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Twentymiie Coal Company <br />29515 Routt County Road # 27 <br />Oak Creek, Colorado 80467 <br />(970) 879-3800 <br />April 25, 2017 <br />Mr. Eric Mink <br />Colorado Department of Public Health and Environment <br />Water Quality Control Division - Permits and Enforcement <br />4300 Cherry Creek Drive South <br />Denver, CO 80222-1530 <br />Phone: (303) 692-3584 <br />RE: PERMIT CO -0027154 MARCH 2017 and FIRST QUARTER 2017 DMRS <br />Dear Mr. Mink: <br />During the month of March, Outfalls 003A/003Q (Pond B), 005A/ 005W/ MON5/ 005Q (all Pond D), and 006A/006Q (Pond E) <br />flowed. Outfalls 003A/0030 and005A/ 005W/ MON5/ 005Q flowed each week of the month. Outfall 006A/006Q flowed the <br />last two weeks in March. <br />Note that Outfalls 002A/002Q (Pond T), 004A/004Q (Pond C), 007A/ 007W/ MON 7/ 007Q (all Pond F), and 008A/008Q (Pond <br />G) did not flow during the first quarter. <br />Please call me directly: (970) 870-2750 with any questions. <br />Very truly yours, <br />Brian A. Watte on, P.G. <br />Geologist, Environmental Group <br />Twentymile Coial, LLC <br />Enclosures <br />cc: DRMS; CWPS Permit No. CO -0027154 file <br />