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COLORADO <br />Division of Reclamation, <br />Mining and Safety <br />Department of Natural Resources <br />Graham Roberts <br />Trapper Mining Inc. <br />P.O. Box 187 <br />Craig, CO 81626 <br />2 September 2021 <br />Re: Trapper Mine (Permit No. C1981-010) <br />Review of July 2021 Discharge Monitoring Reports <br />Dear Mr. Roberts: <br />The Division has received and reviewed the July 2021 Discharge Monitoring Reports (DMRs), <br />for the Trapper Mine. Thank you for your timely submittal of this information. The DMR's <br />were received by the Division on 24 August 2021 as an electronic submittal. <br />Trapper submits the DMRs to the Division, in accordance with Rule 4.05.13(2)(a)(iii). <br />Trapper reported that a single outfall discharged during the quarter: No Name Pond 95 (outfall <br />002A). Trapper reported that No Name Pond 95 experienced a pH exceedance. Within 48 hours <br />the situation was mitigated with the addition of carbon dioxide. TDS values for the active <br />outfalls are no longer explicitly reported. Acute monthly WET testing was also conducted. No <br />discharge occurred at the outfalls requiring WET testing. <br />The Division does not have any questions or further comments at this time. If you have any <br />questions or need additional information, please contact me. <br />Sincerely, <br />Robin Reilley, M.S. GISP <br />Environmental Protection Specialist 11 <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br />Jared S. Polis, Governor I Dan Gibbs, Executive Director I Virginia Brannon, Director <br />