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<br /> <br />collected in the pond during the early years of CYMC's operations. It was only after the <br />construction of the road around the east side of the south waste pile, and the resulting <br />mobilization of fines trapped in that pile, that significant quantities of sedunent collected. Based <br />on this experience, once the waste piles have had a chance to stabilize subsequent to any <br />operations, sediment buildup in the pond should go almost to zero. <br />(f1 Reclamation Costs: Reclamation activities anticipated include backfilling smaller <br />quarry entries, fencing of larger quarry entries, sedimentation control structure cleanout, and <br />revegetation of approximately 1/3 acre of surface area. The table below presents a cost estimate <br />of such work based on the assumption that an independent wntractor is hired to complete the <br />work. <br />Item Estimated Cost <br />Backfill Portals & Drainage Pipe (1) $ 6,000 <br />Sediment Pond cleanout (2) 2,560 <br />Entry Fencing (3) 3,000 <br />Sub-soil Preparation (4) 640 <br />Topsoil Hauling (5) 6,750 <br />Topsoil Spreading (6) 640 <br />Grass Seeding & Mulching (7) 350 <br />Tree and Shrub Planting (8) 1,650 <br />Remove Temporary Fencing, Cables, & Curtains (9) 2,560 <br />Trail Improvements (] 0) 1.920 <br />Total Estimated Reclamation Cost $26.070 <br />(1) Assume iwo portals, each 16 feet by 16 feet Assume 500 yards of waste rock for each (600 feet of lineal fill in <br />the adits), for a total of 1200 yards. A large loader will full the adits at the portals, followed by a large backhow to <br />add material above the portals and compact the waste to a height of approximately 6 feet above the top of the portal. <br />Assume sixteen hours of earthwork using a large wheel loader at a rate of;200 per hour including labor, <br />consumables, and mobilization ($3,200). An additional 4 hours with a large backhce at $200 per hour will also be <br />required (3800). Waste material is readily available from existing waste piles close to entries. Large waste blacks <br />will be placed, then voids filled with smaller waste rock and fines. A 4 inch drainage pipe will be placed in the <br />lowest portal before backfilling to allow drainage from the quarry down tot the sediment conhol structure, a distance <br />of about 300 feet. A screened sump inside the quarry will collect water. The cost of the sump, pipe, and <br />installation is estimated at 32,000. <br />(2) Assume two days of work for a backhoe at 380 per hour to perform initial cleanout, then a return trip after iwo <br />years for a final cleanout <br />(3) Assume five foot steel or iron fencing with pickets placed on spacing of 4 inches and pointed tops designed to <br />discourage climbers, similar to that placed by the Inactive Mine Program (IMP) in the mid-1980s. Fencing should be <br />placed so that at no time may the public be subject to rack falls from above the quarry entries. The total length of <br />fencing is estimated at 100 feet as much of the fencing placed by IMP is still in place and effective. The cost is <br />estimated at 330 per lineal foot including installation labor and mobilization for a total of 33,000. This estimate is <br />z7 <br />