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<br />',' <br /> <br />. <br /> <br />. <br /> <br />COLORADO GROUND-WATER LEVELS <br /> <br />SPRING 1962 <br /> <br />by <br /> <br />M. M. Skinner <br /> <br />INTRODUCTION <br /> <br />Ground-water levels are generally up from last spring in the majority <br />of the pump-irrigated areas of Colorado. Some areas are experiencing the <br />highest spring ground-water levels since the early 1950's. A few areas, which <br />are dependent on ground-water as the principal source of irrigation supply, <br />continue to exhibit an annual decline in the water table. <br /> <br />This report contains spring measurements of depth to the ground- <br />water table (below land surface) as obtained from observations in a total of <br />approximately 565 wells in 21 counties in Colorado. The observation wells <br />(primarily existing irrigation wells) are identified by legal description and <br />grouped according to drainage areas for individual counties. The spring <br />measurements were made generally during the months of March ~ April <br />by either the Colorado State University Experiment Station or the Ground <br />Water Branch of the U. S. Geological Survey. Water level measurements <br />were made with a steel tape or electrical sounder. <br />Where data are available, measurements are included for the years <br />1952, 1957, 1960, 1961 and 1962. The 1960, 1961 and 1962 measurements <br />are intended to illustrate recent trends in the ground-water level for the <br />various areas. The 1957 measurement is included to show the 5-year <br />change and represents in many areas the lowest water table levels on record. <br />The 1952 measurement is included to show the 10-year record. <br />The ground-water observation well network was originally established <br />in 1929 by the Colorado State University Experiment Station. The network <br />