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,~,,,., nrrL1CATI0N FOR PERMIT FOR SURFACE OR UNDERGROUND MINING ACTIVITIES -- <br />HINIMUM REQUIREMENTS FOR OPERATION AND RECLAMATION PLANS. <br />2.05.6 riitigation of Surface Coal Mining Operation Impacts. (Cont'd.) <br />(3) (b) (i) (Cont'd.) <br />- feet wide and 350 fee[ in length. Tne drain <br />consisted of a prefabricated drain core ("Mir- <br />adrain 4000") and perforated 4" PVC pipe laid <br />in a trench and backfilled with imported gran- <br />ular material. Tne [op of the trench was <br />backfilled wish approximately one foot of nat- <br />ural soil. Flows from the french drain were <br />directed to East Roatcap Creek through a fl- <br />inch corrugated plastic pipe laid on Che <br />ground surface. After cessation of operations <br />and final reclamation of the OVWM, the rock <br />toe buttress and french drain would remain in <br />place, but the corrugated drain pipe would be <br />removed and replaced by a riprapped channel or <br />half culvert. <br />Train Loadout Drainage Control Plan. <br />The [rain loadout drainage plan consists of <br />retaining run-off water from [he sixteen-acre <br />disturbed area in a 1.8 acre-foot sedimenta- <br />tion pond. For specific details on [his <br />structure (design criteria, etc.) see Section <br />2.05.3(3)(b) and Map 8A-2 in Volume BA. <br />• Run-off is directed to the sedimentation pond <br />from the [rain loadout area by means of a con- <br />. strutted downgrade, The shop area naturally <br />flows by gravity to the sedimentation pond. <br />The western end of the train loadout area near <br />the truck dump station drains over the fill <br />slope to the drainage along the railroad <br />tracks. Run-off from the railroad track <br />drains downgrade to the sedimentation pond. <br />The rur.-off is contained within a berm on the <br />south side of the spur at the train loadout <br />building. Map 8-3 shows drainage plans in <br />this area. <br />Coal Stockpile Drair.a¢e Control Plan <br />A sedimentation pond with .35 acre-ft. of <br />storage volume receives run-off from the coal <br />stockpile area. Tne "V" ditches constructed <br />around the perimeter and [he constructed grade <br />of the area carries run-off to the sedimenta- <br />tion pond, See Section 2.05.3(3)(6) and Draw- <br />ings LO1R0004 and LO1R0005 in the Ponds, Im- <br />poundments, and Dams Appendix, Volume 8A, for <br />further information on the pond and drainage <br />designs. <br />Revised 08/01/84 <br />Added O1 /06 /S7 <br />Revised 10/O1r87 <br />Revised 03/28;88 <br />