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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 />June 26, 2017 <br />Tony Tennyson <br />Colowyo Coal Company L.P. <br />5731 State Highway 13 <br />Meeker, CO 81641 <br />Re: Colowyo Coal Nfiine (Permit No. C-1981-019) <br />Technical Revision No. 111(TR-111) <br />Adequacy Review <br />Dear Mr. Tennyson: <br />After reviewing TR -111 from Colowyo Coal Company L.P. (Colowyo), the Division has the following <br />comment: <br />1. When reviewing Exh. 7-23, Figure M-3 I] Initial Disturbance Model Collector Ditches, there are <br />appears to be two parcels of disturbances that do not drain to the Coal Stock He as modeled in the <br />provided SedCAD. The first parcel is 1.5 acres noted as SWS44-1. SWS44-1 lies north of the West <br />Collector Ditch and what appears to be down gradient ofthe ditch. The second is a small section located <br />in the north western tip of the SWS47-2 parcel just north of the West Collector Ditch. Again, this area <br />appears to be down gradient of the ditch and does not reportto the Coal Stockpile Pond. Please provide <br />the Division with additional detail regarding the drainage of these parcels to ensure all disturbances <br />report to the Coal Stockpile Pond as designed <br />If you have any questions, feel free to contact me at any time. <br />Sincerely, <br />Zach Trujillo <br />Environmental Protection Specialist <br />(303) 866-3567 ext. 8164 <br />Zach.Trujillo@state.co.us <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 Robert W. Randall, Executive Director I Virginia Brannon, Director <br />OF COLO <br />I <br />IR76 <br />