Laserfiche WebLink
EXHIBIT L <br />Reclamation Cost Estimate <br />In order to calculate maximum potential reclamation liability to the State, we have selected a <br />point in time where the mining disturbance could be at its maximum. This point occurs near the <br />end of the mining operation. The maximum mining disturbance illustrated in the table occurs <br />during the mining of Cell 4, prior to mining in Cell 5. Overburden has been stripped in <br />anticipation of future mining and backfilled areas requiring grading and seeding are present. The <br />mining disturbance will be at its greatest when the northern portion of Ce114 has been mined out <br />and the mining face is nearing the southern portion of the cell. At this time, Cell 1 will be <br />backfilled, the exterior walls of Cell 2 will be graded and seeded, and Cell 3 side slopes will be <br />graded and seeded. Portions of Cells 2, 3, or 4 may also be in use as sedimentation basins, but, <br />in general, reclamation of Cells 2 and 3 as groundwater lakes will be complete. Although <br />reclamation along the exterior walls of Cell 4 will be in progress, the mining face will at its <br />greatest length. Please refer to the revised Exhibit D, Mining Plan, for a listing of disturbed <br />areas that total 52.5 acres. This estimate will follow the same order as the listing in Exhibit D. <br /> Unit Cost Cost <br />As ect Reclamation O eration uanti Units $ $ <br />A. Stripped Overburden and Topsoil in <br /> Anticipation of Mining <br /> 1. Replace overburden, 6" x 30 acres 24,200 CY 1.25 30,250 <br /> 2. Replace topsoil, 6" x 30 acres 24,200 CY 1.25 30,250 <br /> 3. Seed and mulch 30 Ac 800 24,000 <br /> 4. Reseed 20% 6 Ac 800 4,800 <br />B. Active Mining Face, 1, 000 feet <br /> 1. Backfill slope to 3H:1 V 45,000 CY 1.25 56,250 <br /> 2. Replace topsoil, <br /> 6" x 16 ft x 1,000 ft 300 CY 1.25 375 <br /> 3. Seed and mulch 0.4 Ac 800 320 <br /> 4. Reseed 20% 0.1 Ac 800 80 <br />C. Exterior Cell Wall being Bac>~lled, <br /> 1, 000 feet <br /> 1. Backfill slope to 3H:1 V 45,000 CY 1.25 56,250 <br /> 2. Replace topsoil, <br /> 6" x 16 ft x 1,000 ft 300 CY 1.25 375 <br /> 3. Seed and mulch 2,0 Ac 800 1,600 <br /> 4. Reseed 20% 0.4 Ac 800 320 <br />D. Top of Slope and Side Slope Seeding <br /> 1. Seed and mulch 3.5 Ac 800 2,800 <br /> 2. Reseed 20% 0.7 Ac 800 560 <br />Platte Ya[ley Oper¢ti¢n <br />DMG 771 Permit Amendment <br />Page 23 <br />