Laserfiche WebLink
<br />The coal refuse is not expected to contain material that will cause water seeping through the waste <br />to become toxic or acid in nature. For this reason, coal waste and mine development waste can be <br />disposed of together (Rule 4.09.1(12)) and certain requirements regarding coal processing waste <br />banks are not applicable. No treatment of this runoff other than for sediment is anticipated. No <br />sub-drain system will be provided to prevent the surface water or seepage from entering the <br />groundwater system. However, the embankment drainage will be monitored and appropriate <br />measures taken if the water does become toxic or acid. Monitoring will include the sampling of <br />sediment pond discharges (see Hydrology section). If the water does become acid or toxic, the <br />ponds, ditches, and disposal areas will be lined with impervious material and the drainage treated. <br />Coal waste banks already constructed will be modified as directed by the appropriate regulatory <br />agency. <br />The material will be placed and compacted in a maximum of 24-inch lifts. The material will be <br />placed so that no ponding of surface water can occur on or behind the waste bank. Runoff will be <br />picked up in the diversion ditches located along the toe of the refuse bank where it intersects the <br />original ground. As the refuse bank grows higher, the edges will be sloped back at 4(h):1(v) or <br />flatter to provide positive slope stability and minimize slope erosion. See Map 76 for the <br />reclamation schedule. <br />• Access will continue to be maintained as the sedimentation pond and ditches must be inspected <br />and cleaned periodically. <br />Once the sub-area has been declared properly reclaimed, the sedimentation ponds, temporary <br />ditches, and access road will be reclaimed and the permanent diversion ditches will be extended <br />into the natural drainage channels. The tops of the reclaimed refuse piles will have a minimum of <br />one percent slope toward the edges. The reclaimed surface slopes will prevent any ponding even if <br />some settlement should occur. The reclamation of sub-areas 1, 2, 3 and 4 is shown on Map 77. <br />Map 83 shows final cross sections of these areas. <br />More refuse storage area has been provided than is estimated to be necessary. This excess area <br />will be used if refuse volumes are greater than anticipated or the amount of coal eventually mined is <br />greater than now expected. <br />The bank and pond designs for only the first five sub-areas are presented in this application. <br />Designs for the other areas will be prepared and submitted for DMG's approval prior to the opening <br />of these areas. <br />• Permit Rev. 4 (07/2002) IV-22 <br />