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~q~a~5~ <br />000 <br />OC~f 2 9 2003 <br />Division of Minerals and Geology <br />Twentymile Coal Company <br />29515 Routt County Road # 27 <br />Oak Creek, Colorado 80467 <br />(970) 879-3800 <br />October 24, 2003 <br />Ms. Carla Lenkey <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: 3RD QUARTER 2003 DMR SUBMITTAL <br />Dear Ms. Lenkey: <br />Please find enclosed the above referenced discharge monitoring reports for the period from July 1, <br />2003 through September 30, 2003, for Outtalls 001A (site 115), 002A (300E), and 3001. Note that <br />Outtall 001A did not discharge during the quarter until September 18~', continuing through the end of <br />September. <br />Outtall 002A did not flow during the month of July, flowed during the third and fourth full weeks in <br />August, and only during the first two weeks of September. Limited flow from 002A may be the result of <br />evaporation during the summer, and that TCC drained the first of three waste water receiving ponds in <br />order to dredge sludge from the pond during the summer. The first receiving pond has been slow to <br />refill, and is anticipated to reach former levels in October. 3001 flowed each week of the period. No <br />permit limitation exceedances occurred during this period. <br />A Quarterly Whole Effluent Toxicity (WETj test was collected for Outfall 001 W in September 2003. This <br />test indicated that the effluent was not acutely toxic to Daphnia magna survival. Copies of the WET <br />Test Report Form is attached. <br />Please contact me directly at (970) 870-2750 with any questions. <br />Brian A. Watterson, R.G. <br />Environmental Specialist <br />Enclosures <br />cc: DMG CWPS Permit No. CO-0042161 file <br />