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embankment because they are "dugout" structures and have a capacity of less than one acre- <br />toot; <br />7. Treating traffic areas with water or dust suppressant to reduce the potential for wind and <br />water erosion. <br />8. A sedimentation pond or a series of sedimentation ponds; <br />9. Soil surface mechanical manipulation measures that include contour furrowing, chiesel <br />plowing, etc.: <br />10. Topographic manipulations that include recontouring or reshaping of graded material in a <br />manner that minimizes the potential for soil erosion; <br />11. Surface protection measures that include surface stabilizers such as temporary cover crop, <br />permanent vegetation covers, or geotextile fabrics, etc.; <br />12. Linear detention and filtering structures that include filter fence, straw bale barrier, brush <br />barrier, and filter berms; <br />13. Measures used in conjunction with overland conveyances including check dams, sediment <br />traps, and water level spreaders; <br />Siltation structures or sedimentation ponds will be utilized for all major disturbed areas, except those <br />permit areas exempted by regulation. The remaining alternative sediment control methods may be used <br />in conjunction with the siltation structures or, in the case of the permitted areas which are exempt <br />le.g., 4.05.2131 and 1411. they may be utilized individually. Small area exemptions ISAEI have been <br />approved for various stockpiles at the mine site and TAHR Isee Attachment 13-81. . <br />All surface mining operations will be conducted to achieve the effluent limitations of 4.05.216) for all <br />mixed drainage when it leaves the permit area. <br />Sedimentation ponds or impoundments will be constructed before creating new disturbances, unless <br />approved drainage diversions or other surface water control structures are installed. <br />Diversion Ditches <br />The diversion ditches or collection drains in the permit area are the following: <br />I.D. Name Location ~ Design (Tab 131 Approval Date <br />Ditch No. 4 II-W Attachment 13-2 1989 <br />Ditch No. 7 II-W Attachment 13-2 1992 <br />Ditches will ba used to transport runoff into sedimentation ponds for treatment in accordance with the <br />requirements of applicable regulations and divert surface runoff away from topsoil stockpiles and active <br />• <br />2 Revised 4/00 <br />