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<br />Il018!F <br /> <br /> <br />IN REPLY REFER TO; <br /> <br />~~! . <br /> <br />~i~t~~ <br /> <br />United States Department of the Interior <br /> <br />GEOLOGICAL SURVEY <br />Box 25046 <br />Denver Federal Center <br />Denver. Colorado 80225 <br /> <br />Water Resources Division <br />Colorado District <br />.--t,;o. <br />Mail Stop 415 ". <br /> <br />June 22, 1977 <br /> <br />INFORMATION FOR TIlE PRESS: <br /> <br />SUBJECT: U.S. Geological Survey releases fourth report on digital ground- <br />water model of the Ogallala aquifer in parts of Cheyenne and <br />Kiowa Counties, northern High Plains of Colorado <br /> <br />RELEASE DATE: Immediately <br /> <br />J. E. Biesecker, District Chief <br />Colorado District, WRD, Mail Stop 415 <br />U.S. Geological Survey <br />Box 25046, Denver Federal Center <br />Lakewood, Colorado 80225 <br />Telephone: 234-3815 <br /> <br />mp-,',1rJ18J}_~~Wl~~""" "n <br />~lL~.~!L2~_1977 liu <br /> <br />. -~~..~- .~.../ ~ <br />COLa Wi' -/-C" <br />. 'tY'1 L-r\ <br />CONSERVATION BOARD <br /> <br />FOR ADDITIONAL INFORMATION CONTACT: <br /> <br />" <br />Ground water pumped from the Ogallala Formation is the principal source <br />of water for irrigation in agriculturally oriented Cheyenne and Kiowa <br />Counties, Colo. Proper management of this exhaustible resource is essen- <br />tial for continuing irrigation practices on a long-term basis according <br />to a recent study made by the U.S. Geological Survey in cooperation with <br />the Colorado Water Conservation Board; the Colorado Division of Water <br />Resources, Office of the State Engineer; and the High Plains Management <br />Districts. <br /> <br />This report describes aquifer conditions and the development and use of <br />a digital model to evaluate the effects of future pumpage. ' Some perti- <br />nent quantitative information from the report follows: <br /> <br />Local recharge from infiltration, averaging 0.59 inch per year, is not <br />sufficient to replace pumping withdrawals, and ground-water supplies are <br />being depleted. <br /> <br />The digital model, made in conjunction with this study, was used to esti- <br />mate the effects of pumping on water levels in the aquifer for the years <br />1964 to 2000. In 1964, the volume of water stored in the aquifer was <br />about 5.87 million acre-feet. If pumpage continues at the 1972 rate, <br /> <br />"O,-UT/O.y <br /> <br />Q'.~0>0 <br />~ 9- <br />(3 -< <br />_ m <br />a; << <br />~ ~ <br />-,v,>. /\.-4. <br />';'16 _1910 '" , <br /> <br /> <br />[~ <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />,fiR"" <br /> <br />Ii <br />~',,'!.ji) <br />"W~ <br />~h:'~ <br />~ <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />~"''' <br /> <br /> <br /> <br /> <br /> <br />g;;~~; <br /> <br />;;.:':-;~::'~' <br /> <br />