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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Roam 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: (303) 832-8106 <br />3 l January 2005 <br />Mr. Jim Kiger <br />Oxbow Mining LLC <br />P.O. Box 535 <br />Somerset CO 81434 <br />COLORADO <br />DIVISION OF <br />MIN &RALS <br />GEOLOGY <br />RECLA MATION•NINING <br />SAFETY•SCIENCE <br />Bill Owens <br />Governor <br />Russell George <br />Ezeculive Director <br />Ronald W. Cottony <br />Division Director <br />Natural Resource Trustee <br />RE: C-1981-022; 2nd Adequacy Letter, TR-49 <br />Dear Mc Kiger: <br />The Division has completed a review of Oxbow Mining LLC's responses to our preliminary <br />adequacy questions for Technical Revision 49, Hubbard Creek Fall site. <br />Rule 2.O.i.d Reclamation Plan <br />I. Response accepted. <br />2. Response accepted. <br />Rule 2.05.5 Post-Mining Land Use <br />3. Response accepted. <br />Rule d.0.i -Hydraulics/Hydrologic Portions (SEDCAD) <br />4. The Division has no further collcems. [n the submittal dated February 16, 2005, Oxbow <br />provided Drawing Number 2.05-MSJ, sheet 2 of 2, which depicts the emergency spillway cross- <br />section. <br />5. The Division has no further concerns. In the submittal dated February 16, 2005, Oxbow <br />provided Drawing No. 2.05-MSJ, sheet 2 of 2, which shows the detail of the plunge pool. Also, a <br />Sedcad design page for the plunge pool was provided in the same submittal. <br />6. In the submittal dated February 16, 2005, Oxbow provided the requested Sedcad run. <br />However, the dimensions of the emergency spillway have changed from those in the original <br />submittal. Therefore, please revise the emergency spillway dimensions on the Pond F Summary <br />page. <br />The Division has no further concerns. In the submittal dated February 16, 2005, Oxbow <br />revised Drawing No. 2.05-M4 accordingly. <br />Office of Office of Colorado <br />Mined Land Reclamation Active and Inactive Mines Geological Survey <br />