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Mountain Coal Company <br />October 25, 2013 <br />Mountain Coal Company, LLC <br />West Elk Mine <br />P.O. Box 591 <br />Somerset, CO 81434 <br />Jessica A. Loveland, P.E. <br />Environmental Engineer <br />hoveland(a�archcoal.com <br />phone: 970.929.2308 <br />RECEIVED <br />Mr. James R. Stark <br />Colorado Department of Natural Resources OCT 2 LU1.i <br />Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 DMSI OF RECLAMATION <br />MINING AND SAFETY <br />Denver, CO 80203 - <br />Re: Mountain Coal Company, LLC, West Elk Mine; Permit No. C- 1980 -007; <br />Minor Revision No. MR402: Culvert across RPE Pond Cells Middle Embankment <br />Dear Mr. Stark: <br />Mountain Coal Company, LLC (MCC) submits this letter, application form and revised page from <br />Exhibit 66 for Minor Revision No. MR -402. This revision is to install a minimum 15" diameter <br />culvert in ditch DRPE -2 along the south side of the RPE ponds at the location of the middle <br />embankment between the two pond cells. This will allow vehicles and equipment to more readily <br />cross the embankment for pond cleaning and other maintenance work and/or serve as a turn- around <br />point. Ditch DRPE -2 is designed to carry 6.46 cfs of flow. Two other existing 15" minimum diameter <br />culverts, C3 -1 and C3 -lA, were designed to carry 7.50 cfs and 5.32 cfs, respectively, so a 15" <br />minimum diameter culvert will carry the 6.46 cfs of ditch DRPE -2, as well. This culvert has been <br />designated on Table 44E table as CRPE -6W. <br />Please contact me at (970) 929 -2238 or by e -mail should you have questions regarding this submittal. <br />Sincerely, <br />Kat Teen G. Welt, <br />Environmental Engineer III <br />cc: Weston Norris —MCC <br />Neal Starkebaum — Gunnison Co. <br />