Laserfiche WebLink
Peabody <br />Twentymile Coal Company <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />970.879.3800 <br />October 28, 2008 <br />RECEIVED <br />OCT 3 0 2008 <br />Division Oi muc`arnation, <br />Mining and Safety <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 COG-850000. FACILITY NUMBER COG-850048 THIRD QUARTER 2008 DMR <br />SUBMITTAL <br />Dear Ms. Watson: <br />Please find attached the above referenced discharge monitoring report for the period July 1, 2008 <br />through September 30, 2008, for Outfall 001A/001W (site 10RT). Please forward to the <br />appropriate person. This is the first report for this site, which is an emergency permit issued in <br />August 2008 through Andrew Neuhart. <br />The discharge source is groundwater that had been flooding portions of our underground mine. <br />Discharge did not begin until September 2008. Note that we have not received DMR carbon <br />sheets, so I have generated the DMR electronically. Please let me know if they require some <br />modification for future reporting. <br />Outfall 001A/001W discharged each week in September. No exceedances were noted with the <br />exception of the 30 day average of total recoverable iron. This may be an anomaly as historic <br />analysis of this groundwater has indicated TR iron typically in the 0.2 to 0.3 mg/I range. <br />Additional water quality analysis for October is pending for confirmation. Note that TCC had <br />requested proposals for water treatment from multiple consultants in September (prior to <br />obtaining the September TR iron analysis). Initial proposals are under review. <br />WET testing was conducted in September for 001W. Analytical results indicated that the effluent <br />was acutely toxic to Cerodaphnia. A copy of the laboratory test results is attached. In talking to <br />the laboratory they indicated this may be the result of sulfate concentrations in the water. We are <br />currently examining aeration to remedy this situation. <br />Very truly y urs, <br />Brian A. Watte , P.G. <br />Geologist, Environmental Group, <br />Twentymile Coal Company <br />Enclosures <br />cc: DBMS CWPS Permit No. CO-0042161 file