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.~ <br />. ~- s ~ <br />January 7, 1987 <br />Page 3 <br />be developed as a raptor nesting area. The 3:1 slope would be <br />left on an uneven, rolling hills type of configuration. Copies <br />of the SCS and DOW recommendations are attached. <br />The enclosed Map Exhibit F, dated December 15, 1987, shows the <br />sequence of final reclamation and an approximation of the final <br />contours. As stated previously, reclamation will follow the min- <br />ing through each phase. The final reclamation of all of Phase 1 <br />will be completed within five years of when the second step of <br />mining is started in the area designated as Phase 2. Final <br />reclamation of Phase 2 will be completed when all mining in <br />Phase 2 is complete. Phase 3 will then be reclaimed if <br />disturbed. The remaining overburden stockpile in Phase 4 will be <br />the last to be reclaimed. <br />There will be an interim partial in Phase 2 after the first <br />step of mining is complete. When the stopes are backfilled and <br />clay removed in the first step, the surface will be leveled to a <br />lOH:1V slope or less east of the highwall, which is also the <br />footwall of the clay seam. The footwall will have a slope <br />approximately }H:1V and range in height from less than 30 feet to <br />50 feet in height. <br />The leveled surface is expected to be rock. No further reclama- <br />tion will be done in this area at that time until the second step <br />of mining is started. In the event this leveled surface is found <br />to be unstable (i.e. dust or water erosion), or if no further <br />mining is anticipated, the surface will be topsoiled and seeded <br />as stated in the following text. <br />FINAL RECLAMATION: <br />Backfilling and Grading Surface Area <br />After the initial mining cut, the backfilling and grading will be <br />concurrent with mining. As the pit progresses along the clay <br />seams, the overburden, which is removed to expose additional <br />clay, will be backfilled into the previously mined area. This <br />will then be final graded to a slope not to exceed 3H:1V slope. <br />There will be no additional compaction, the equipment used will <br />provide sufficient compaction of the material to provide a stable <br />slope. There will be no toxic material mined or backfilled. <br />A portion of the rock footwall will be exposed after reclamation <br />is completed. After the clay has been removed, the footwall will <br />be 100-150 feet high. Historical evidence indicates that this <br />height of footwall will be stable. This footwall will have a dip <br />of approximately 55 degrees, which is a slope of approximately <br />1/2H to lV. The height of open footwall remaining after back- <br />filling will range from less than 10 feet to 80 feet; the average <br />