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• CHAPTER 25 <br />BONDING <br />Introduction <br />The purpose of this chapter is to provide a reclamation cost estimate, with supporting <br />documentation, for determination of a reclamation performance bond for lands disturbed at <br />5eneca's Seneca II-w Mine. This document will provide information regarding all disturbed <br />lands within the proposed permit boundary. The amount of bond required was developed <br />assuming that the bond would be forfeited at a time when reclamation liabilities are <br />highest within the five-year permit term (2001-2005). Thia cond is ion is most likely to <br />occur at the stage in the mining sequence when the area from which topsoil has been <br />removed is largest and the volume of material to backfill the open pit areas is greatest. <br />This usually occurs when the pit lengths are the longest and the overburden is the <br />Ch ickeat. <br />• IC was determined from the Operations Plan Map (Exhibit 12-2 and 12-3) that the highest <br />liability, or worst case, would occur in the year 2003. This determination was based on <br />pit length, pi[ location, amount of box cut spoil, and disturbance ahead of mining (see <br />appropriate worksheet in attachment 25-1). <br />The calculations, costs, and backup documentation for all disturbed lands and facilities <br />are generally located in the following attachments: <br />Attachment 25-1 Bond Cost Worksheets <br />A[CachmenC 25-2 FPC Computer Printouts <br />7003 "Worst Case" Year Disturbance <br />Included in this category are the tour spoil piles, open pic, areas ahead of mining that <br />have been stripped of topsoil, ramps, and miscellaneous disturbance areas in and around <br />the open pit. Estimated costs to reclaim the disturbed area come under the headings of: <br />a) Drill and shoot highwall <br />b) Doze highwall material <br />• c) Doze adjacent Cwo spoils <br />d) Doze back two spoils <br />1 Revised 3/01 <br />