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i~ <br />© TerraMatrix <br />MONTGOMERY WATSON <br />Natural Resource Group <br />July 1G, 1997 <br />Susan Burgmaier <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />Re: TR-29 Responses, Sanborn Creek Mine (C-81-022) <br />Dear Susan: <br />~ III IIIIIIIIIIlIIIII <br />RECEIVED <br />JUL 18 1991 <br />DiviSiOn of Mlnerais 8, Geology <br />Attached aze revised pages 185 and 200. These should replace pages ]85 and 200 in .Appendix B. As <br />shown on the attached pages', an Operational \~later Level has been added to bolt Pond Summaries. <br />The Operational Water Level is the maximum water elevation allowed to maintain adequate storage <br />capacity for die 10-yeaz, 24-hour event. <br />If you have any questions or require any additional utfomtauon please not hesitate to call. <br />Sincerely <br />Terra~Maotrix~/Montgsomery W tson <br />Thomas E. Leidich, P.E. <br />Senior Engineer <br />cc: Thomas Anderson, Oxbow <br />Jerry Nettleton, TerraMatrix <br />1fi5 South Union Blvd. Tel :303 763 5140 Serving the World's Environmental Needs <br />Suite 460 Faz: 303 763 6003 <br />Lakewood, CO <br />60228 <br />