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1 D. Dewatering System Outlet Structures: The Dewatering System Outlet structures must be carefully removed to prevent damage to horizontal drainage pipes which daylight at these points. The horizontal drains should be extended to prevent blockage to the outlet since these pipes must continue to operate after all reclamation activities have been completed. Erosion control can be provided by installing gravel or riprap at the end of these pipes and down the slope for at least fifteen to twenty feet. I All concrete which is broken and removed from each outlet structure should be taken to the designated disposal areas. t E. Spillway Channels: 1 The Spillway Channels which are shown on the Site Plan have been designed to carry emergency storm flows that may happen to exceed the capacity of the runoff ponds. These channels are lined with filter fabric, riprep and/or gabions. The riprap and gabions should be removed and used for fill in those areas of the road or spillway channel which pass through rock. The rock can also be used for local 1 erosion protection as necessary for any other needed areas of the reclaimed site. 1 The Pilter fabric should be removed and disposed in the designated on-site disposal areas. Normally, the channel should be backfilled with on site earthen materials. When the channel passes through a rock cut, however, the channel should be filled with rock; the rock should be placed to form a dense, erosion resistant mass. Smaller rock, or mortar, may be used to fill any voids. F. Water Tank and Foundations: The water storage tank should be removed and salvaged. The Youndations should be ' demolished, removed and transported to the designated on--site disposal area. The retaining wall may be removed or left in place and buried at the Owners ' option. The area should then be backfilled in uniform layers to return the area to its approximate original contours. The backfill should be placed in uniform 8" lifts compacted to approximately 85% of the maximum Standard Proctor Density. The area should then be covered with a uniform layer of topsoil, 12" to 18" in thickness, in accordance with the M6cR plan. Seeding and mulching should also conform to the M&R plan. ' G. Wastewater Plant, Water Treatment Plant and other Miscellaneous Facilities: After the superstructures oY these facilities have been removed and salvaged, the ' foundations and other unsalvageable parts should be removed and transported to the designated on-site disposal areas. The sites for the wastewater plant and the water treatment plant were relatively flat to begin with and only limited earthwork is ' anticipated in order to return these areas to their approximate original contours. These sites should be given a layer of topsoil and seeded as required in the MdcR plan. 1 1 13