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Sediment Ponds 4 and 5 aze the two remaining sediment ponds at the mine site. They are self- <br />dewatering ponds that aze constructed to treat the runoff from a 10-year/24-hour storm event and safely <br />pass the runoff from a 2S-year/24-hour storm event. These ponds have been designed and constructed <br />according the approved plan. <br />Drainage control and reestablishment is discussed below for each individual area at the reclaimed mine <br />site. These are: the portal and facilities azea, the coal stockpile azea, the Pond 1, Pond 2 and "bone <br />yard" area, the explosives bunker area, the Newlin Creek topsoil stockpile, the roadside topsoil <br />stockpile, the borrow azea, topsoil stockpile and subsoil stockpile areas, the rock dust storage tank area, <br />the Pond 3 area, the south fan area, sediment Pond 4, sediment Pond 5, the roadside ditches and <br />culverts, the refuse disposal azea and the Magpie Creek diversion. <br />Portal and Facilities Area: The regraded portal and facilities area slopes to the east at grades of 9 - <br />13%. These slopes will convey runoff from the reclaimed areas into a ditch that flows into sediment <br />Pond S. <br />Coal Stockpile Area: The regraded coal stockpile area has grades ranging from 5% - 20%. Any runoff <br />from this area will flow to the north and northeast into a ditch that flows into sediment Pond S. Some of <br />the runoff may flow through the track tunnel before entering the Pond 5 ditch and, ultimately, into Pond <br />S <br />Pond 1, Pond 2 and the "Bone Yard"Areas: The regraded Pond 1, Pond 2 and "bone yard" has grades <br />ranging from approximately S%-33%. Any runoff will flow to the north and northeast into a ditch that <br />conveys runoff into sediment Pond S. A small amount of the runoff, approximately 1 acre on the <br />eastern boundary, will flow through a small area exemption (SAE) consisting of sediment fence. EFCI <br />has provided the Division with an SAE demonstration that shows that any water leaving the site will <br />meet all applicable water quality standazds. The sediment fence is properly installed and is functioning <br />as required. The runoff from the SAE flows into Magpie Creek. <br />Explosives Bunker Area: The explosives bunker area is a small (less than 1 acre) disturbance that is <br />remote in location relative to a sediment pond. Positive drainage exists and runoff from the explosives <br />Southfield Mine Permit No. C-1981-014 <br />SL-2 Findings 26 25 April 2003 <br />