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<br />B. Backfilling over ducts shall begin not less than three days after placing concrete <br />encasement. <br /> <br />C. Backfilling shall be prosecuted expeditiously as detailed in the Drawings. <br /> <br />D. Space remaining between the pipe and sides of the trench shall be packed full <br />by hand shovel with selected earth, from stones having a diameter no greater <br />than 2-inches and thoroughly compacted by non-mechanical methods, as fast <br />as materials are placed, up to a level of one foot above the crown of pipe. <br /> <br />E. Compact to 95 percent maximum density per AASHTO T-99, in green space <br />and 100 percent maximum density beneath roadways in layers not to exceed 6- <br />inches from the pipe centerline to the top of backfill. <br /> <br />F. The filling shall be carried up evenly on both sides with at least one man <br />tamping for each man shoveling material into the trench. <br /> <br />G. The remainder of the trench above the compacted backfill, as just described <br />above, shall be filled and thoroughly compacted with common fill by rolling, <br />ramming, or puddling, as the ENGINEER may direct. <br /> <br />H. Compact common fill in 12-inch layers to 95 percent maximum density. <br /> <br />I. The bedding rock in muck areas shall consist of the at least 10-inches of <br />washed and grade limerock placed in the trench to the proposed elevation of <br />the centerline of the pipe prior to pipe laying. <br /> <br />J. This bedding shall not be used as a drain for ground water. <br /> <br />K. Take precautions necessary to maintain the bedding in a compacted state and <br />to prevent washing, erosion or loosening of this bed. <br /> <br />L. In locations where pipes pass through building walls, take the following <br />precautions to consolidate the refill up to an elevation of at least 1-foot above <br />the bottom of the pipes: <br /> <br />1. Place structural fill in these areas for a distance of not less than 3-feet either <br />side of the centerline of the pipe in level layers not exceeding 6-inches in <br />depth. <br /> <br />2. Wet each layer to the extent directed and thoroughly compact each layer <br />with a power tamper. <br />City of Sunny Isles Beach <br />NE 174th Street Roadway Improvements <br />02315 - <br />7 <br />Excavation and Fill <br />14-1758 / 09-19-2014 <br />