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<br />CO <br />1:'. <br />..., <br /> <br />8,000 and 10,000 feet. The surrounding mountains protect the land from <br /> <br />heavy winds and provide relatively cool nights. Weather records collected <br /> <br />at Rifle show erratic precipitation ranging from 6.93 (1936) to 15.55 <br /> <br /> <br />inches (1921). The average annual precipitation over the period of <br /> <br />record, 1910-1943, is 10.95 inches. Approximately ~4% of the annual <br /> <br />precipitation, or 4.85 inches, occurs during the crop growing season, <br /> <br />May 1 to October 1. The mean annual temperature over the 1910-1943 <br /> <br />period averaged410 F. with extremes of 330 below to 1040 above zero. <br /> <br />The average frost free period is 140 days extending from May 12 to <br />September 29. <br /> <br />Existing Irrigation <br /> <br />Lands of the project are under irrigation facilities of the Farmerts <br /> <br />Irrigation Company, a mutual stock irrigation company, and the Davie <br /> <br />Ditch, a privately owned irrigation canal. The Farmerts Irrigation <br /> <br />Company serves a partial water supply to 5,220 acres of land in the <br /> <br />vacinity of and north of the town of Silt. The Davie Ditch serves a <br /> <br />less ade~late supply of water to 340 acres of land near the town of <br /> <br />Rifle. <br /> <br />Irrigation works of the Farmer's Irrigation Company consist of a <br /> <br />5~ mile canal called Grass Valley, a 4,850 acre-foot off-channel reservoir <br /> <br /> <br />called Harvey Gap, and a lateral distribution system. The Grass Valley <br /> <br />Canal heads on East Rifle Creek near the tail water discharge of the <br /> <br />Rifle Falls Power Plant of the Public Service Company. The canal is <br /> <br />used as a feeder for the Harvey Gap Reservoir and as a service canal for <br /> <br />the land irrigated. The present capacity of the canal is approximately <br /> <br />60 second-feet. <br /> <br />,., <br />