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Permit #: /r1-~i9~i-OG/ Confidental?: Class: G.e., ¢`3,n_ Type-Seq.: From: ~~ To: Brni Doc. Name ~ ~~,.~,-o /u~ ic?~ari/ -N:.r/J,:r- Doc. Date (if no date stamp) ~N~/c,~- ~{qP HYDROSPHERE Resource Consultants July 13, 2001 Ms. Cynthia Parker Sage Hill Farm 8234 WCR 28 Platteville, Colorado 80651 RECcIV~D JUL 113 2001 glylaian of Minerals and Geology Re: Initial Comments on Potential Impacts of Nix Property Sand and Gravel Mine Deaz Cynthia: With this letter, we aze responding to your request for comments on the potential water resources-related impacts of the proposed Nix Property Sand and Gravel Mine. We have focused on impacts to water resources aspects of the Sage Hill Farm. We have based our comments on a review of the following documents • Application For A Use By Special Review (Mining) for the Nix Property Sand And Gravel Mine -Weld County, Colorado, dated May 2001 • Application for Temporary Substitute Supply Plan -Owens Brothers Concrete Company Nix Sand and Gravel Mine, Weld County Colorado, dated June 2001 Based upon our initial review and evaluation of the proposed project, we believe that there are several potential impacts of concern. General Identification of Water Resources Impacts of Concern We have identified the following potential impacts of the proposed Nix Property Sand and Gravel Mine on the water resources of the Sage Hill Farm. Our preliminary evaluation indicates that several of these impacts maybe significant, and that they may result in material changes to the Sage Hill Farm if they aze not avoided or mitigated. In our opinion, these issues should be addressed in the permitting process for the proposed Nix Sand and Gravel Mine. Policy Analysis Engineering • Environmental Assessment . Information Systems 1002 Walnut, Suite 200 Boulder, Colorado 80302 U.S.A. • (303) 443-'7839 • TeleFax (303) 442-0616 P.O. Box 445 Socorro. New Mexico 87801 U.S.A. (505) 835-2556 TeleFax (505) 835-2609