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t <br />OXBOW MINING, LLC <br />3737 Hwy 133 P.O. Box 535 Somerset, Colorado 81434 USA Tel (970)929-5122 Fax <br />(970)929-5177 <br />December 22, 2008 <br />Ms. Marcia L. Talvitie, P.E. <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety Q <br />691 County Road 233, Suite A-2 <br />Durango, Colorado 81301 ' <br />? ?QQQ <br />r, <br />Re: Oxbow Mining LLC, Permit No. C-1981-0221 `\ u? rv''sa{e?`! <br />TR-60 Response to December 16, 2008 Second PAR. <br />Dear Ms Talvitie, <br />The purpose of this letter is to respond to the cited PAR for the Technical Revision No. 60 to the Oxbow <br />Mining LLC (OMLLC) Permit No. C-1981-022. <br />This TR provides for a mine plan change to add the Bear Creek shaft and fan facility. Many of the earlier <br />PAR issues have been resolved and we offer the following issues and comments for the remainder of the <br />comments. Many of the following responses are a direct result of a December 17, 2008 teleconference <br />between Oxbow Representative Tom Leidic of MWH and Joe Dudash of the Division. We appreciate Mr. <br />Dudash's efforts to resolve the issues in a timely manner. <br />2. Rule 2.05.6(3) requires that ground water quantity be protected from proposed mining <br />operations. Please propose a hydrologic monitoring program to determine the <br />occurrence and quantity of water that seeps into the fan shaft from the Bear Creek <br />alluvium. <br />Oxbow responded in their November 26, 2008 submittal that the current plan of <br />monitoring water seepage into the mine and reporting this seepage in the annual <br />hydrologic report is sufficient. However, the Division does not believe that annual <br />monitoring and reporting can provide enough of an early warning of any problems that <br />might be occurring due to the shaft being so close to Bear Creek. The Division requests <br />that the presence and quantity of groundwater inflow into the shaft be measured and <br />reported to the Division on a monthly basis during, if possible, and after construction of <br />the shaft. <br />Oxbow rCSpo;1Se: During x'_Imv v',`Ifl zxmenltor and report water seepage into <br />the rnii"ic ftoiii the shaft on c ' .. ( 'Iy ". rac-'5. vIetion of the shaft, Oxbow will have a <br />oo ;t?tiu. of °v1'c1tM1 i',o?li ?: C;. %d?1' .. ... _...i?'w?S^ SSlon with the Division regarding <br />t''•ie i ;'1tS { SUUSt:: vi .v^^ ! _"l Dili:. i .^SSibte inflows. <br />0 Page 1