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Twentymile Coal Company <br />29515 Routt County Road # 27 <br />RC!'` ~(~~ ~ Oak Creek, Colorado 80467 <br />~GV (970)879-3800 <br />pPR 'L 0 2001 <br />Divis~cn of Reclamar~on, <br />Mining and Safety <br />April 17, 2007 <br />Mr. Ray Nalepa <br />Colorado Department of Public Health antl Environment <br />Water Quality Control Division -Permits and Enforcement <br />4300 Cherry Creek Drive South <br />Denver, CO 80222-1530 <br />Phone:(303j692-3603 <br />RE: PERMIT CO-0027154: MARCH 2O07/1ST QUARTER 2007 DMR SUBMITTALS <br />Dear Mr. Nalepa: <br />C--I q ~z c~ s~ <br />Enclosed, please find the above referenced discharge monitoring reports For the period March 1, 2007 through March 31, <br />2007. During this period, Ponds T (Outtall 002A), 6 (Outtall 003), D (Outtall 005A), E (Outtall 006A), F (Outtall 007A), and G <br />(Ouffall OOSA) discharged to Foidel Creek. No permit excursions were noted for this period. Outfalls 002A and 007A <br />discharged the last two weeks of the period. Outtall 003A discharged the last 3 weeks of the period. Outfalls 005A and 008A <br />discharged the last three weeks of the period. Outtall 006A discharged all but the last week of the period. No permit <br />exceedances were noted. <br />Quartedy Whole Effluent Toxicity (WET) tests were conducted for Outtalls 005W and 007W in March 2007. Both tests <br />indicated that the effluent were not acutely toxic to Daphnia magna survival (see attached laboratory reports). <br />Outtall 004A (Pond C), did not discharge; and therefore had no chemical tests during the period. Outfall 020A/020W has not <br />yet been constructed, therefore sampling of this site has not occurred. Note that ponds A (Outtall 001A/001W), and H (Outtall <br />009A) have been deactivated following bond release, and have been removed from the newly amended permit, effective <br />January 1, 2003. In ortler to reduce the amount of paper work, the following certification will be substituted for the actual <br />DMR forms to cover the outtalls, which did not discharge. <br />CERTIFICATION <br />I certify under penalty of law that I have personally examined and am familiar with the information submitted herein; and <br />based on my inquiry of [hose individuals responsible for obtaining the information, I believe the submitted in/ormation is <br />true, accurate, and complete. 1 am aware that there are significant penalties for submitting false information, including [he <br />possibility of line and imprisonment. See 18 U.S.C. § 1001 and 33 U.S.C. § 1319. {Penalties untler these statutes may <br />include fines up to $10,000 and/or maximum imprisonment of between 6 months and 5 years.) <br />v~~ `~ / v <br />Brian A. Watterso~ist Date <br />Please contact me at (970) 870-2750 with any further questions. <br />~S. ~ ~~~ <br />Brian A. Watterson, P.G. <br />Geologist, Environmental Group <br />Twentymile Coal Company <br />enclosures <br />cc: DMG; CWPS Permit No. CO-0027154 file <br />