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~C <br />February 23, 2006 <br />Mr. James Stark <br />Environmental Protection Specialist <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Re: <br />Dear Mr. Stark: <br /> <br />RECEIVED <br />FEB 2 7 2006 <br />Division of Ltinera~~• s <br />~,~,,,,, <br />Oxbow Mining, LLC (OMLLC) has received the Division's February 22, 2006 Adequacy <br />review for MR-76 (via facsimile). The purpose of this letter is to provide a response to <br />the Division's concerns. <br />1. Hydrology Monitoring Plan -- PAP Volume 12, Exhibit 2.05-E7 provides the <br />information regarding the overall OMLLC Hydrologic Monitoring Plan. The H-10 Well <br />and the B-Seam Well described in the Plan will be monitored to determine B-Seam <br />water levels. Pumped water volumes will be measured utilizing installed water flow <br />meters. `lJltimafely, this information will be included in the AHR's. <br />2.'~''' The,Gtilify borehole will have a removable cap installed to provide temporary <br />sealing. The tiorehole's location is adjacent to the Hubbard fan facility. Both the surface <br />fansite facility and underground borehole (and adjacent fan shaft) are on a weekly <br />inspection schedule to satisfy MSHA requirements. <br />3. OMLLC has reviewed the Division's reclamation cost estimate. Regarding the <br />two rib boreholes, one borehole has already been plugged and sealed with concrete, <br />and the second borehole has been plugged and partially sealed with concrete. The plan <br />is to complete the sealing of the second rib borehole when the site is safely accessible <br />by a concrete truck. For this reason, we believe the Division's cost estimate should <br />include only the two water transfer boreholes and the utility borehole and not the two rib <br />boreholes. <br />Please contact me at (970) 929-5806 if you have questions or require further <br />information. <br />Sincerely, <br />,_ <br />..~. <br />Environmental Coordfhatdr '" - - <br />Xd:' ''' Jim' cooper (OMLLC) <br />"' Files - <br /> <br />3737 Hwy 133 P.O. Box 535 Somerset, Colorado 81434 USA <br />TEL (970) 929-5122 FAX (970) 929-5177 <br />