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• Structure Demolition. This estimate assumes that all structures within the Yoast Mine area <br />would have to be demolished and materials disposed. Ic also assumes that no salvage valve <br />be attached to any of the structures. Means Site work and Landscape Cost Data - 1998, was <br />used to estimate these costs. Volume determinations were made from existing maps and/or <br />Field measured. The cost per cubic foot includes disposal. Most costs, except where <br />noted, were based on a mixture of construction materials. All material is hauled to an <br />open pit. All information regarding structure volumes and costs can be found in <br />Attachment 25-1. <br />Powerlines. Powe rl ine demolition was based on information published in Means. Powerl ine <br />lengths were taken from Exhibit 12-1. Total length of line that traverses the permit area <br />is 3.0 miles. Please see [he appropriate worksheet for costs in Attachment 25-1. <br />Facility Areas. After the buildings are demolished and disposed, the site is reclaimed. <br />The top one foot of gravel/scoria surfacing on the parking/storage areas will be ripped <br />with a dozer than then picked up and hauled to the pit area where it will be topsoiled and <br />seeded. The entire parking area will be ripped to a depth of three feet. Approximately <br />• one foot of topsoil from the topsoil stockpiles will Chen be hauled by scraper to the <br />ripped parking area. <br />Miscellaneous Utilities. Underground utility reclamation, including phone lines, water <br />lines, and powe rl inea, will be abandoned in place. <br />Sediment Ponds. Four sediment pond will be in place by the end of 2004 (Ponds 010, oll, <br />012, and 0141. Location of the impoundments can be found on Exhibit 12-1. The embankment <br />volume was taken from proposed and typical designs as shown in Chapter 13. The embankment <br />material and sediment accumulated from [he ponds would be dozed into the surrounding area <br />to reestablish the drainage. Please refer to worksheet for calculations. <br /> Road Reclamation. The three types of roads requiring reclamation within the mine site are <br /> haul roads that are [o be totally reclaimed, light-use roads [hat are to be totally <br /> reclaimed, and roads that are presently haul roads but will be left for the postmine <br /> landowner and must be narrowed. There are approximately 4.7 miles of haul roads t hat will <br /> be totally reclaimed, 4.0 miles of light-use roads that will be totally reclaimed, and 4.2 <br />• miles of haul roads [h at will be downs iz ed for postmine landowner use. <br />5 Revised 11/00 <br />