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EVALUATION OF POTENTIAL IMPACTS <br />TO WETLAND ON THE SAGE HILL FARM FROM THE <br />PROPOSED NIX PROPERTY <br />SAND AND GRAVEL OPERATION <br />INTRODUCTION/PURPOSE <br />This report presents the results of an evaluation of potential effects of aggregate mining at the <br />proposed Nix property sand and gravel operation ("Nix property") on the wetland located <br />immediately to the south on the Sage Hill Farm. A vicinity map of the project azea, which shows <br />the subject wetland, is included as Figure 1. <br />This evaluation was conducted based on review of existing information, observations of the <br />study area and subject wetland, and collection of additional data. An evaluation of potential <br />effects of the operation on groundwater and nearby vt~ater wells was also conducted, and is <br />included in a separate report by Wright Water Engineers, Ina (WWE). " <br />The initial proposal by Owens Brothers Concrete Company (Owens) was for dry mining with <br />dewatering. However, due to concerns expressed by neighbors, Owens revised its plans to <br />perform wet mining. Therefore, the potential effects of wet mining on the wetland are evaluated <br />in this report. In addition, measures to mitigate potential impacts from the operation aze <br />presented. <br />STUDY AREA DESCRIPTION <br />The Nix property is located in the E%s of SE'/< and S'/z of the SW'/< of Section 28, T3N, R67W in <br />Weld County (Figure 1). The site consists of approximately 320 acres of irrigated agricultural <br />land. <br />The Last Chance Ditch flows in a northeasterly direction immediately to the west of the Nix <br />property. Laterals from the ditch traverse agricultural fields azound the Nix property. The Side <br />Hill Ditch and several laterals serve the Sage Hill Farm to the south. An irrigation pond exists on <br />the Mayer property immediately to the east of the Sage Hill Farm and subject wetland. This <br />011-074.000 Wright Water Engineers, Inc. Page 1 <br />Noverber 2001 <br />