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Peobodq <br />Twentymile Coal Company <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />970 879 3800 <br />July 27, 2012 <br />Ms. Tania Watson <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; SECOND QUARTER 2012 DMR SUBMITTAL <br />Dear Ms. Watson <br />Please find enclosed the above referenced discharge monitoring reports for the second quarter of <br />2012, for Outfalls 001A/001W/MON1 (all site 115), and 002A (sites 300E and 3001). One <br />exceedance was noted: 300E exceeded the 30 day average for TSS (92 mg /L versus the limit of <br />75 mg /L) in April. It's not clear why we had the high reading, but only one sample was collected <br />for that month. TSS dropped to 14 mg /L in May, and there was no flow in June. <br />Outfall 001A/001W/MON1 did not discharge during the period. 002A (sites 3001 and 300E) <br />flowed during April and May, but 300E did not discharge in June due to low precipitation and hot <br />weather. <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 />RECEIVED <br />AUG 0 1 2012 <br />Division of Reclamation, <br />Mining and Safety <br />