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MOUNTAIN CObL <br />COMPaNV~.~~. <br />A Subsidiary of Arch Western Resources, LLC <br />June 30, 2005 <br />Mr. James Burnell <br />Colorado Division of Minerals and Geology <br />Office of Mined Land Reclamation <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />RECEIVED <br />JUL 05 2005 <br />Division of S{inerals d Geology <br />West Elk Mine <br />P.O. Box 591 <br />5174 Highway 133 <br />Somerset, CO 81434 <br />(970)929-5015 <br />Fax (970)929-5595 <br />Re: Mountain Coal Company L.L.C. (MCC), West Elk Mine; Permit No. C-80-007; Research <br />Publication Information on Sediment Runoff Control Techniques. <br />Dear Mr. Burnell: <br />Here is some information Mountain Coal Company recently received pertaining to Sediment Runoff <br />Control Techniques. The abstract from the article entitled, "Control of Sediment Export from the <br />Forest Road Prism" indicates of the four runoff control methods commonly used to control road runoff <br />and sediments (vegetation, rip-rap, sediment fences, and settling basins), rip-rap was significantly less <br />effective at reducing run-off concentration. Sediment basins were very effective, but during smaller <br />storm events, not during the largest flows because they overflowed. The abstract from the other <br />publication entitled, "Evaluating the Effectiveness of Post fire Rehabilitation Treatments" indicates <br />that of the available treatments, contour-felled logs show promise as an effective hill slope treatment <br />because they provide some immediate watershed protection, especially during the first post-fire yeaz. <br />Phis information is provided for informational purposes. Mountain Coal Company is interested in <br />using slash as a sediment control technique and we appreciate your consideration of that methodology <br />as we move forwazd. <br />Si '~~~~ <br />~, ;bwt~ti~ <br />A. B e <br />Environmen Engineer <br />cc: P Schmidt <br />M Peacock <br />