2002-07-05_REVISION - M1979058 - Laserfiche WebLink

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DRAFT FUNK GRAVEL PIT Permit No. M-79-058 (Funk & Hooker Pit) Phased Mining Plan Phase 1 Routt County is proposing to expand the current Funk Gravel Pit. The permit is to be converted from a Limited Impact Operations Permit 110 to the Regular Operations Penrtit 112. The total area encompassed by this permit will be 47.6 acres. This includes the currently permitted azea of 9.9 acres. The existing pit will act as the operational area, the floor of which has an area of about two acres. The topsoil for reclaiming this area is stockpiled to the north. Therefore, there will be no further reclamation of this azea until the final phase of reclamation. The crushers, support equipment, sanitazy facilities, and employee vehicles will be in this area. A dust suppressant will be applied to the access road and the operational area. Any dust generated by the crushing will be suppressed via water spray bars on the conveyor belts. The mining will begin from the existing gravel pit floor and advance to the east. To allow for drainage and still develop the most gravel, the slope of the pit floor will be set at about a 1% grade, draining to the west. The side slopes of the north and south faces will be cut to 2 :1 (2 horizontal : 1 vertical) slopes. i.e. a 27% baekslope, which is flatter than the natural angle of repose for the gravel bed. The bottom of the pit will be about 200 feet in width. The mining will advance to the east for about 650 feet from the elevation of the existing pit azea. The easterly slope will initially cut to a 2:1 slope to get the most gravel available. This will then be flattened out (by using overburden material) at a 4:1 slope (4 horizontal : 1 vertical), representing final reclamation slope. The stripping of topsoil, overburden, and exposure of the gravel will be. done initially by scrapers. Afterwards, materials will be moved via bulldozers and front-end loaders. Generally, the processed material stockpiles will follow the advancement of the radial stackers. Crushing operations will not be done annually, but on an as-needed basis. i.e., When the crusher is set up, from 40,000 to 60,000 cubic yards of material is expected to be crushed. The material will be stockpiled and hauled out at an estimated rate of 20,000 to 35,000 cubic yards for first year. After that, the depletion rate will be about 10,000 to 15,000 cubic yards per year. Near the depletion of the stockpile, the crusher operation will again be set up. It is estimated that 162,000 cubic yazds of gravel will be removed from Phase 1. The time frame is estimated to be 10 years. The total mined area (all 3 phases) is estimated to be ]5.29 acres. With an estimated average thickness of 8 inches, the-generated topsoil material will be about 16,445 cubic yards. This will be stockpiled to the east in a trapezoidal azea of 70,000 sq.ft. and a depth of 6 ft. Overburden