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Evaluation of Potential Impacts <br />From The Proposed Nix Property Sand and Gravel Operation <br />' On Shallow Groundwater Levels, Water Wells and Wetlands <br />Water was observed in the irrigation pond on the Mayer property immediately east of the subject <br />wetland. It was estimated that the water level in this pond was 4-to 6-feet above the ground <br />surface of the wetland. Water was also observed in a pond on the Sage Hill Farm south of the <br />subject wetland (Figure 2). Water in this pond reportedly originates from a spring. <br />' 3.0 STUDY METHODS <br />3.1 Review of Existing Data and Information <br />This evaluation was conducted from a review and analysis of the following existing documents: <br />• "Geological Map of the Boulder-Fort Collins-Greeley Area, Colorado" (USGS 1978). <br />• "Hydrogeologic Characteristics of the Valley-Fill Aquifer in the Brighton Reach of the South <br />Platte River Valley, Colorado" (USGS 1972). <br />• Proposed mine plan documents including "Extraction Plan Map," "Reclamation Plan Map," <br />"Drill Hole Location Map" and "Water Features, Well Owners Within One-Half Mile," <br />prepared by Banks and Gesso, L.L.C. for Owens Brothers Concrete Company. <br />• Well permit records from the State Engineer's Office (SEO) for wells within one-half mile of <br />the proposed operation. <br />• Soil survey of Weld County, Colorado-southern part (Soil Conservation Service) 1980. <br />• "Depth to Water Table (1976-1977) in the Boulder-Fort Collins-Greeley Area, Front Range <br />Urban Corridor, Colorado" (USGS 1979). <br />• Letter from Lynn Loren, and Ottenhauf, L.L.P. dated July I1, 2001, Re: U.S.R.-1343, Special <br />Use Permit, Owens Brothers Concrete Company, Nix Sand and Gravel Mine. <br />' ott-o~a.ooa <br />April 2002 <br />Wright Wa[er Engineers, Inc. <br />Page 4 <br /> <br />