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Rifle Gravel Pit #1 January 2021 (Amendment to File No. M-2020-008) <br /> 13.0 Exhilbit l!_ — Rer.;lamation Costs <br /> The worst-case reclamation scenario at the Rifle Gravel Pit will be when the greatest backfill <br /> is required and will occur sometime within the mining process of the north and south pods <br /> and along the dewatering pipeline after mining is completed. <br /> • Backfilling/regrading approximately 42,592 yds2 (8.8 acres) of mining slopes and the <br /> dewatering pipeline alignment at a cost of$1.50/CY = $63,888. <br /> • Replace topsoil on disturbed areas, assuming excavation areas, materials storage, <br /> and topsoil storage areas, 81,699 yds2 (16.88 acres) at $1.50/CY = $122,548. <br /> • Seeding and erosion control on 16.88 acres @$700/acre = $11,816. <br /> o This includes the dewatering pipeline <br /> Based on these costs, and a 28% DRMS cost factor, the total bond for the Rifle Gravel Pit <br /> will be $253,762. <br /> Table 6. Reclamation Costs <br /> Activity Description Time Months Cost $ <br /> Backfill includes the dewatering i eline 1 $63,888 <br /> Replace topsoil on all disturbed areas 1 $122,548 <br /> Seed and mulch all top soiled areas 0.5 $11,816 <br /> Sub-Total 2.5 $198,252 <br /> DRMS Costs $55,510 <br /> 28% x direct costs <br /> Total Bond Amount $253,762 <br /> 49 <br />