2002-07-05_REVISION - M1979058 - Laserfiche WebLink

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r .r FUNK GRAVEL PIT Permit No. M-79-058 (Funk & Hooker Pit) Reclamation Plan Phase 1 It is the property owner's intention that the existing pit not be reclaimed until completion of the entire projected mining plan. The mining will advance to the east for about 650 feet from the elevation of [he existing pit floor. The final grading will be done with slopes reclaimed at a ratio of 4 :l (horizontal :vertical). The overburden piles will be used to accomplish this. During the Phase 1 Mining Plan, the only azea that will be reclaimed is the easterly slope. It will be cu[ to 2 :1 (horizontal :vertical) slopes, i.e. a 27% backslope, which is flatter than the natural angle of repose for [he gravel bed, to generate as much gravel as possible. This slope will then be filled with overburden material to bring it to a 4:1 slope. The bottom of the pit will be about 200 feet in width. It will have a 1% slope and drain to the west. Topsoil will be stockpiled to the east in a trapezoidal area of 70,000 sq.ft. and a depth of 6 fr. Overburden will be stockpiled [o the south of the topsoil, covering and area of about 175,000 sq.ft. and a depth of 8 ft. Both of these piles are to be placed to the east, so that they are out of the operating area and will only have to be moved only once, Both the topsoil and overburden stockpiles will have slopes that are flat enough [o accommodate mowing machinery. Both the topsoil and overburden stockpiles will be seeded at the end of each yearly construction disturbance to prevent erosion. However, during the first year of operation (presumably 2002) the seeding of both the topsoil and overburden stockpiles shall be delayed until the spring of 2003. Spraying against noxious weeds will be done in accordance with Routt County's overall weed spraying program. The total area of dismrbance in Phase 1 is estimated [o be about 5.6 acres. A sediment catch basin will be constructed on the slope to intercept runoff water. Phase 2 The mining will be done at 2:1 slopes. At the completion of mining of this phase, the slopes to the east and south will be set at 4:1 (horizontal: vertical) with the existing overburden. The westerly side will "daylight" to the natural drainageway. Topsoil will be taken from the reserve pile at the northeast area of the site. The mixture will be of native grasses as specified in the mix design from the Soil Conservation Service. The floor of this area will be reclaimed as the mining activity advances into Phase 3. The slope of the floor will be at about 1 % and will drain to the northwest. The total surface dismrbance in Phase 2 is estimated to be about 6.8 acres. Phase 3 This mining phase will represent the fmal stage. The mining will advance to the north and "daylight" at a 1% slope to the north. At the conclusion of this mining area, the slopes will be seeded with the designate grass mixture, and the original mining area (8.4 acres) will also be reclaimed. The estimated area of this phase is 2.8 acres. General Note: Straw bales As an amendment to the Natural Resources Conservation Service (NAGS) Reclamation Plan (dated 11 July 'O1) suggested reclamation plan, any straw bales that are used anywhere in the permitted area, shall be certified weed- free, including Jointed Goat Weed. Notes: At the completion of mining, the pit slopes on the east and south shall be set at 4:1. The floor of the pit shall be reclaimed at a 1% slope, generally falling to the west. The mining azea of Phase 3 shall be "daylighted" to the north, generally falling at a 1 % grade.