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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 /> A summary table of reclamation earthwork volumes, areas and lengths is given <br /> as Table 6.4.5-1. <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 /> above 20. Additionally, the CCL borrow material shall also meet the following <br /> criteria; <br /> a) Percent fines (should contain at least 20% fines on a dry weight basis). <br /> b) Percentage of gravel (material retained on a No. 4 sieve should not <br /> exceed 10%). <br /> c) Stones and rocks (no rocks larger than 2 inches should be in the liner <br /> material). <br /> Construction of the CCL will begin by moisture conditioning and disking of the <br /> weathered claystone borrow material on the excavation floor. Standard Proctor <br /> laboratory analysis of the CCL borrow material at a frequency of 1 per 10,000 yd3 <br /> shall be completed prior to moisture conditioning to determine the optimum <br /> moisture content/maximum dry density. <br /> A keyway shall then be excavated around the perimeter of the excavation offset <br /> approximately 5-6ft from the toe of the excavation slope. The keyway shall be <br /> excavated to a depth and width of 4ft with 1 H;1 V side slopes as shown in Exhibit <br /> F Reclamation Plan Sheet 3 (Typical Section). <br /> Amen Aggregate Resource <br /> Specific Exhibits <br /> Page 9 of 44 <br />