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Show PROBLEMS OF IMPERIAL VALLEY AND VICINITY. 153 NUCLA COLONY. Present irrigated area, 5,000 acres; additional irrigable area, 5,000 acres. Mean annual temperature, 48°. Mean annual precipitation, 14 inches. Precipitation during growing season, 7 inches. Elevation, 6,000 feet. Interval between killing frosts (summer), 140 days. Transportation, Denver & Rio Grande Railroad, narrow gage; nearest station,.Placerville, 45 miles to project. This project was started by a socialistic colony many years ago, a 16-mile canal being built from San Miguel River. The increase in acreage to the ultimate project will require increased canal capacity and extension of the main canal. The diversion f6r this area will average 2.5 acre-feet per acre. Having prior rights to the waters of San Miguel River, whose discharge above their headgate averages 270,000 acre-feet annually, the project will enjoy a full water supply at all times without resort to storage. This project will be One of the first in the Dolores area to be completed, as the construction cost is less than with most projects, and an ample water supply is assured at all times. DISAPPOINTMENT VALLEY. Irrigable area, 17,000 acres. Mean temperature, 46°. Mean annual precipitation, 15 inches. . Precipitation during growing season, 8 inches. Elevation, 6,000 feet. Interval between killing frosts (summer), 140 days. Transportation, Denver & Rio Grande Railroad, narrow gage; nearest station, Dolores, 5d miles away. Irrigation plan.-Diversion from Disappointment Creek will be made to T. 42 N., R. 16 W. A feeder canal of 180 second-foot capacity and 6 miles long will deliver water to Custer Draw, where a reservoir of 17,400, acre-foot capacity is to be built. A short outlet canal will deliver stored water to the project lands. The inlet canal to the reservoir has been partially constructed. Duty of water.-Diversions for this project of 2 acre-feet per acre are expected. Water supply.-Diversions will be made from Disappointment and Springs creeks, with no records available. The drainage area of the two streams is approximately 200 square miles, with an average elevation of about 8,000, and the annual run-off is estimated at 35,000 acre-feet. With an annual demand of 34,000 acre-feet, the margin of water supply is too narrow to prevent many shortages. Storage.-For seasonal storage it is estimated that a capacity of 15,000 acre-feet is required, leaving but 2,400 acre-feet of the proposed capacity for hold-over. Frequent shortages are quite certain to occur, though probably not serious enough to warrant reduction in acreage. Data regarding additional available storage are not at hand. |
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Original book: [State of Arizona, complainant v. State of California, Palo Verde Irrigation District, Coachella Valley County Water District, Metropolitan Water District of Southern California, City of Los Angeles, California, City of San Diego, California, and County of San Diego, California, defendants, United States of America, State of Nevada, State of New Mexico, State of Utah, interveners] : |