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2. Topsoil replacement <br />3. Revegetation <br />4. Facility reclamation <br />Indirect Costs <br />1. Mobilization and demobilization <br />2. Engineering redesign fee <br />3. Contractor profit and overhead <br />4. Reclamation management fee <br />5. Public liability insurance <br />6. Contractor's performance bond <br />Backfilling and Grading <br />The first major phase in the reclamation of r <br />process is discussed in detail in the Backfilli <br />mining will usually cause some deviation <br />estimated postmining topography, postminir <br />The first step is the determination of vole <br />determine the volume of material and an <br />greatest volume then determined this pa <br />coal thickness values, as determined by <br />RANGER. This range diagram was the b; <br />for all pit areas. <br />Postmine slopes were then superimposed <br />all spoil would be graded towards the op~ <br />5H:1 V. This produced a final topography tl <br />flow through the pit area without impoundir <br />standing spoils behind the open pit. l <br />reclamation grading is current to within two <br />ied land is backfilling and grading the open pits. Although this <br />i and Grading Plan found in Tab 20, an unplanned cessation of <br />om the original plan. Early cessation generally affects the <br />drainages, and the resulting volumetric celculatigns. <br />• <br />Originally, a computer program called STAMP was used to • <br />ge° depth of overburden in the last pit in any one year. The <br />year would be the "worst case" scenario. Overburden and <br />\MP, were used in a range diagram computer program called <br />for future volume calculations. A pit width of 110 feet was used <br />the diagrams. For the sake of continuity, it was estimated that <br />pit at 5H:1V slopes. All highwall slopes would be reduced to <br />could not only be revegetated, but would also allow drainage to <br />voter. It was also assumed that in all cases there would be four <br />is a very conservative estimate because, in most cases, <br />I piles. <br />A digitizer was used to balance the cut an fill volumes of material needed to create the above-described <br />topography. A swell factor of 15.3 percent was utilized based on studies discussed in Chapter 20 for the <br />bonding estimate. The two adjacent spoils ould be dozed into the open pit and the two back (furthest from <br />the pit) spoils would be graded into the a 'scent v's created by the spoil (see appropriate worksheets in <br />Attachment 25-1). <br />J <br />PR04 2 Revised 09/04 <br />