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RECLAMATION PLAN EXHIBIT E <br />1. GENERAL RECLAMATION PLAN <br />The reclamation of each phase will occur as it is being mined. Fine rejects from the processing op- <br />erafionwill be used to backfill the 1H:1 V mining slope to a minimum reclamation slope of 3H:1 V. <br />Since extra backfill is available, many slope azeas will be reduced even further, up to 6H:1 V. The <br />mining plan describes how this will be done. In addition to these mild slopes, the two berm barriers <br />between Phases 1 and 2 and Phases 1 and 3 will be dozed so that the elevation of the berm is 1 foot <br />above the expected water equilibrium ground water level which is 4448-4449'. The berms will also <br />be slightly excavated where they meet the outside perimeter to a depth of 4446', so that the result <br />will be to form two wetland islands of approximately 40 to 60 feet width. These islands should be <br />excellent for wildlife habitat once the site is reclaimed, especially for waterfowl. The flat staging <br />area of 16.5 acres will be left for industriaUcommercial use. Exhibit F shows the fmal configuration <br />of the site. See Map C-3 cross section for details. The 2 trenches will be filled for reclamation. The <br />eastern '/z of Trench 1 will be filled while mining occurs in Phase 3. The western %z of Trench 1 and <br />all of Trench 2 will be filled at fmal reclamation. This volume is approximately 24,700 cy. The goal <br />of filling the trenches is to provide some permeability in the gravel zone and provide minimal per- <br />meability above the gravel zone to the surface. This will be done by replacing sandy fill material in <br />the zone from the bottom of the trench to the top of the expected water level. The sand compacted <br />to between 85% and 90% maximum dry density will still have enough pore space to allow ground- <br />watermovement through it. It should be noted that the trenches will never be dug to the bottom of <br />the gravel zone, so that there will remain a large volume of very permeable material below the <br />trench to maintain the historic groundwater flow. All material placed above water level will be silty <br />type overburden or fill that will be compacted using a Cat D-8 dozer to 90% of maximum dry den- <br />sity as tested by ASTM 698. Historically, a Cat D-8 size dozer compacting the fill in small lifts {8"- <br />12") is more than sufficient to attain this compaction. The compacted material will be tested using a <br />Troxler nucleaz gage in the field. Results will be submitted to the CDMG. <br />As described in the mining plan, all contaminated overburden will be permanently taken to the <br />treatment area on the FMM property where the material will be farmed in small lifts and cleaned. <br />Gilsonite Pit 9/03 26 <br />