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t <br />File M-86-085 Adequacy Items - 3 - October 17, 1986 <br />4. The S.C:S. recommends that "more steeply sloping areas should be covered <br />with fiber matting to protect from erosion until the seeding is <br />established". The staff concurs with this recommendation for all areas <br />witfi slopes greater than 2H:1V (horizontal:vertical). Please respond. <br />5. Approximately how large (in acres) will the geological study area be? <br />Please describe the final configuration of this area including the <br />overall slope, benching, bench widths and wall heights, methods for <br />controlling water runoff, and any other necessary measures to stabilize <br />this area. It may be helpful to provide a representative cross-section <br />drawing showing the finial land appearance. <br />6. .Specify any ponds, streams, roads and buildings that will remain after <br />reclasation. These features must be shown on Exhibit C - the map. <br />7. The operator is reminded that, upon final reclamation, the site should <br />be left in a stable configuration consistant with the proposed future <br />land use and should not adversely affect off-site lands and water. <br />Vegetative cover should be diverse, effective, long-lasting, and at <br />least equal in extent of cover to the natural vegetation of the <br />surrounding area. Reclaiming steep rock faces is often times a very <br />difficult task without effective planning. During the life of the mine, <br />the operator is strongly encouraged to do everything he can to <br />facilitate successful reclamation once mining has ceased. The two most <br />important things he can begin ~ do now is salvage and protect all <br />available topsoil, and to plan the final rock face area in such a way <br />that it is stable and that revegetation efforts in this area can be <br />successful. Concurrent reclamation and mining should be done when and <br />where this is possible. <br />Exhibit H - Reclamation Costs <br />1. The operator has suggested that the bond costs for this site should be <br />set at 5300.00. However, the operator has not provided detailed <br />reclamation costs estimates to substantiate this estimate. The staff <br />has calculated the cost as provide below. <br />Sackfilling spoil rock and topsoil to a total depth of 1 foot over <br />act <br />12 inches =,'0.33 yd. X 7 acres X 4840 yd? <br />~ acre <br />11180 yd3 % 51.00 per yd3 = ,$11,180.00 <br />Revegetation including seeding, fertilizing <br />an mu c <br />5350.00/acre X 7 acres = <br />5 2,450.00 <br />513,630.00 <br />