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CRDSS <br />TASK MEMORANDUM 1.15-19 <br />Water Rights Planning Model <br />Bostwick Park Project - Cimarron River Water Rights <br />1.0 ISSUE <br />This memorandum describes the operation of the Bostwick Park Project and the major water rights that <br />divert water from the Cimarron River and the Little Cimarron River, tributaries of the Gunnison River at <br />Morrow Point Dam. The operations involve transbasin diversions, deliveries to the Project 7 Water <br />Authority, and a federal storage project to provide supplemental irrigation supplies. <br />2.0 DISCUSSION/ANALYSIS <br />General Description of Cimarron River Water Rights and Diversions <br />Most of the water rights in the Cimarron and Little Cimarron drainages are used to irrigate alfalfa and <br />meadow hay on lands adjacent to the streams and the area where the two streams join. The Cimarron <br />Canal is a major irrigation ditch that diverts from the Cimarron River and delivers the water to <br />Uncompahgre River basin where the water is used for irrigation in the Cedar Creek and Bostwick Park <br />areas. The Cimarron Canal holds direct flow water rights in the amount of 185 cubic feet per second <br />(cfs) as summarized in Table 1. <br />TABLE 1 <br />CIMARRON CANAL WATER RIGHTS <br />STRUCTURE STRUCTURE APPROPRIATION ADMINISTRATION <br />NAME I.D. DATE NUMBER <br />AMOUNT <br />Cimarron Canal5604-01-1903 19448.0000060 cfs <br />Cimarron Canal5603-28-1905 20393.2017539 cfs <br />Cimarron Canal5606-01-1925 28497.2754586 cfs <br />Silver Jack 35487-01-195538532.0000014,000 acre- <br />Reservoir feet <br />Silver Jack 35487-01-195538532.0000030,600 acre- <br />Reservoir feet (Cond.) <br />According to the Water Commissioner, the capacity of the canal is approximately 145 cfs. Using <br />mapping of irrigated acreage provided by the U.S. Bureau of Reclamation (USBR) and the Division of <br />Water Resources (DWR), the total acreage served by the Cimarron Canal is estimated to be <br />approximately 7,390 acres, which consists of approximately 1,740 acres under the canal between its head <br />gate and Cerro Summit (return flows accruing to the Gunnison River), 3,775 acres in the Bostwick Park <br />area (return flows accruing to the Uncompahgre drainage), and 1,875 acres under the Hairpin Ditch in <br />the Cedar Creek drainage, also tributary to the Uncompahgre. <br />1 <br />A275 01.09.95 1.15-19 Fosha, Hyre <br />