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iii iiuiiiiiiiii iii <br />~aa <br />Twentymile Coal Company <br />29515 Routt County Road q 27 <br />Oak Creek, Colorado 80467 <br />(970)879-3800 <br />RECEIVED <br />UUL 31 2001 <br />July 2s, 2001 Division of Minerals & Geology <br />Ms. Carla Lenkey <br />Colorado Depanment of Public Health and Environment <br />Water Oualiry Control Division -Permits and Enforcement ~7_ <br />4300 Cherry Creek Drive South ~ ~ ~(~ MX{ <br />Denver,C080222-1530 I '_I <br />RE: PERMIT CO-0036664; 2ND QUARTER 2001 DMR SUBMITTAL <br />Dear Ms. Lenkey: <br />Please find enclosed the above referenced discharge monitoring reports for the period from April 1, 2001 through June 30, <br />2001. No permit limitation exceedences occurred during the period. <br />Quarterly Whole Effluent Toxicity (WET) tests were conducted for Outfall 001 the week of May 22, 2001. This site passed for <br />both species, with "Concentrations with Statistically Significant Difference in Lethality" reported at 100°/ for P. Promelas and <br />>100%for C. Dubia. Copies of the CDPS WET Test Repon Forms for both species are included with this subminal. <br />Please contact me at (970) 870-2750 for any further questions or additional information. <br />Twentymile Coal Company <br />Sandra White <br />enclosures <br />~'i'` . <br />CWPS Permit No. CO-0036684 fie <br />