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<br />. <br /> <br />. <br /> <br />GVWM Flow Protection Plan <br /> <br />December 19, 1994 <br />4:02pm <br /> <br />DRAFr <br /> <br />- At less than full irrigation demand, up to 400 cfs can be used to generate <br />hydroelectric power. <br />- In the winter, and when irrigation demand by others diminishes, OMID can <br />increase its hydroelectric power demand until the power canal reaches capacity <br />of about 860 cfs. <br />- Relies on GMR storage for irrigation water when natural supplies are insufficient. <br /> <br />3) GRAND VALLEY WATER USERS' ASSOCIATION <br />- Serves approximately 32,000 acres including two small irrigation districts north <br />of the Colorado River, above the GVIC service area. '" ",iD, ,,/ <br />Gravity system, no storage. 'fiT <br />Created to operate the U.S. Reclamation Service's Grand Valley Project. <br />Shares power revenues with OMID. <br />Has diversions protected by OMID operating "check." <br />Has capacity to demand 850 cfs for irrigation, including service to t 1'\1 0 s...il1l J <br />irrigation districts with senior rights totaling 120 cfs" !J:;,,,;l:~':::::,~ (>J<-- <br />Relies on GMR storage for irrigation when natural supplies are insufficient. (\ <br /> <br />The Grand Valley Water Users' Association, the Orchard Mesa Irrigation District, the Palisade <br />Irrigation District and the Mesa County Irrigation District all divert from the Colorado River at <br />the GVP diversion dam. This dam in known locally as the Roller Dam, the Cameo Dam, the <br />Cameo Diversion, or the Grand Valley Project Diversion Dam. <br /> <br />Cameo Demand <br />A summation of the water rights above totals 2,350 cfs. However, due to capacity constraints <br />on the portion of the Grand Valley Project canal from the diversion dam to the inlet of tunnel <br />number 3, it is not possible to divert the full 400 cfs power plant water right when there is also <br />a full irrigation demand. The capacity of this portion of the canal is 2,260 cfs. Consequently, <br />when fully supplying the GVWUA and OMID irrigation needs it is necessary to decrease the <br />flow in the power plant to 310 cfs. During periods of less than full irrigation demand, more <br />water may be directed through the power plant. <br /> <br />4 One of the irrigation districts has a junior water right of 23.5 cfs which is not only subject <br />to river administration but is also subject to the capacity of the Grand Valley Project Diversion <br />dam and canal system. Consequently, this right has little bearing on river administration since <br />there is usually no canal system capacity during periods of peak irrigation demand. <br /> <br />5 <br />