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In addition, Peabody utilized sediment control measures representing the best technology currently <br />available which included the following: <br />• 1. A sedimentation pond or a series of sedimentation ponds; <br />2. Soil surface mechanical manipulation measures that included contour furrowing, chiesel <br />plowing, etc.; <br />3. Topographic manipulations that included recontouring or reshaping of graded material in <br />a manner that minimized the potential for soil erosion; <br />4. Surface protection measures that included surface stabilizers such as temporary cover <br />crop, permanent vegetation covers, or geotextile fabrics, etc.; <br />5. Measures used in conjunction with overland conveyances included check dams, sediment <br />traps, and water level spreaders; <br />6. Vegetative filters, temporary cover crops, reestablished permanent vegetation covers, etc. <br />Siltation structures or sedimentation ponds were utilized for all major disturbed areas, except those <br />permit areas exempted by regulation. The remaining alternative sediment control methods were <br />used in conjunction with the siltation sVuctures or, in the case of the permitted areas which are <br />exempt (e.g., 4.05.2(3) and (4)), they were utilized individually. <br />The diversion ditches or collection drains in the permit area are the following: <br />Temporary Ditch <br />002 Ditch <br />004 Ditch <br />005 Ditch <br />County Road Ditch <br />Permanent Ditches <br />Area 1-(1) Ditch <br />Area 1-(2) Ditch <br />Area 1-(3) Ditch <br />Area 1-(4) Ditch <br />• These ditches are used to transport runoff into sedimentation ponds for treatment in accordance <br />with the requirements of applicable regulations. Table 13-4 summarizes specifications of these <br />13-2 <br />