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Canal <br />Windy Gap Pump PL 514700 47602.00000 12/31/1980 4/30/1980 200 cfs <br />Canal <br />As a term of settlement with various Western Slope water users, diversions by the project are <br />limited to not more than 90,000 acre-feet in any single year and not more than an average of <br />65,000 acre-feet per year in any consecutive 10 year period. The Windy Gap diversions are also <br />subordinated, by agreement, to all existing and future junior direct flow diversions for municipal, <br />domestic and irrigation uses in the Fraser River basin. The effect of this subordination is <br />expected to be minimal since these junior uses are relatively small and have minimal <br />consumptive use. <br />As a further condition of settlement, the Municipal Subdistrict agreed to certain minimum <br />streamflow values downstream of the Windy Gap Diversion Dam. Windy Gap diversions cannot <br />occur unless the following minimum flows requirements on the Upper Colorado River are <br />satisfied: <br />Windy Gap Diversion Dam to Confluence with Williams Fork River: 90 cfs <br />Williams Fork Confluence to Confluence with Troublesome Creek: 135 cfs <br />Troublesome Creek Confluence to Confluence with Blue River: 150 cfs <br />In case numbers 80CW446, 447 and 448, the CWCB appropriated instream flow rights in these <br />same amounts and river reaches. The CWCB rights are slightly junior to the Windy Gap water <br />rights. The Windy Gap prof ect was completed in 1985 and the first diversions occurred in 1986. <br />These historical diversions can be used for purposes of calibrating the model. <br />2.2 Denver Water <br />The Denver Board of Water Commissioners (Denver) operates two extensive water collection <br />systems in the Colorado River Basin. The first located in the Williams Fork and Fraser River basins <br />diverts water through a system of open canals, closed conduits and tunnels to the West Portal of the <br />Moffat Tunnel. The tunnel conveys the water to the headwaters of South Boulder Creek on <br />Colorado's Eastern Slope. Delivery of the transmountain water is regulated using the storage in <br />Gross Reservoir and Ralston Reservoir. The following discussion summarizes the key components <br />of the Moffat Tunnel System. <br />Denver's second system is located on the Blue River consisting of Dillon Reservoir and Harold D. <br />Roberts Tunnel, discussion of this system is located in section 2.2.6. <br />2.2.1 Williams Fork Diversion Project <br />The Williams Fork Diversion Project collects water from a number of small tributary streams at <br />the headwaters of the Williams Fork River and diverts it into the Gumlick Tunnel a.k.a. the Jones <br />Pass Tunnel (WDID 514603). The major streams from which water has historically been <br />diverted include: (1) McQuery Creek; (2) Jones Creek; (3) Bobtail Creek; and (4) Steelman <br />Upper Colorado River Basin Information 2-12 <br />