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This report contains the basic ground water level data collec#ed in the Upper Big <br />Sandy Designated Ground Water Basin during the period from February 199'I <br />through March 2041. Acquisi#ion and publication of this information is a cooperati�e <br />effort between the Upper Big Sandy Ground Water Management District and the <br />Colorado Di�ision of Wa#er Resources. The project is part of a statewide ground <br />wa#er level monitoring p�-ogram funded by Senate Bill 2QQ (1987 legislative <br />session). This regislation directed that a portion of the fees collected for water welf <br />permit applications be used for the es#ablishment of a program to monitor water <br />le�ei trends throughout the state. <br />With one exception, the wells in this report are listed by township, range, and <br />section, beginning at the north end of the basin and prviceeding south. The <br />exception consists of 6 of the 8 monitoring and production wells owned by the <br />Town of Limon, The data sheets for the fi monitoring wells located in the vic'rnity of <br />the town ha�e all been placed together at the back of the report. The locations of <br />these 6 wells are shown on a map or maps included with the data shee#s. The <br />data sheets for the town's Frasier Farms production wel! and the well identified as <br />Big Sandy #4 are indexed by location. <br />The Iocations for al! of the wells have been determined with a satellite based global <br />pasitioning system (GPS}, and that location information in UTM grid format is <br />included. Footage distances from section lines shown on the data sheets were <br />measured from U.S.G.S. 7'/z minute topographic maps based on Iocations <br />determined by GPS. <br />The report contains water le�el measurements for 3D wells mvnitored on a regular <br />basis. Hydrographs are presented for weils with more than 3 annual <br />measurements. Mr. Glenn Graham of this office took water le�el measurements in <br />these wells during #he month of March, 20D1. <br />30 wells were measured for this year's report. �ne well, the Town of Limon Frasier <br />Farms well, is included for the first time this year. The remaining 29 wel�s show an <br />a�erage water level decline of 0.87 of a foot from March of fast year. Water leveis <br />increased in 3 of the wells, and decreased in 26 of the wells. The changes ranged <br />from an increase of �.17 feet to a decline o� 2.4 feet. <br />Long term water fe�e� data far the period from 1991 through 2�01 for 23 wells <br />shows that, on a�erage, water le�els are now higher by 1.72 feet than they were in <br />1991. Qne we[I shows a decline of �.91 of a foot, and the remaining 22 wells show <br />increases in water ke�els up to a maximum of 7.0? feet. With a few exceptions, <br />the well hydrographs show le�el to declining water levets from 1991 through about <br />1996 or 1997. The general trend since 1997 has been one of increasing water <br />levels. <br />The information in this report was compiled, edited, and prepared for publication by <br />Glenn Graham. <br />