_GENERAL DOCUMENTS - C1981017 (224)

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Page .'i placed again cut slopes at a maximum of 2: 1. This work will probably require using a large backhoe to remove the fill. On steeper and longer fill slopes, a large dragline may be required. No material should be pushed down slope. In areas with cut slope instability, a rock buttress should be used to help stabilize the reconstructed cut bank. b. Remove all road fill from the natural drainage channels, floodplains, riparian areas, and wetlands. C. Recreate the natural slope drainage where it crosses the road. One alternative is to excavate and remove the road fill until the natural ground surface is exposed. A second alternative is to construct a drainage through the road fill, stabilizing the bottom and sides of the drainage with large rock. d. Heal all the gullies eroded by con:entrated road runoff to prevent further erosion and sediment productioi. e. Remove all manmade materials from drainages and floodplains. 5. Use temporary erosion control measures to protect water quality until final reclamation is completed. a. Maintain existing sediment basins and construct and maintain new temporary sediment basins to trap sediment. b. Filter sediment using silt fences and straw bales in areas where adequate natural buffers are not present. C. Protect bare ground from eroding by seeding to an annual grass or covering with straw mulch until the permanent revegetation treatment can be completed. 6. Establish a permanent vegetative cover on all disturbed areas. The following are some basic revegetation practices. Procedures for revegetatiog the more unique sites should be developed based on site specific investigations. a. Apply topsoil on the critical sites. The current reclamation plan lists varying depths of topsoil to be distributed according to the sites aspect, but each area should be looked at on a site-by-site basis for the amount needed. b. Prepare a proper seedbed for all sites that will be revegetated. Long, steep cuts and fills will require innovative ways of seedbed preparation. However, where the soils are crusted they must be properly prepared. C. Fertilize, seed, and mulch. Use netting as required to hold mulch in place and to control soil erosion. The type of seed, seed mixture, and fertilizer will need to be prescribed by the Forest Service on a site-by-site basis. Planting tree seedlings should be considered on selected sites. d. Fertilizer treatments should include the use of organic amendments . Sewage sludge is recommended as one type soil amendment that should be used on the spoils and soils lacking adequate topsoil.