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January 26, 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 />Phone: (303) 692 -3603 <br />Twentymile Coal Company <br />29515 Routt County Road # 27 <br />Oak Creek, Colorado 80467 <br />(970) 879 -3800 <br />RE: PERMIT CO- 0027154; DECEMBER & FOURTH QUARTER 2012 DMR SUBMITTALS <br />Dear Ms. Watson: <br />During the month of December 2012, only one outfall flowed: 005A/MON5 /005W (all same site - Pond D). The site flowed <br />each week of the period. No exceedances were noted <br />Quarterly Whole Effluent Toxicity (WET) tests were collected for analysis for Outfall 005W during the period. 007W did not <br />flow during the quarter The test indicated that the effluent was not acutely toxic to Daphnia magna survival (see attached <br />laboratory report) <br />The following certification is provided to verify that that the following the outfalls, did not discharge during the third quarter of <br />2011 These included Outfalls 002A (Pond T), 003A (Pond B), 004A (Pond C), 006A (Pond E), 007A/007W /MON7 (all Pond <br />F), and 008A (Pond G). <br />Brian A. Watterson, Geologist <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 those individuals responsible for obtaining the information, I believe the submitted information is <br />true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the <br />possibility of fine and imprisonment. See 18 U.S C. § 1001 and 33 U.S.C. § 1319 (Penalties under these statutes may <br />include fines up to $10,000 and /or maximum imprisonment of between 6 months and 5 years.) <br />Date <br />Please call me directly: (970) 870 -2750 with any questions. <br />Very truly yours, <br />Brian A. Watterson, P.G. <br />Geologist, Environmental Group <br />Twentymile Coal Company <br />enclosures <br />cc: DRMS; CWPS Permit No. CO- 0027154 file <br />