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This report contains ths basic ground water le�ei data collected in the Upper Big <br />Sandy Designated Ground Water Basin during the period from February 1991 <br />through March 2003. Acquisition and publication of this information is a cooperative <br />effort between the lJpper Big Sandy Ground Water Management District and the <br />Colorado Division of Water Resources. The projec# is part of a statewide ground <br />water le�el monitoring program funded by Senate Bill 20� (1987 legislative <br />session). This legislation directed that a portion of the fees collected for water wel! <br />permit applications be used for the establishment of a program to monitor water <br />le�el trends throughout the state. <br />Wi#h one exception, the wells in this report are listed by township, range, and <br />section, beginning at the north end of the basin and proceeding south. The <br />exception consists of five of the seven monitaring and production wells owned by <br />the Town of �imon. The data sheets for the fve monitoring wells located in the <br />vicinity of the town ha�e all been placed together at the back of the report. The <br />locations of these fi�e we11s are shown on a map or maps included with the data <br />sheets. The data sheets for the town's Frasier Farms production well and the well <br />identified as Big Sandy No. 4 are indexed by location. <br />The locations for all of the wells ha�e been determined with a satellite based global <br />positioning system (GPS}, and that location information in UTM grid format is <br />included. Footage dis�ances from section [ines shown on the data sheets were <br />measured from U.S.G.S. 7'/z minute topographic maps based on locations <br />determined by GPS. <br />The report contains water �evel measurements for thirty wells monitvred on a <br />regular basis. Hydrographs are presented for wells with more than fi�e annual <br />measurements. Water le�el measurements in twenty-nine of these wells were <br />taken on February 13 and �4, 2��3. One wel�, BSD No. 36, was measured on <br />March 14, 2003. <br />All thirty wells were measured for this year's report. The thirty wells show an <br />a�erage water le�el decline of 4.77 of a fvot since March of last year. Water le�els <br />increased in six of the wells, and decreased in twenty-four of the wells. The <br />changes ranged from an increase of 2.52 feet to a decline of 3.37 feet. The Town <br />of Limon's Chr�stopher Well Field wells all showed increases in the static water <br />le�el. This increase is likely the result of a late summer six-inch rain e�ent <br />locaiized around the Town of Limon. Remo�ing the fi�e Christopher Well Field well <br />measurements from the a�erage results in an a�erage decrease in water levels for <br />the twenty-four Upper Big Sandy Gr�und Water Management District weils of 1.21 <br />of a foot. The remaining Town of Limon well, the Fraiser Farms well shows a water <br />le�el decline of 1.Q8 feet since March of 2402. <br />Long-term water level data fvr the period from �99� through 20�3 for #he twenty- <br />fi�e wells outside the Christopher Well Field shows that, on a�erage, water le�els <br />are now higher by 0.54 of a foot than they were in 1991. �ne well shows a declin� <br />