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Mountain Coal Company <br />July 16, 2013 <br />Mr. James R. Stark <br />Colorado Department of Natural Resources <br />Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <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 />iloveland(cDarchcoal.com <br />phone: 970 929 2308 <br />RECEIVED <br />JUL 2 2 2013 <br />DIVISION OF RECLAMATION <br />MINING AND SAFETY <br />Re: Mountain Coal Company, LLC, West Elk Mine; <br />Permit No. C- 1980 -007; Minor Revision No. MR -394: Minor Drainage Revisions <br />Dear Mr. Stark: <br />Mountain Coal Company, LLC (MCC) submits this letter and application for Minor Revision No. MR -394. <br />The purpose of this revision is to complete a minor drainage project as described below. This project will <br />remove an existing culvert (CE5 -9) and small drainage ditch (DE5 -11) located in the lower stockpile area and <br />replace it with a V deep, natural or "erodible" ditch with 2:1 side slopes. <br />CE5 -9 carries runoff from the vegetated slope in drainage area 14A. DE5 -11 carries stormwater from drainage <br />area 14B which contains runoff from both the vegetated slope to the south and a portion of the stockpile to the <br />north. For this reason the proposed ditch has been sized to carry the 10 year peak discharge from drainage area <br />14A and the 100 year peak discharge from drainage area 14B (See Tables 43E and 44E). The final ditch design <br />is a natural or erodible channel for ease of maintenance and includes 0.3 feet of freeboard. <br />See attachments for details and calculations. <br />Please contact me at (970) 929 -2308 or by e -mail should you have questions regarding this submittal. <br />Sine ly, <br />Je ica Loveland, P.E. <br />Environmental Engineer <br />cc: Weston Norris — MCC <br />Neal Starkebaum — Gunnison Co. <br />Page 1 of 1 <br />