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pGrFIVED <br />West Elk OCT 13 1995 <br />Small Area Exemptio iS;o~l~m,Ar~/aueo~ogy <br />Lone Pine Gulch Fan Bench, ~taging Area, and <br />Topsoil Storage Pile <br />e~,r.~z:~~riW~~~~~,~Y~~:~~~.~:x,:~:~::::::y.~.r~~~_~=~:.~~,..:~.~.~2..~~.~wm~.~....~.~~~.~~~.~.~y~s.~~r.~.~.~~Axs~mM <br />1. INTRODUCTION <br />This modification (12 October 1995) incorporates the following changes (italicized at locations <br />indicated) to the features described in, and the documentation of, the 3 July 95 demonstration: <br />the addition of a statement regarding best management practices (see paragraph 1.3.2); the <br />addition of a statement regarding maintenance (paragraph 8); the use of Soil Guard on the fan <br />bench cut slope (paragraphs 1.3.2, 4.2, 4.3.3, 4.4); depiction of where D-1 breaks across the <br />light-use road above the underground development waste pile and below the topsoil pile <br />(Enclosure 1 and paragraphs 1.3.2); depiction of Watershed 1 (Enclosure 2 and paragraph 1.3.2) <br />and clearer portrayal of contours on Enclosure 2; and elimination of the clean water reference <br />to Ditches D-1 and D-4 (paragraph 1.3.2). Other changes include reference to a recent site visit <br />by the undersigned (paragraph 1.1), the use of riprap and silt fencing to distribute Culvert C-4 <br />discharges into a vegetative filter (paragraph 1.3.2); and re-sizing of the straw bale distribution <br />structure and the vegetative filter associated with C-3 (paragraph 7). Enclosure 3 was edited, <br />•" and Enclosure 4 revised to include Watershed 1R. Enclosure 17 was revised to demonstrate the <br />adequacy of the reconfigured vegetative filter below Culvert C-3. Unaffected elements of <br />previous review and analyses are brought forth into this review and analysis unchanged. <br />This revised analysis is still conservative (predicted impacts greater than likely) in estimating <br />adverse impacts associated with water quality. Eventually, the staging area will be lowered as <br />material is removed to cover the development waste pile. The topsoil pile is not as high or top <br />surface slopes as extreme as depicted due to less disturbance than envisioned. In addition, some <br />of the topsoil stockpile will be used to cover the Development Waste Pile. <br />1.1 Methods of Analysis <br />This analysis is made using the Sediment, Erosion, Discharge by Computer Aided Design <br />(SEDCAD+ Version 3) developed by Ms. Pamela J. Schwab of Civil Software Design and Dr. <br />Richard C. Warner, Agricultural Engineering Department, University of Kentucky. This review <br />is based on field information provided by Kathleen Welt (Environmental Supervisor, West Elk <br />Mine, Mountain Coal Company) and a site visit (August 25, 1995) by the undersigned. <br />• (Lone Pine Gulch SAES Demonshaeon, 12 Ocrober 95, Page 1 of 13) <br />