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There are 600 shares in the Cimarron Canal Company, 80 of which (13 percent) are owned by the City of Montrose. Montrose takes delivery of its shares at a turnout structure into Montrose Reservoir (aka Cerro Reservoir) on the basis of its pro rata entitlement to water diverted pursuant to the Canal's direct flow water rights. Montrose's water is then conveyed to Fairview Reservoir for treatment by the Project 7 Water Authority. Irrigation from the Cimarron Canal generally begins around the first of May and continues until early September. Many of the shareholders will continue to divert small amounts of irrigation water until the first of October, and small amounts of irrigation and stock water are run until late October. The principle crops under the system are alfalfa, grass hay, and small grains. 2.2.2. General Description of Bostwick Park Project Water supplies in the Cimarron River drainage are generally abundant until the middle of the irrigation season, at which time the supplies are severely reduced. For this reason, the Bostwick Park Water Conservancy District (BWCD) was formed in 1962 for the general purpose of supplying supplemental irrigation water to the Bostwick Park area. The Bostwick Park Proj ect was authorized as a participating project of the Colorado River Storage Project (CRSP). The USBR turned over the operation of the project to the BWCD in 1976. The key component of the Bostwick Park Project is Silver Jack Reservoir, which was completed in 1971 and is located on Cimarron River approximately 20 miles above its confluence with the Gunnison River. The reservoir has a total capacity of 13,520 acre- feet, including 12,820 acre-feet of active capacity and 700 acre-feet of inactive capacity, including dead storage. Elevation, area, and capacity data are summarized in the following table. Gunnison River Basin Information 2-3