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Working Area, Haul Road and Loadout Area Ditches <br />These ditches consist of the collection ditches in the working area, the ditches <br />along the haul road, and the ditches in the loading area. Details of these ditches are <br />given in Table 2, and the cross sections are portrayed on Figure 4. <br />The working area ditches collect the drainage from the entire working area, the <br />area occupied by the mine office, maintenance buildings and yards, and warehouses, <br />and direct this drainage to the working area sedimentation pond. <br />The haul ores ditches collect the drainage interceoted by the haul roads and <br />originating on the haul roads and take the drainage to road culverts for passing under the <br />haul road into natural drainages. <br />The loadout area ditches consist of a ditch to divert water from undisturbed area <br />away from the loadout area and ditches within the loadout area to collect the drainage and <br />direct it to the loadout area sedimentation pond. <br />All these ditches have been designed to contain flow from a 10-year precipitation <br />event in accordance with the Board regulations For permanent ditches draining areas less • <br />than one square mile. The working area and loadout area ditches will he maintained for <br />the duration of the mining activity, and then will be removed restoring the ground to its <br />original contour and drainage patterns. The haul road ditches will likewise be removed <br />along with the haul road restoring the ground to its original contour if there is no need for <br />the haul road following the mining activity. However, if there remains a need for the <br />haul road for other activity following the end of mining, the haul road ditches would be <br />left in place. <br />ROAD CULVERTS <br />Some 25 culverts have been installed under the roads on the mining property. <br />Nineteen of these culverts are under the haul road, four culverts are under roads in the <br />loadout area, and two culverts are under railroad tracks in the Gossard loadout loop. <br />Details of these 25 culverts are given in Tables 3 thru 6, and typical sections are shown <br />on Figure 5. <br />• <br />3 <br />