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<br />Phase I-A Structure Removal <br />Estimated Cost: $75,000 <br />Phase I-B - Portal Sealing <br />All portals must be permanently sealed under the approved reclamation plan. <br />The proposed structures are similar to those approved for the Rienau No. 2 <br />Mine and consist of a concrete block wall followed by 20 feet of packing <br />material (fly ash/cement mixture) and a 3 foot thick outer concrete plug. <br />Phase I-B Portal Sealing <br />Estimated Cost: $105,000 <br />Phase I Total: $180,000 <br />Phase II - Backfilling and Grading <br />The previously approved reclamtion plan requires the re-establishment of <br />2.5:1 slopes with some localized areas as steep as 2: 1. This is proposed <br />• to be accomplished with a dozer pushing the fill material from the <br />drainage uphill into the cut areas, A total of 26,000 cubic yards (page <br />Al-4, Volume VII) of material will be required (see Exhibit M-1 Volume VII <br />for cross-sections and sheet 2 of Exhibit C-8 Volume II for key to cross- <br />section locations). The conditions are roughly analogous to those encountered <br />at Rienau No. 2 and the cost estimate of $1.57 per cubic yard of material was <br />used in this cost calculation. <br />Phase II Backfilling b Grading <br />Estimated Cost: 26,000 yds.3 x <br />1.57/yd,3 = $40,820 <br />Phase III - Topsoil Redistribution <br />Topsoil was salvaged from the mine construction area and must be redistributed <br />to a minimum depth of 12 inches. The total disturbed area requiring topsoil <br />is 12.6 acres resulting in a topsoil volume of 20,328 cubic yards. The <br />estimated cost of material movement and placement was S5.00 per cubic yard. <br />Phase III Topsoil Pedistribution <br />Estimated Cost: $101,640 <br />Phase IV - Revegetation <br />The cost of all components of revegetation from soil testing through final <br />fencing is estimated at $1,500 per acre. This estimate is slightly less than <br />that for Rienau *:o. 2 because of a greater proportion of relatively flat areas <br />resulting in slightly lower labor costs for hand seeding and mulching. <br />Phase IV Revegetation <br />~ ~ Estimated Cost: $18,900 <br />6 <br />