2008-12-30_PERMIT FILE - C1982057A (2)

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• Wadge Pit (Central Area) - 2,000 feet - backfilling to be completed in 2006 (dragline mined in 2002/2003, HW mined in 2005) (approved in PR-04) - 900 feet - backfilling to be completed bathe end of 2005 (PR-051 - 700 feet - backfilling to be completed by the end of 2006 (PR-051 • Wolf Creek Area ApnrT oximately 15 acres to be graded in 2006 (dragline mined 2004/2005 1) eft ungraded to allow dragline movement and coal truck haulage11'R-051 • Wadge Pit (South Area) 2,800 feet - backfilling to be completed in 2007 (dragline mined in 2003/2005, HW mined in 2006) (PR-04) 1400 feet - backfilling to be completed by the end of 2005 (PR-051 This revised variance request consists of approximately 7,400 feet of final pit and 15 acres of spoil area to be backfilled and graded. During the 15C quarter of 2005, the 1,600 feet of Ridgeline Pit, 1,000 feet of the Northern Wadge Pit, and 500 feet of the Southern Wadge Pit were backfilled and rough graded (totaling 3,100 feet). As can be seen by this revised plan, the reclamation efforts have been stepped up to achieve compliance as soon as possible. The variance areas and proposed schedule are depicted on Exhibit 19-1, Backfilling and Grading Plan. A mine progression and sequencing dates (scheduling) ate for estimation purposes only. The original dragline planning was developed to meet coal delivery contracts and could fluctuate based on power plant demand, coal orders could increase o decrease on a monthly basis. This current mine plan is based on meeting existing coal delivery contracts. The most significant disturbance is advance topsoil removal which must be completed by November 1 of each year in order to allow the overburden removal operation to continue during the winter and wet spring months. The efficient removal of topsoil at Seneca II-W is considered to be virtually impossible during the six- month period from November 1 to May 1 of any given year. Consequently, at the end of any given year, approximately one-third of the coal acreage to be mined during the next year will have been disturbed by topsoil removal activities. The total annual disturbed acreage figures in the table include the coal areas mined and the advance topsoil removed areas, as well as the other disturbances including spoil areas, existing and proposed haul roads, power lines, storage yards, and facilities. TR-61 7 Revised 10/08