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TABLE 3.7-1 Reclamation Cost Calculations -Revisions <br />• CONCRETE PORTALS <br />(MR-24) <br />Special features have been incorporated in the concrete portal design to facilitate <br />reclamation. The designs are shown on Page 29 of this Table 3.7-1 and will produce <br />panels of concrete that will be skidded into the mine or placed at the toe of the highwall <br />and covered with a minimum of 4 feet of soil. Since the Division's normal <br />source of reclamation cost data makes no provision for demolition and disposal of <br />this type of a concrete structure that is designed for easy reclamation, the costs to <br />remove the structures are estimated below. <br />Certified Blaster to Shoot Portals Use $ 500 per day and two days to finish <br />Cost for blaster $1,000.00 <br />Each portal will have 220 feet of plastic pipe to be loaded with powder. <br />Each box of powder contains 100 sticks of powder that are 18 inches long. <br />There will be a total of 150 sticks of powder needed to shoot each portal <br />The total cost of powder for all three portals at $ 100 per box will be <br />Powder Cost $500.00 <br />Total demolition cost = $1,500.00 <br />Shooting the portals will not cut all of the rebar that is used to reinforce the concrete. A <br />"welder' will be needed to cut the rebar with a torch. Since the concrete will be cleaned <br />from the rebar, cutting it with a torch will be relatively easy. The welder should be able to <br />finish one portal in one day. The welder, with torches will cost about $30 per hour. <br />Welder cost for 3 days = $720.00 <br />Concrete Disposal Cost <br />Disposal cost on site $5.18 per cy <br />Total volume of concrete 130 cy <br />Total Disposal cost = $673.40 <br />Total Portal Reclamation = <br /> <br />$2,893.40 <br />Mc Vof t - Tbl 3.7-1 Task 20 Page 3 1 t - 7958 <br />