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7. Treating traffic areas with water or dust suppressant to reduce the <br />potential for wind and water erosion. <br />In addition, WFC 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 series of sedimentation ponds; <br />2. Soil surface mechanical manipulation measures that include contour <br />furrowing, chisel plowing, etc. <br />3. Topographic manipulations that include recontouring or reshaping of <br />graded material in a manner that minimizes the potential for soil erosion; <br />4. Surface protection measures that include surface stabilizers such as <br />temporary cover crop, permanent vegetation covers, or geotextile fabrics, <br />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 <br />dams, sediment traps, and water level spreaders; <br />7 Vegetative filters, temporary cover crops, reestablished permanent <br />vegetation covers, etc. <br />All surface mining operations will be conducted to achieve the effluent limitations of <br />4.05.2(7) for all mixed drainage when it leaves the permit area. Sedimentation ponds or <br />impoundments will be constructed before creating new disturbances, unless approved <br />drainage diversions or other surface water control structures are installed. <br />WFC retained Arcadis U.S., Inc. to assist in the design of sediment and water control <br />facilities such as sediment ponds and ditches. A copy of the Arcadis report is attached <br />with this section as Appendix 2.05.3(4) -1. <br />Collection Ditches, Culverts and Diversion Design Parameters <br />The main collection ditches in the proposed permit area are the NHN -001 East and <br />West, The NHN -002 North and South, and the NHN -003 North and South Ditches. <br />These ditches are used to transport runoff into Sedimentation Ponds NHN -001, NHN - <br />002 and NHN -003 for treatment in accordance with the requirements of applicable <br />regulations. The location and drainage area of these ditches can be found on Figure 1 <br />of the Arcadis report. Culvert designs are presented in Appendix 2.05.3(4) -2. Culverts <br />were designed using SedCAD software. Subwatershed areas were created for each of <br />Section 2.05.3(4) Page 2 November 2011 <br />