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Due to spoil side stripping techniques employed at Trapper, extra room is needed to effectively place spoils. <br />• Taking into consideration that the shortest cycle time in Flintlock Pit leaves the pit active for 230 days and <br />that the interburden will be cast as far as three previous cuts, it is not possible to regrade the spoils within <br />180 days after coal removal. For Trapper Mine's contemporaneous regrade criteria, grading will progress <br />such that there will be no more than three un-regraded spoil rows, including the active spoil row, at any one <br />time in each pit A pictorial view of the double pass stripping operation is shown in Figure 3.5-1. This figure <br />presents a simplification of the Trapper stripping operation and shows graphically why three spoil rows are <br />required. <br />• <br />• <br />Revision: P. tt -1o <br />3-39b <br />e/?/ Approvzd: ---