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small slope area between the north sideslope liner berm and the relocated Segment 1 <br />access/maintenance road. A 30 -inch diameter smooth wall HDPE pipe is used for the <br />south letdown. This letdown pipe on the southeast corner of Segment 1 will remove <br />stormwater from the top surface of Segment 1, and from about 2.5 acres of the top <br />surface of the infill. This pipe will permanently drain these areas. The bottom <br />structures at the terminus of the northern letdown will be used for an additional future <br />letdown pipe which conveys stormwater from the south sideslopes of the infill. <br />Operational Procedure for Relocating Sideslope Liner Diversion Das <br />As filling progresses, the SWDD will relocate the diversion dams at 10 -foot vertical <br />intervals. The horizontal displacement will be 30 to 40 feet. Removal of the diversion <br />dam traffic barriers will require a crane. The crane should have at least a 40- to 50 -foot <br />reach and a minimum lifting capacity of 10,000 pounds. The weight of each traffic <br />barrier is approximately 5,000 pounds. <br />Relocation of traffic barriers should be scheduled for drier periods of the year (October <br />through June) if possible. If barriers must be relocated during the wet season, only one <br />side of the diversion dam (north or south half) should be relocated at a time. If <br />inclement weather is expected, only the width of barriers which can be relocated in one <br />day should be removed. Removal of barriers should be from the middle portion of the <br />existing line of barriers toward the sideslope anchor berm. Replacement should be <br />from the sideslope anchor toward the center portion of the sideslope liner. This <br />procedure will ensure that barriers on the lower terrace are in place adjacent to the pipe <br />penetrations, providing at least a partial diversion channel. The lower pipe penetration <br />must be properly removed from service and the pipe end cap secured with stainless <br />steel bands when the next upper diversion dam is ready for operation. <br />vpOSI <br />F-28 <br />ctly:a o. rte: -.r. .,IA ?_rjr . lr:74e� <br />