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I~ <br />Twentymile Coal Company <br />29515 Routt County Road # 27 <br />Oak Creek, Colorado 80467 <br />(970)879-3800 <br />RECEIVED <br />April 28, 2006 hlpY ~ 4 2006 <br />Ms. Tanya W atson Division of Minerals d Geology <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-0027154: MARCH 2006/1 ST QUARTER 2006 DMR SUBMITTALS <br />Dear Ms. Watson: <br />Enclosed, please find the above referenced discharge monitoring reports for the period March 1, 2006 through March 31, <br />2006. During this period, Ponds D (Outfall 005A), E (Ouffall 006A), F (Ouffall 007A), and G (Ouffall 008A) discharged to <br />Foidel Creek. No permit excursions were noted for this period. Ouffall 004A discharged only during the last week of the <br />period. Outfalls 005A, OO6A, and 007A flowed each week of the period. Outfall OOSA discharged during the last fwo weeks of <br />the period. No permit exceedances were noted. <br />Quarterly Whole Effluent Toxicity (WET) tests were conducted for Ouffalls OOSW and 007W in March 2005. Both tests <br />indicated that the effluent were not acutely toxic to Daphnia magna survival (see attached laboratory reports). <br />Outfalls 002A (Pond T), 003A (Pond B), and 004A (Pond C), did not discharge; and therefore had no chemical tests during the <br />period. Outfall 020A/020W has not yet been constructed, therefore sampling of this site has not occurred. Note that ponds A <br />(Outfall 001A/001W), and H (Outfall 009A) have been deactivated following bond release, and have been removed from the <br />newly amended permit, effective January 1, 2003. In order to reduce the amount of paper work, the following certification will <br />be substituted for the actual DMR forms to cover the ouffalls, which did not discharge. <br />CERTIFICATION <br />I certi/y under penalty of law that 1 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, 1 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 o/ line and imprisonment. See 18 U.S.C. § 1001 and 33 U.S.C. § 7319. (Penalties under these statutes may <br />include (fines up to $10,000 and/or maximum imprisonment of between 6 months and 5 years.) <br />~ ~' ~~- y z P Q.6 <br />Brian A. Watlerson, Geologist Date <br />Please cont~ayct~me at (970) 870-2750 with any further questions. <br />Q,~. ~/Y <br />Brian A. Watterson, R.G. <br />Geologist, Environmental Group <br />Twentymile Coal Company <br />enclosures <br />cc: DMG; CW PS Permit No. CO-0027154 file <br />