2010-05-07_GENERAL DOCUMENTS - C2009087

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will be modified where necessary for use in the underground operation„ A water supply well will be drilled for supplying water to the operation. Surface drainage will pass through ditches and sediment control ponds before being discharged to Little Grassy and Grassy Creeks. Although all underground mine water is expected to be consumed in underground dust control, any excess mine water will be pumped from sumps in the portal area to sumps in the coal stockpile area, and then would discharge to pond 002. As continuous miner machines develop the workings, conveyor belts will transport coal and development waste rock to the surface. From the portal area, conveyors on the surface will transport the coal and waste rock to a handling/stockpile area where the material will be loaded into haul trucks. Coal will be transported to either off-site customers, or to the Foidel Creek Mine for processing. The development waste rock will be transported to the Foidel Creek Mine for disposal in that mine's waste pile. Surface runoff from all disturbed areas will be channeled to sediment control ponds, with the exception of runoff from a small warehouse/shop area where alternative sediment control measures will be employed. Impacts to surface water and ground water will be monitored at fifteen ground water and spoil wells, five surface water sites on streams, eight spoil spring sites, and three CDPS outfalls at sediment control ponds. The SCCC proposes to transfer 3,068 acres of land from the Seneca II Maine permit area to the PSCM permit area. The lands to be transferred are comprised of 2,024.1 acres of reclaimed lands that were disturbed by Seneca II surface mining activities and 1,043.9 acres of undisturbed lands. The PSCM will re-disturb 223.4 acres of the transferred disturbance that has previously been reclaimed, and will create 52.6 acres of new disturbance on the transferred lands. The Seneca II Mine was producing approximately 600,000 tons of coal per year in its final years of mining prior to ceasing operations in August 1999. The Seneca II Mine produced coal from the Wolf Creek, Wadge, and Lennox coal seams in the lower member of the Williams Fork Formation. Mining was conducted at the Seneca II Mine using area strip methods in two pits, the Wadge and Wolf Creek Pits. The high walls were locally auger-mined. Map 2.04.13-M3 in the PSCM permit application shows the outlines of these now-reclaimed pits. The Wadge pit mined the Wadge coal seam to depths of 100 feet. The Wadge pit was oriented northwest to southeast, and progressed in a northeast direction. The Lennox coal seam was recovered in the Wadge Pit where the Lennox was sufficiently thick. The Wolf Creek pit recovered the Wolf Creek seam to depths of 140 feet. This pit was oriented northeast to southwest, and progressed in a southeast direction. Auger mining was conducted in three areas, designated as Auger Areas B, D, and E, as shown on Exhibit 12-1 A of the Seneca II Mine permit application. Area B was in the W 1 /2 of Section 2, TSN, R87W, where augering began in June 1984 and was completed in January 1985. Area D was along the west side of the Wolf Creek Pit where augering began in December 1983, then temporarily ceased operations in March 1984, and completed mining in January 1985. Auger Area E was in the southern part of the Wadge West pits. Auger mining of Area E occurred from October 1983 and through January 1985, from March 1985 through April 1985, and in 1987. The highwall of the Auger Area E area was initially retained as a portal face-up for a future underground operation, but these plans were abandoned and reclamation has been completed. Peabody Sage Creek Mine 12 May 7, 2010