Plan for the South Platte River Canyon Below Strontia Springs Dam" (approved May 16, 1979, <br />and incorporated into the August 16, 1978 Amendment to the Grant of an Easement). Fifteen cfs <br />of the winter minimum flow maybe diverted at the Old Last Chance Ditch at Chatfield <br />Denver Water Board Operating Memorandum 37 of 40 <br />