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C-f Q 82--0?j <br />qtr Twentymile Coal Company <br />?idision ?29515 Routt County Road # 27 <br />';Mining an4 <br />Oak Creek, Colorado 80467 <br />(970) 879-3800 <br />October 28, 2009 <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 />Phone: (303) 692-3603 <br />RE: PERMIT CO-0036684: THIRD QUARTER 2009 DMR SUBMITTAL <br />Dear Ms. Watson: <br />Outfall 001A (site 62) flowed each week of the period. No permit exceedances were noted. <br />Note that WET testing for 001W was conducted in July 2008. This test indicated that the effluent was not acutely toxic to <br />fathead minnows, but was toxic to Ceriodaphnia dubia survival. Accelerated testing was subsequently conducted. Three <br />consecutive tests passed. Copies of the WET test reports are attached. <br />Please t directly at (970) 870-2750 for any further questions or additional information. <br />l?l1? ;Z <br />- <br />Brian A. Watterson, R.G. <br />Geologist, Environmental Group <br />Twentymile Coal Company, <br />Enclosures <br />cc: DRMS CWPS Permit No. CO-0036684 file