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S[ormweter Manaeemenl Plan 1728/97 <br />3.1 Gravel Bar Aggregate Pit <br />• The gravel bar aggregate pits are located south of Tallahassee Creek and north of the <br />Arkansas River. Initial mining activities will disturb about 16.8 acres for mining, 18.1 <br />acres for a plant area, 8 acres for permanent visual impairment berms and several acres for <br />roads, buffers and a service area. Subsequent mining will disturb an additional 37 acres in <br />future years. <br />Following removal and stockpiling of available topsoil material, the gravel will be mined <br />by a combination of tracked and rubber-tired heavy construction equipment including <br />scrapers, dozers, end-loaders and haul trucks. Mined material will be transported to the <br />plant where it will be crushed and/or screened into marketable products. A separate <br />SWMP section has been prepared for the plant area which includes material stockpiles. <br />Reclamation activities at the gravel bar aggregate pits are discussed in the project's <br />reclamation plan. <br />A buffer will remain at the north end of the gravel bar areas to be mined. There will be no <br />discharge from the pits. Temporary stabilization practices include those below. The pits <br />are <br />• <br />• <br />XX Temporary Seeding <br />_ Silt Fences <br />XX Straw Bale Dikes <br />Temporary Sediment Basins <br />_ Sediment Traps/Ponds <br />XX Stabilize Access Road <br />XX Drainage Swales/Ditches <br />_ Mulching <br />_ Erosion Control Blankets <br />Temporary Drain Diversion <br />_ Brush Barriers <br />Other Practices: <br />XX Preserve Existing Vegetative Buffers <br />Earth Dikes <br />rermanent staouization practices InGUOe: <br />XX Permanent Seeding <br />Check Dams <br />Grassed Waterways <br />XX Drainage Swales/Ditches <br />Pipe Slope Drain <br />Subsurface Drain <br />_ Drain Inlet Protection <br />Rock Outlet Protection <br />Retaining Walls <br />Sod Stabilization <br />XX Vegetative Buffer Strips <br />Erosion Control Blankets <br />XX Gravel Buffer <br />Level Spreader <br />Sediment Traps <br />Sediment Basin/Pond <br />XX Terraced/Graded Slopes <br />Other Practices: <br />XX Preserve Existing Vegetative Buffers <br />Pege 7 <br />