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2. Stabilizing graded material to promote a reduction in the rate and volume of <br /> runoff; <br /> 3. Retaining sediment within disturbed areas; <br /> 4. Diverting runoff away from disturbed areas including stockpiles, backslopes, and <br /> material storage; <br /> 5. Diverting runoff through disturbed areas using stabilized earth channels, <br /> culverts or pipes so as to prevent, to the extent possible, additional <br /> contributions of sediment to streamflow or to runoff outside the permit area; <br /> 6. Using straw dikes, silt fences, small V-ditches, riprap, mulches, check dams, <br /> vegetative sediment filters, temporary cover crops, sediment traps, and other <br /> measures that will reduce overland flow velocity, reduce runoff volume, or trap <br /> sediment; <br /> 7. Treating traffic areas with water or dust suppressant to reduce the potential <br /> for wind and water erosion. <br /> In addition, Peabody may utilize appropriate sediment control measures representing the <br /> best technology currently available which may include, but not be limited to the <br /> following: <br /> 1. A sedimentation pond or a series of sedimentation ponds; <br /> 2. Soil surface mechanical manipulation measures that include contour furrowing, <br /> chiesel plowing, etc.; <br /> 3. Topographic manipulations that include recontouring or reshaping of graded <br /> material in a manner that minimizes the potential for soil erosion; <br /> 4. Surface protection measures that include surface stabilizers such as temporary <br /> cover crop, permanent vegetation covers, or geotextile fabrics, etc.; <br /> 5. Linear detention and filtering structures that include filter fence, straw bale <br /> barrier, brush barrier, and filter berms; <br /> 6. Measures used in conjunction with overland conveyances including check dams, <br /> sediment traps, and water level spreaders; <br /> 7. Vegetative filters, temporary cover crops, reestablished permanent vegetation <br /> covers, etc. <br /> Siltation structures or sedimentation ponds will be utilized for all major disturbed <br /> areas, except those permit areas exempted by regulation. The remaining alternative <br /> sediment control methods may be used in conjunction with the siltation structures or, in <br /> the case of the permitted areas which are exempt (e.g., 4.05.2(3) and (4)), they may be <br /> utilized individually. <br /> 13-2 Revised 04/11/88 <br />