2014-11-25_REVISION - M1979191 (21)

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REECE, k env 2 5 2014 4e DJVISION OF RECLAMATION 5. Exhibit E - Reclamation Plan MININGANDSAFETY 5.1 Post - Mining Land Use �� G The anticipated reclamation activities include below grade reservoir creation and residential housing development. Areas anticipated to be completed as a below grade reservoirs include Phases 1, 3, and 4 within the Ditullio Property, and the entire mined out portion of the Veldman Property. Areas anticipated to be completed as residential development include a portion of Phase 4 and the entire Phase 5 within the Ditullio Property. The total area allocated for below grade reservoirs is approximately 92 acres within the Ditullio Property with water at or near the normal high water line (NHWL). The total area allocated for below grade reservoirs is approximately 77 acres within the Veldman Property with water at or near the NHWL. The PefW 1, 3-,��sSlope liners in the Ditullio propg1V are designed to meet SEO seepage requirements. The slope liners extend to the top of the pit highwall, which results in the construction of slope liner above the high waterline. This is done to minimize groundwater seepage into the pit. A minimum freeboard of 2 feet has been assumed. The'DSlope liners in the Ditullio property isare designed with 10 -foot wide crest sloping 2% toward the reservoir. The crest transitions into a 3:1 (H:V) slope extending to bedrock, which meets SEO stable slope requirements. Stability and seepage analyses indicate this slope configuration and crest width will be stable under existing site conditions. Overburden obtained from the stripping on Ditullio property soil appears to meet project specifications for slope liner embankment fill. This overburden will be utilized as a borrow source during slope liner construction. Material meeting project specifications will need to be imported from the Veldman Property. A cutoff key is designed at the base of the liner, offset approximately 5 feet from the prepared mine highwall. The cutoff will extend five feet into the claystone bedrock extending to 7 feet in sandstone bedrock as directed by GEI during construction. The key will be approximately 12 feet wide at the base. Approximately 1 foot of weathered bedrock should be stripped from within the slope liner footprint. Material excavated during foundation preparation including contaminated pit run and bedrock should be placed within the footprints of the ponds or placed within the Phase 4 or 5 backfill areas. This material should not be utilized as roadway fill.