2012-02-16_REVISION - M2002020 (9)

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Aspect Reclamation Operation Quantity Units Unit Cost ($) Cost ($) A. Slurry Wall Construction - 5,000 , ft x 60, ft 1. Excavation and backfill I 300,000 I SF I 12.00 I 3,600,000 B. Site Grading - reservoir top bank following slurry wall construction; mining cell side slopes for added stability; selected areas of site to facilitate revegetation 1. Reservoir top bank and slopes, 2 ft x 10.5 acres 33,880 CY 0.85 28,798 2. Selected areas, 2 ft x 5 acres 16,133 CY 0.85 13,713 C. Overburden /Topsoil Placement - internal haul roads, processing facility, and other miscellaneous areas 1. Place material, 1 ft x 17 acres I 27,427.0 I CY I 1.25 I 34,284 D. Revegetation - complete for newly disturbed areas and partial for undisturbed and previously reclaimed areas 1. Complete seed and mulch, 32.5 acres 32.5 Ac 675 21,938 2. Reseed 20% 6.5 Ac 675 4,388 3. Partial seed and mulch, 40 acres 8.0 Ac 675 5,400 Total Disturbance Costs Contractor Mobilization/Demobilization (8 %) Overhead (18.5 %) Administration (5 %) 0.08 0.185 0.05 $3,708,520 $296,682 $686,076 $185,426 Total Proposed Financial Warranty $4,876,704 Disturbed Acreage Financial Warranty per Acre 72.5 $67,265 Reclamation Costs In order to calculate maximum potential reclamation liability to the State, we have selected a point in time where reclamation costs could be at a maximum. Since the final land use is developed water storage, the time of maximum disturbance is prior to any slurry wall construction. Each aspect is listed in the following table with associated disturbed area. Please refer to Exhibit D, Mining Plan, for a listing of disturbed areas that total 72.5 acres. This estimate will follow the same order as the listing in Exhibit D. Greeley 25 Avenue Site DRMS 112 Permit Amendment Application EXHIBIT L Page 29