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• handled while frozen to prevent unnecessary compaction during salvage and <br />stockpiling. Additionally, since these soils are moderately deep to deep <br />(2.0 to 3.5 feet of suitable topsoil), the A horizon topsoil will be <br />salvaged and stockpiled separately from the B/C horizon topsail and marked <br />with appropriate signs. Consequently, the structure and physical <br />condition of the organically enriched A horizon will likely be better <br />preserved than if the A and B/C horizons were mixed. <br />Approximately one foot of topsoil will be replaced within the 13.7 acre <br />permanent reclamation area during 1987 (see Reclamation Plan, Exhibit <br />13-2). Replaced topsoil will be monitored as specified on pages 9-40 and <br />9-41 in the Quality Control Program of the Seneca Renewal Application. <br />Topsoil will not be replaced within the 8.2 acre temporary reclamation <br />area until 1990 and 1991. This will eliminate the requirements to <br />rehandle the replaced topsoil during mining year 1990. <br />The entire area mined, except for the third cut area, will be completely <br />• reclaimed (see Exhibit 13-2). The third cut area will be temporarily <br />reclaimed as described below. This anticipates future mining and <br />reclamation activities in 1990 and 1991 when the 7706 dragline will reach <br />this area. In the third cut area, grading will result in a Swale that <br />will drain runoff water to the ditch downslope that directs water to the <br />002 sediment pond (see Exhibit 7-7). <br />Reclamation Cost Comparison <br />The Wadge Pit North Scraper Area will be mined and reclaimed in 1987 and <br />is within the approved 5-year permit. Reclamation costs estimated in that <br />permit included this scraper area in its general calculations. <br />The current bond calculates a worst case that includes four spoil ridges <br />behind the longest pit. As was stated in that estimate, Peabody's general <br />practice is not to leave that many spoil ridges ungraded. That is in <br />evidence at the Wadge pit today because only one spoil ridge is generally <br />• existing. Generally speaking, one graded spoil ridge is equivalent to <br />approximately 491,000 cubic yards of material (Page 13-80). At worst, the <br />3 Revised 03/10/87 <br />