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Creek) should be considered as 100 percent depletive to the streamflow of the Yampa <br />River. <br />Among the three general accounts in Yamcolo Reservoir, the municipal account has the <br />senior priority with respect to filling its 1,010 acre-foot account; the Yamcolo Irrigators <br />Association has the second priority to fill its 3,000 acre-foot account and the Stagecoach <br />Contract water has the last priority of fill during years when the reservoir cannot fill <br />because of insufficient physical supply. <br />2.10. Stagecoach Reservoir <br />Stagecoach Reservoir is the largest storage facility in the Yampa River basin and is also <br />owned and operated by the UYWCD. The reservoir is intended to provide supplemental <br />industrial, agricultural, and municipal water supplies as well as a significantly sized <br />conservation pool for recreational purposes. According to an elevation capacity table <br />obtained from the UYWCD, the total capacity of the reservoir at the spillway elevation is <br />approximately 33,275 acre-feet and the capacity at the invert of the outlet works (dead <br />storage) is approximately 3,275 acre-feet, resulting in an active capacity of about 30,000 <br />acre-feet. The Division 6 engineer provided a regression equation relating the reservoir <br />water surface area to the reservoir capacity: <br />Surface Area = 0.84*(Capacity)^0.65 <br />The UYWCD has obtained the following absolute decrees for storage in Stagecoach <br />Reservoir: <br />Adjudication Appropriation Administration <br />WDID Date Date No. Amount <br />584213 03-30-1964 09-93-1961 40815.00000 11,614 acre-feet <br />OS-30-1972 06-29-1959 41727.39991 20,854 acre-feet <br />03-30-1964 06-02-1958 39599.00000 86 cfs <br />Additional discussion is warranted in regard to the water rights used at Stagecoach <br />Reservoir. The first storage right for 11,614 acre-feet was part of the former Wessels <br />Project and shares the same priority date as the Wessels Canal, which is owned in part, by <br />Tri-State for direct flow industrial use at the Craig Station. Pursuant to a 1992 agreement <br />between UYWCD and Tri-State, the UYWCD's storage decree is subordinated to the <br />priority of Tri-State's Wessels Canal flow right, to the extent that there is insufficient <br />flow for both. Note that diversions on the Wessels Canal water right at Craig Station are <br />limited to the amount legally and physically available at its original headgate location just <br />downstream of Stagecoach Reservoir. <br />The second storage right is part of the 40,720 acre-foot, conditional storage decree that <br />was transferred from the former Pleasant Valley Reservoir site, which is now the location <br />of Lake Catamount. A part of the Pleasant Valley decree (2,500 acre-feet) was also <br />Yampa River Basin Information 2-13 <br />