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COLORADO <br />Division of Reclamation, <br />Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />August 11, 2014 <br />Jerry Nettleton <br />Twentymile Coal Company <br />29515 Routt County Road 27 <br />Oak Creek, CO 80467 <br />Re: Foidel Creek Mine (Permit No. C- 1982 -056) <br />Minor Revision No. 279 (MR -279) <br />Adequacy Review <br />Dear Mr. Nettleton: <br />The Colorado Division of Reclamation, Mining and Safety (Division or DRMS) has received the <br />Twentymile Coal Company (TC) submittal of Minor Revision No. 279 (MR -279) for the Foidel <br />Creek Mine. The minor revision was received on August 11, 2014 and deemed completed on <br />August 11, 2014. The Division has reviewed the submittal and has the following questions and <br />comments. <br />1. It appears to the Division that an error has occurred in the numbering of the above <br />mentioned minor revision. TC submitted the minor revision application as MR -280. The <br />Division's records show that the last minor revision received was MR -278. This revision <br />should be documented as MR -279. Please update the header on the proposed revised page <br />2.05 -17.3 to reference MR -279. <br />2. The Division is still currently reviewing Technical Revision No. 83 (TR -83) and has not yet <br />approved "Exhibit 14A: Hydrologic Monitoring Plan - Wolf Creek Reserve" that is <br />associated with TR -83. As a result, the Division cannot approve the revised Exhibit 14A <br />with MR -279. The revised pages submitted with MR -279 on the proposed Exhibit 14A will <br />need to be addressed with TR -83 including information on corehole WC013A. <br />3. Please submit updated pages for "Exhibit 52 — Exploration Drilling Information" to include <br />all necessary information regarding corehole WC013A. <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http: / /mining.state.co.us <br />John W. Hickenlooper, Governor I Mike King, Executive Director I Virginia Brannon, Director <br />= 'c��a <br />aw ' - <br />1876 <br />