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October 6, 2015 <br />Chris Gilbreath <br />Colowyo Coal Company L.P. <br />1100 West 116th Avenue <br />Westminster, CO 80234 <br />RE: Colowyo Mine, Permit C-1981-019 <br />Review of Discharge Monitoring Reports, first and second quarters 2015 <br />Dear Mr. Gilbreath: <br />The Colorado Division of Reclamation, Mining and Safety reviewed and found the above referenced reports <br />to be in compliance with Rule 4.05.13(2). <br />Seven CDPS outfalls were observed discharging during the first quarter: <br />• Streeter Pond, Outfall 001A <br />• Work Area Pond, Outfall 002A <br />• Gossard Pond, Outfall 003A <br />• Stoker Siding Pond, Outfall 005A <br />• Prospect Pond, Outfall 007A <br />• East Taylor Pond, Outfall O1 OA <br />• West Taylor Pond, Outfall 011A. <br />During the second quarter, all of these but the Work Area Pond were discharging at the time of <br />monitoring. Also, the Section 16 Pond (Outfall 009A) was found to be discharging during the second <br />quarter. <br />Colowyo's surface water monitoring of CDPS outfalls revealed no exceedances of primary effluent <br />limitations during either of the two quarters. <br />If you have any questions feel free to contact me at Rob.ZuberCa�state.co.us or (303) 866-3567, extension <br />8113. <br />Sincerely, <br />Robert Zuber, P.E. <br />Environmental Protection Specialist <br />n 0 <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 Mike King, Executive Director Virginia Brannon, Director' ` ri <br />