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• <br />• <br />• <br />EXHIBIT L -- AMENDMENT 4 <br />Reclamation Costs <br />This Exhibit will present the estimated costs to reclaim Phase 7. These costs are <br />estimated at a point in the mining operation where the disturbance to lands would be <br />maximized. This point is when the operator is moving into Year 3 mining. The <br />dewatering trenches are dug and the Year 3 area is cleared of trees. The Year 2 area is <br />backfilled with reject sands to a depth of 13 feet, but no overburden is moved on yet. All <br />the overburden (OB) and topsoil (TS) stockpiles exist. The Year 1 area is completely <br />backfilled to a depth of 26 feet, but no grass has adequately germinated. The levee and <br />the settling basin remain. The field conveyor has been dismantled to the Year 1 — 2 line. <br />In this operation, the backfilling of the mined area is done concurrently with the mining. <br />This is a necessity because the site does not contain enough unmined areas to store <br />excessive amounts of OB. The stockpiles along the northern and eastern setbacks can <br />store up from 90,000 to 110,000 cubic yards of material. All this material will be used in <br />the reclamation of the Year 3 area. <br />Table L -1 on the following page is an overall examination of the material needed to <br />backfill the excavation to a grade at two feet above the groundwater table. Based on the <br />drill logs, the groundwater averages 13 feet below the ground surface. With a 37 feet <br />deep excavation, the backfill will average 26 feet. Thus an eleven foot deep depression <br />will be the final reclaimed land form. The sources of backfill are the OB, TS, reject <br />sands and clays, drainage channel excavation, levee, setback benching, and pumping of <br />wash out basin slurry. The Table shows that the material available for backfilling <br />exceeds the material needed by 2 %. <br />Table L -2 is the analysis of the Phase 1 basin slurry available and the cost. <br />In the event the earthwork estimate falls short of the reality of backfilling, additional <br />material is available in a large stockpile of overburden on the north side of Phase 2. <br />Table L -3 is the cost estimate to reclaim the operation at the point of maximum <br />disturbance as described above. <br />