Laserfiche WebLink
revegetation failure rate of 10 percent was in luded for drill and broadcast seeded areas, a 50 percent failure <br />rate for shrub seeding areas, and an 85 pert nt failure rate for shrubttree planting areas. • <br />It was assumed that all reclamation would b complete up to the fourth spoil pile. It was also assumed that <br />revegetation activities would be conducted from disturbance border to disturbance border. This would <br />include areas that have only been brushed. <br />Facility Reclamation <br />The following facilities, buildings, structures, nd miscellaneous support items would have to be demolished, <br />disposed, and the area reclaimed if minin operations were to cease in the year 2005. The following <br />discusses the reclamation of these structu es. The attached worksheets and tables show the pertinent <br />volume and area calculations. <br />Structure Demolition. This estimate assum s that all structures within the Seneca II-W Mine area would <br />have to be demolished and materials dispos d. It also assumes that no salvage value be attached to any of <br />the structures. Volume determinations were made from existing maps and/or field measured. The cost per <br />cubic foot includes disposal. Most costs, xcept where noted, were based on a mixture of construction <br />materials. All material is hauled to an open it. All information regarding structure volumes and costs can be <br />found on appropriate worksheets. • <br />Powedines. Powerline demolition was bas d on information published in Means. Powerline lengths were <br />_ taken from Exhibits 12-2 and 12-3 and field surveys where needed. Total length of line that traverses the <br />permit area is 18,200 feet. An additional 1200 feet of line from the edge of the permit area to the main <br />powedine will also be removed. <br />Faciliri Areas. After the buildings are demi <br />gravel/scoria surfacing on the parking/stora <br />hauled to the pit area where it will be topsoil <br />open pit for disposal. The entire parking are; <br />of topsoil from the topsoil stockpiles will then <br />ied and disposed, the site is reclaimed. The top one foot of <br />areas will be ripped with a dozer and then picked up and <br />and seeded. Concrete foundation areas will be hauled to an <br />will be ripped to a depth of three feet. Approximately one foot <br />e hauled by scraper to the ripped parking area. <br />Miscellaneous Utilities. Underground utility <br />will be abandoned in place. <br />Sediment Ponds. Three of the sediment po <br />and 005) will remain in place as permanent <br />12-2 and 123. Embankment volumes were <br />Tab 13. The embankment material and <br />surrounding area to reestablish the <br />been included. <br />including phone lines, water lines, and powertines, <br />ids will be totally reclaimed (009, 015 and 016), while two (006 <br />ponds. Location of all impoundments can be found on Exhibits <br />Laken from existing, proposed, and typical designs as shown in • <br />iiment accumulated from the ponds would be dozed into the <br />A one-time cost for dredging sediment from the ponds has also <br />PR04 ~ 4 Revised 09/04 <br />