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Through the approval of Permit Revision PR -06, the K -Pit is divided into two main blocks: a <br />dragline block and a truck/loader block. The dragline block is one pass wide, along the ridge <br />top. This block generally runs west to east. The truck/loader block is further divided into three <br />main blocks (A, B, and C), with each block further divided into cuts with an average width of <br />105 feet for truck and loader benches. Mining in the truck/loader block will begin in Block B, <br />Cut 1. Each cut is further divided into mining horizons. The horizons were developed for a <br />loader with an assumed maximum digging depth of 30 feet, which is the maximum horizon <br />height. <br />Removal of Topsoil and Overburden <br />Prior to disturbance, and in advance of the pits, brush is cleared and topsoil is removed and <br />salvaged. Topsoil is stockpiled only if a live -haul replacement area is not available in the area. <br />If stockpiled, piles are shaped and seeded to establish vegetation for protection from wind and <br />water erosion. After topsoil removal, the overburden is drilled and blasted in advance of the pit. <br />Overburden is then stripped by draglines, scrapers, truck/loader or bulldozers. Finally, front -end <br />loaders load coal into 90 -ton haul trucks, which deliver the raw coal to the Craig Power Plant. <br />Trapper removed 24.6mm BCY of spoil material in the K -Pit and placed the material in a <br />permanent fill that is known Horse Gulch Fill. Additional spoil from the K -Pit is also placed <br />north of the pit and elsewhere on the site to meet the requirements of the post mine topography. <br />Much of this overburden is located within the landslide that occurred in K -Pit in October 2006. <br />The Horse Gulch fill was nearly completed at the end of the 2008 -2012 permit term. The only <br />portion of Trapper's operation that is located downslope from the Horse Gulch Fill is Trapper's <br />Horse Gulch sediment control pond. An underdrain was constructed beneath the Horse Gulch <br />Fill. <br />Trapper Mine 16 July 9, 2013 <br />