2013-06-12_PERMIT FILE - C1994082 (5)

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associated costs related to the worst -case reclamation costs. Estimated costs to reclaim the disturbed area are categorized under the headings of: Direct Costs • Highwall Reduction and Backfilling and Rough Grading • Ripping Tasks • Road Reclamation • Finish Grading • Drainage Control System Installation/Removal • Topsoil Replacement • Borehole Sealing and Facilities Demolition • Revegetation • Misc. Reclamation Tasks • Mobilize/Demobilize Equipment Indirect Costs • Liability Insurance (2.02% of Direct Cost) • Performance Bond (1.05% of Direct Costs) • Job Superintendent (at $39.38/hr) • Profit (10.0% of Direct Costs) Contract Amount (Direct + Indirect Costs) • Engineering Work and Contract/Bid Preparation (4.25% of Contract) • Reclamation Management and Administration (3.25% of Contract) Total Bond Amount (Contract + Engineering + Reclamation Management) RECLAMATION TASKS The following discussions present a general overview of the methodologies used to determine and calculate a worst -case reclamation liability cost. Highwall Reduction and Backfilling and Rough Grading The first major phase in the reclamation of mined land is backfilling and grading the open pits. Although this process is discussed in detail in the Backfilling and Grading Plan found in Tab 20, an unplanned cessation of mining will usually cause some deviation from the original plan. Early cessation generally affects the estimated postmining topography, postmining drainages, and the resulting volumetric calculations. The first step is the determination of volumes. A range diagram is generally the basis for postmine volume calculations. A pit width of 110 feet was used for all pit areas. Postmine slopes can then superimposed on the diagrams. For the sake of continuity, it was estimated that all spoil would be graded towards the open pit at 5H:1 V slopes. All TR -53 2 Revised 05/13