Laserfiche WebLink
<br />n(i/3~Q <br /> <br />Table l.--Information on g~ound-wate~ ~esou~aes of the northern <br /> <br />High PZains of CoZorado <br /> <br />[Values estimated from data available in 1970] <br /> <br />GENERAL INFORMATION <br /> <br />Location. ~ . . . . . . . . . . . . . Eastern Colorado, between the <br />South Platte and Arkansas Rivers <br /> <br />Size. . . . . . . . . . . . . . . . . Approximately 9,500 square <br />miles (6,000,000 acres) <br /> <br />Irrigated area. <br /> <br />300,000 acres <br /> <br />Precipitation . <br /> <br />16 inches per year <br /> <br />CHARACTERISTICS OF THE OGALLALA AQUIFER <br /> <br />,. <br /> <br />Lithology . . . . . . . . . . . <br /> <br />Sand and gravel with lenses <br />of clay and silt (some cemented) <br /> <br />Saturated thickness . . <br /> <br />20-400 feet <br /> <br />Ground water in storage <br /> <br />80,000,000 acre-feet <br /> <br />Estimated recoverable ground water. <br /> <br />40,000,000 acre-feet <br /> <br />Annual aquifer recharge . . . <br /> <br />430,000 acre-feet <br /> <br />USE OF GROUND WATER <br /> <br />Irrigation <br />wells <br /> <br />Estimated <br />withdrawa 1, <br />acre-feet <br /> <br />1950. <br /> <br />220 <br /> <br />37,000 <br /> <br />1960. <br /> <br />500 <br /> <br />84,000 <br /> <br />1970. <br /> <br />2,560 <br /> <br />430,000 <br /> <br />OBSERVATION WELLS <br /> <br />1971. . . . . . . . . . <br /> <br />. . . . . . . <br /> <br />1,200 measured yearly <br /> <br />4 <br />