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• Culvert 7 and extend to an area above Culvert 10. These areas had been pre- <br />viously studied by Thompson in 1977 prior to road construction; and, where <br />feasible, Sun Coal Company avoided them and, where possible, stabilized the <br />material. <br />In 1983, Sun Coal Company submitted a mine and haul road reclamation plan. <br />The landowner requested the road be left "as-is" in order to support future land <br />uses. In response to the landowner's request, CI~LRD approved Sun Coal's sub- <br />mitted road decommission plan (Technical Revision 02). The approved plan <br />included culverts and water bars with the design capability to convey the peak <br />flow from the 100-year storm event, had to be located to disperse water from the <br />road surface, and designed with an appropriate combination of ditches and traps. <br />All structures were installed in order to minimize offsite erosion and sedimen- <br />• tation impacts while minimizing impacts to the existing hydrologic balance. <br />In 1983, Fox Consultants (Appendix 2.05.3-1) and EnecoTech (Appendix <br />2.05.3-21 conducted extensive surveys to ensure reclamation obligations were <br />met. During this decommissioned construction phase, the following construction <br />activities were undertaken. The road surface was graded, and appropriately <br />spaced water bars were constructed to permit water to drain to the outslopes. <br />As appropriate, riprapped runouts were constructed through the berms. Where <br />runouts were constructed through the berms, riprap was placed to minimize off- <br />site erosion. In addition, enlarged sediment traps were constructed at each <br />culvert outlet; and all rills and gullies within the permit area were repaired <br />and revegetated. After the road was decommissioned in accordance with the <br />approved plan, Sun Coal Company committed to monitoring structure performance as <br />• outlined in Section 2.05.6. <br />- 173 - (Rev. 5/86) <br />