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PeabRdq <br />Twentymile Coal Company <br />29515 Routt County Road #27 <br />Oak Creek, CO 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 />RE: PERMIT CO -0042161: FIRST QUARTER 2017 DMR SUBMITTAL <br />Dear Mr. Mink: <br />Please find enclosed the above referenced discharge monitoring reports for the first quarter of <br />2017, for Outfalls 001A/001W/MON1 (all site 115), and 002A (sites 300E and 3001). Outfall <br />001A/001W/MON1 discharged the last week of the period. <br />Sites 300E and 3001 flowed during the months of January, and February, but did not discharge in <br />March. One exceedance was noted, it was for the 30 day average of BOD 5 -day in February. <br />If you have any questions, please contact me directly at (970) 870-2750. <br />Best Regards, <br />Brian A. Watterson, P.G. <br />Geologist, Environmental Group, <br />Twentymile Coal Company <br />Enclosures <br />cc: DRMS CWPS Permit No. CO -0042161 file <br />