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<br />U\li184 \i <br /> <br />(5) When replacement releases are being made, the release rate typically ranges from 240 cfs <br />to 280 cfs, the flow rate necessary to generate maximum power from the Williams Fork <br />Hydro Plant (3 megawatts). As the demand for replacement water tapers off, the flow rate <br />is reduced down to about 100 cfs, the minimum flow rate required for minimum generation <br />of hydroelectric power (1 megawatt). In a dry year, Denver will reduce the release rate to <br />50-60 cfs, turning off the hydro diversions and using only the normal reservoir outlet <br />works; <br /> <br />(6) During the fall and winter months, the releases are currently (since 1988) controlled in a <br />manner to draw down the reservoir to approximately 60,000 acre-feet as carry-over for <br />the following year. Prior to 1988, because Denver's municipal demand was less, the <br />reservoir was typically drawn down to an even greater extent with the. objective of <br />maximizing power generation. Denver uses an internal flow forecast model to project <br />inflows to the reservoir and to plan for storage levels and power generation. It is noted <br />that the generation of hydroelectric power is not a orimarv function or goal of the reservoir <br />operation but rather a byproduct benefit realized from operation for the primary purpose <br />of replacing out of priority diversions. <br /> <br />. <br />1-& <br /> <br />Denver - Climax Exchanae - During the CRDSS study period, Denver maintained a separate account <br />in Williams Fork Reservoir as part of the Denver-Climax Exchange, involving the yield from the <br />Englewood's Cabin-Meadow Creek Project and Meadow Creek Reservoir (see subsequent <br />discussion) and the diversions at the Henderson Mill (WDID 511070) in the upper reaches of the <br />Williams Fork River. During times when Henderson is diverting water out-of-priority with respect <br />to Denver's Williams Fork Collection system, Denver would bypass sufficient water at the <br />collection system to support Henderson's diversion and would receive, as replacement, water from <br />Henderson's ~OOO acre-foot account in Meadow Creek Reservoir. At times when there is an <br />administrative call from the Colorado River (eg. Shoshone), Denver would provide replacement for <br />Henderson's out-of-priority diversions using releases from a 2,200 acre-foot account reserved in <br />Williams Fork Reservoir. This account is used when necessary to allow Henderson to continue to <br />divert water when the Henderson water rights would otherwise be out of priority with respect to <br />the river. <br /> <br />Williams Fork Exchanaes - The interaction of Williams Fork Reservoir with the operation of the <br />Roberts Tunnel and Dillon Reservoir will be discussed in more detail in a separate section of this <br />documentation. <br /> <br />The Frasar River Diversion Proiect <br /> <br />The Fraser River Diversion Project (numerous WDID's) diverts water from the Fraser River <br />and a number of its tributaries and delivers it into the Moffat Tunnel (WDID 514655) for <br />conveyance to Gross Reservoir on the East Slope. The major drainages from which the diversions <br />are made include: (1) The St. Louis Creek Drainage; (2) The Vasquez Creek Drainage (including <br />water imported from the Williams Fork basin via the Gumlick and Vasquez tunnels); (3) The <br />Fraser/Jim Creek Drainage; and (41 The Ranch Creek Drainage (South, Middle and North). There <br />are multiple headgate structures in each of these drainages and the absolute water rights at each <br /> <br />0-3 <br />