2012-12-26_REVISION - C1981022 (2)

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OXBOW MINING, LLC 3737 Hwy 133 P.O. Box 535 Somerset, Colorado 81434 USA Tel (970)929 -5122 Fax (970)929 -5177 December 20, 2012 Mr. Brock Bowles Environmental Protection Specialist Colorado Division of Reclamation, Mining and Safety 1313 Sherman Street, Room 215 Denver, Colorado, 80203 Re: Oxbow Mining LLC, Permit No. C -1981 -022 - MR -101— Response to PAR #1. Dear Mr. Bowles, RECEIVED DEC 2L 2012 Division of Reclamation, Mining & Safety " The purpose of this letter is to provide a response to the Division's November 28, 2012 PAR #1 for MR -101. 1. Facility Description. A revised PAP page 2.05 -23c is attached and contains additional language describing the generator facility, and in particular, the facility substation. 2. Facility Drainage. The facility is designed to generally route stormwater sheet flow to the west, east and north and ultimately to Elk Creek. The facility utilizes a gravel pad, vegetative cover, BMPs (straw bales and straw wattles, sediment traps), rock protected drainage channels, etc. to reduce sediment from the site. Once the facility construction is completed, the facility will direct drainage away from the OMLLC facility to reduce any effect on OMLLC sediment control systems. We have provided such flow paths to the attached revised Map 2.05 -M1. 3. Sump Water Injection Borehole We believe the borehole is accurately presented on the submitted Map 2.05 -M1. The surveyors are utilizing state of the art GPS based survey technology for these surveys. 4. Disturbance Boundary Change. The difference between the original disturbance boundary and the smaller, revised disturbance boundary is only 0.2 acres. A revised application form is attached reflecting this change. 5. Other Facility Regulatory Authorities. As requested by Director Pineda, PAP page 2.05 -23c has been modified to include an identification of those authorities who would have regulatory oversite for the facility.