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orst CaseJteclamation Costs and Timetable [Before Substitnte Water Suo~ly Plan in <br />This worst case assumes that the fu110.4 acres of wetland shelf will be created since the existing <br />pond will be mined. To limit the extent of the bond, the operator commits to mine only Phase 1 <br />prior to the water supply plan being in place. Mining in Phase 2 will only take place if the water <br />supply plan is in place or the bond has been recalculated to reflect the additional liability. <br />Since the augmentation plan and substitute water supply plan have not yet been obtained at the <br />time that this application is being filed, the worst case cost for reclamation of the site will occur <br />when Phase 1 has been mined out, and the site needs to be backfilled to a level 2 feet above the <br />expected water surface so that no evaporation occurs from the lake. Based on the expected water <br />level of 5588' and the bottom of excavation at 5575', this means that the fill would be placed to <br />5590' or I S' from the bottom. From the Survcadd pit analysis shown in the mining plan, this corre- <br />sponds to a volume of 77,000 cubic yards. <br />Task # Description Time (days Coat <br />1 Dewater Phase 1 to allow full reclamation. 4 $5,500 <br />2 After removing all portable facilities, partially 3 $2,204 <br /> backfill pit to 2' above the equilibrium water level <br /> using excess overburden in the temporary stock- <br /> pile located in the pit area itself from stripping the <br /> Phase 2 area. 2449 cY @ $0.90 per cy <br />3 Import remaining backfill (77,000 cy) - 2449 cy = 20 $298,204 <br /> 74551 cy. Cost of $4.00 per cy includes spreading <br /> in pit. <br />4 Remove concrete bridge supports and use 980 3 $2,800 <br /> Loader to remove 2 bridge sections. Smooth out <br /> gravel berms and support areas. <br />5 Create shelf wetland surface on north side of lake 2 $968 <br /> (0.40 acres) Doze 3' of existing fill (1936 cy) @ <br /> $0.50 per cy. <br />6 Rip 3.6 acres to depth of 2.0 feet prior to topsoil- 2 $900 <br /> ing. Cost = $250/acre <br />North Fork Pit March 04 29 <br />£d Wd8z:Z0 6002 8Z 'unf 96SS9b££0£ 'ON Xki~ I~10If13~-0~21~J : W02l~ <br />