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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 documentation, <br />for determination of a reclamation performance bond for lands disturbed at Seneca's Seneca 11-W Mine. <br />This document will provide information regarding all disturbed lands within the proposed permit <br />boundary. The amount of bond required was developed assuming that the bond would be forfeited at a <br />time when reclamation liabilities are highest within the five-year permit term (2001-20051. This <br />condition is most likely to occur at the stage in the mining sequence when the area from which topsoil <br />has been removed is largest and the volume of material to backfill the open pit areas is greatest. This <br />usually occurs when the pit lengths are the longest and the overburden is the thickest. <br />It was determined from the Operations Plan discussion and Map (submitted in PR-04) that the highest <br />liability, or worst-case condition, would occur in the year 2005. With the submittal of PR-05, the year <br />(timeframel consisting of the worst case condition does not change. However, the amount of open pit <br />• does reduce significantly. During the 1" quarter of 2005, approximately 3,100 feet of open pit <br />(scheduled for backfilling in 20051 have already been completely backfilled leaving only about 3,600 <br />feet to be completed. The amount of open pit is being reduced on a daily basis with four dozers <br />dedicated to the reclamation on a continual basis. Based on the Operations Plan and the Backfilling and <br />Grading Plan the amount of reclamation liability will significantly decrease annually until completed. <br />Details of topsoil replacement and timing (including topsoil volume) are shown in Tab 22. This <br />determination was based on pit length, pit location, amount of box cut spoil, and disturbance ahead and <br />behind mining. The Cost Summary Formisl are attached at the end of this tab. <br />"Worst Case" Year Disturbance <br />Included in this category are the four spoil piles, open pit, areas ahead of mining that have been stripped <br />of topsoil, ramps, and miscellaneous disturbance areas in and around the open p~f. Estimated costs to <br />reclaim the disturbed area come under the headings of: <br />al Drill and shoot highwall <br />b) Doze highwall material <br />cl Doze adjacent two spoils <br />• d) <br />l Daze back two spoils <br />Grade alt ram <br />s (included in s <br />oil <br />radin <br />) <br />e g <br />p <br />p <br />g <br />fl Topsoil replacement <br />gl Revegetation <br />PR-05 i Revised 05/05 <br />