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6.4.5. Exhibit E - Reclamation Plan <br /> (a) Description of the Type of Reclamation <br /> The site will be reclaimed to allow land uses including developed water resource, <br /> residential and agricultural. Each mining cell will be backfilled with the volume of <br /> overburden removed from that cell. Backfilling will occur concurrently with the <br /> mining of each cell as overburden is removed from successive cuts after the <br /> initial 2-3 acre excavation is mined out. The remaining mining cell excavations <br /> will be reclaimed to Water Storage Reservoirs (WSR) identified as Ponds 1-5. <br /> Reclamation of each mining cell WSR will include construction of a compacted <br /> clay embankment (Clay Liner) around the perimeter of the excavation to prevent <br /> seepage of groundwater into and stored water out of the WSR's. <br /> Earthwork quantities have been determined by utilizing Autodesk Civil 3D 2020 <br /> to model existing (stratigraphy), mining and final grading surfaces which are <br /> compared in various ways to yield accurate earthwork volumes. A summary table <br /> of reclamation earthwork volumes, areas and lengths is given as Table 6.4.5-1 <br /> Reclamation Earthwork Quantities Summary. The earthwork resulting in the <br /> grading plan given in Exhibit F Sheet 1, is balanced in terms of onsite materials <br /> and no outside fill is required to complete this grading. <br /> The concrete piers used to support the conveyors will be removed and buried in <br /> the backfill areas as follows: <br /> For the East Conveyor, piers on the east side of the river adjacent to Cell 1 will <br /> be buried in the backfill area of Cell 1. Piers on the west side of the river will be <br /> buried in the backfill area of Cell 2. For the north conveyor, piers on the north <br /> side of the river adjacent to Cell 5 will be buried in the backfill area of Cell 5. <br /> Piers on the south side of the river will be buried in the backfill area of Cell 6. <br /> Flood Protection Spillways <br /> Flood protection spillways have been designed as described in Exhibit G Water <br /> Information. The spillways shall be constructed immediately following the <br /> completion of mining any given mining cell. Plan and profile drawings for each <br /> spillway are given in Exhibit F Sheets 4-11. Quantities for the specified spillway <br /> slope revetments are given in Table 6.4.5-2. Spillway Slope Revetment <br /> Quantities Summary Table. <br /> Reclamation Earthwork/WSR Construction <br /> Completion of the backfilling of each mining cell will be coincident with the <br /> completion of the mining of that cell. Application of 8" of topsoil and revegetation <br /> will then begin for the backfill area of each mining cell within 1 year of the <br /> completion of that mining cell. <br /> Water Storage Reservoirs / Compacted Clay Liner Specification <br /> The borrow material proposed for construction of the Compacted Clay Liner <br /> (CCL) is the weathered claystone horizon of bedrock, which occurs under the <br /> gravel seam. The weathered zone of claystone occurs at a thickness of 2-3 ft. <br /> Geotechnical investigations conducted for nearby gravel pits indicate that the <br /> weathered claystone is a suitable borrow material with plasticity indices near or <br /> Amen Aggregate Resource <br /> Specific Exhibits <br /> Page 11 of 84 <br />