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TCC immediately notified the Colorado Division of Reclamation, Mining, and Safety (CDRMS), <br />Colorado Department of Public Health and Environment (CDPHE), U.S. Army Corps of Engineers <br />(USAGE), and Colorado Division of Wildlife (CDOW). TCC subsequently met with representatives of <br />the CDRMS and CDOW on-site to review site conditions, update them on immediate control and <br />mitigation activities, and work with them to develop clean-up plans. During the site review with the <br />CDOW, active fish and aquatic life were observed in the affected stream segment. <br />The limit of downstream migration of the slurried material was identified as a point on TCC property <br />approximately 2.5 miles downstream from the point of discharge and approximately 3.0 miles above the <br />confluence of Foidel Creek with Middle Creek. At this point, aloes-lying marshy area acted as a natural <br />trap to prevent further migration of the slurried material. A water quality sample was also obtained at <br />this point. Beyond the marshy area, a segment of Foidel Creek about one-half mile long was dry due to <br />low-flow conditions. <br />• Containment at the limit of downstream migration, and the dry segment in Foidel Creek prevented any <br />immediate downstream effects due to the accidental discharge. Elevated flows could result in some of <br />the slurried material being picked-up and carried downstream, however, flow contributions from Foidel <br />Creek are small relative to total flows in the Middle, Fish, and Trout Creek systems, so any downstream <br />effects may not be detectable due to normal stream dilution. <br />• Subsequent inspection of the portion of the Foidel Creek channel affected by the accident discharge, <br />indicated that most of the deposition of coal and rock fines resulting from the discharge occurred within <br />approximately the first half-mile of the stream channel (on TCC property). TCC is also continuing <br />water quality sampling of several points on Foidel Creek downstream of the discharge point. <br />• TCC's ongoing clean-up efforts include reestablishment of stormwater storage/treatment capacity in <br />Pond E and clean-up of the affected portion of Foidel Creek. Clean-up will involve removal of any <br />significant deposits of rock and coal fines from the affected stream channel to minimize downstream <br />movement of these materials with higher stream flows. TCC is also investigating options <br />(improvements to maintenance, inspection, and monitoring programs) to prevent and/or provide for <br />early detection of any similar situation in the future. <br />If you would like to obtain additional information or have specific questions, please contact me at (970) 870- <br />2712. <br />Sincerely yours, <br />Twentymile Coal Company <br />Jerry M. Nettleton <br />Environmental Manager <br />