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" . ( , SWDP 1150-2-1 26 Kay 78 d. In addition to other requirements set forth in this pamphlet, permits may be required under Sections 10 and 404 for work within the noodway.. These permits require a minimum of 90 days to process. The Operations Division in the appropriate Corps of Engineers district should be asked to make determinations on the need for these permits in the early planning stages to prevent delays. 4. CRITERIA FOR PRESSUIU: PIPELINE CROSSING ExISTING LEVEES. a. No excavation will be performed on the levee. Place the pipe- line on the levee slopes and provide a minimum of 2 feet of cover. Place the fill uniformly on the slopes and top of the levee to slope aw~y from the pipe and parallel to the longitudinal axis of the levee. The slope of the fill shall be between 1 on 10 and 1 on 15. RelllOve all existing vegetation before fill is placed. b. Where the pipeline crosses a discharge channel, place the pipe- line on piers (the piers must not obstruct flow in the channel) or place it under the discharge channel and encase it with concrete. Extend the encasement a minimum of 5 feet into the channel side slopes. c. Any maintenance and operation roads disturbed during construc- <- tion will be repaired or replaced to a condition equal to or better than their condition before construction. d. All valves located within 15 feet either side of the toe of the levee shall be in a concrete box enclosure with a manhole-type cover. If the valve is placed in the top of the levee, the bottom of the excavation shall not be lower than 1 foot above the design water surface elevation, Place fill to uniformly slope away from the top of the valve box. e. within Fasten Provide watertight sealed manhole covers for all manholes the floodway having tops below design water surface elevation. manhole covers to the manhole structures. f. Where a pipeline parallels the levee on the channel side of the levee, the excavation will be a minimum distance of 15 feet from the toe of the levee. Where the pipeline parallels the channel, the excavation will be a minimum distance of 15 feet from the top of the channel bank. 8, Where the pipeline is on the landside of and running parallel to the levee, the pipeline shall be a minimum distance of 15 feet from the toe of the levee. Retain existing sumps, ditches, and swales, Finish grading and returfing are required. 2 '-.