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A ground water model with solute transport was developed using the Colorado Rio <br />Grande Decision Support System MODFLOW model parameters as a basis. In order <br />to apply the ground water model, aquifer properties must be estimated, which is <br />presented in the next subsection. Results of ground water modeling are then <br />presented. <br />G.3.3.1 Well Survey <br />Using the Colorado Division of Water Resources on-line database and other <br />resources, high-capacity irrigation and municipal water wells were identified in the <br />area of interest. Information on the identified water wells and monitoring wells is <br />provided in Table G.3-1. Four monitoring wells (SLM-1, 2, 3, and 4) were installed <br />in the area by BMRI for water quality monitoring east and south of the irrigated areas. <br />Note that two irrigation wells (19564-F and 21590-F) already supply ground water to <br />the center pivot irrigation system, and will be used to provide supplemental water <br />under the irrigation program. <br />Reliable pumping test information is available for the two irrigation wells. In the area <br />of the center pivots, the aquifer transmissivity (T) is about 4,200 ft2/day, which <br />translates into a hydraulic conductivity value of 14 ft/d for a 300 foot thick saturated <br />zone. <br />Battle Mountain Resources, Inc. 34 <br />P:\Pmjmts\212-Newmont(S=Ltis)\S=Luis\Petnlit Am nd nt - West Pit MemF-t\VS Report & PM\Tem\PetmitA=ndmeN_v5c.dm December 2007