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<br />M. Flooding or puddling with water to consolidate backfill may be done, in unpaved <br />areas only and only when approved by the ENGINEER. <br /> <br />N. Where approved, the flooding or puddling operation shall be repeated with each <br />2 feet of backfill placed. <br /> <br />O. Mechanical compaction shall be accomplished using pneumatic or gasoline- <br />powered tampers and/or flat plate vibrators, except in close proximity to the <br />utility in the first layers of the backfill where compaction is to be obtained with <br />hand-operated tamping devices. <br /> <br />3.12 BACKFILL ON SIDES OF PIPE <br /> <br />A. The backfill shall be brought up evenly on both sides of pipe for the full length of <br />the pipe. <br /> <br />B. Care shall be taken to ensure thorough compaction of the fill under the <br />haunches of the pipe. <br /> <br />3.13 BACKFILL ABOVE THE PIPE <br /> <br />A. The remainder of the trench shall be backfilled in layers not exceeding 6-inches. <br /> <br />B. Maximum dimension of a stone or rock fragment shall be 1-inch. <br /> <br />C. Backfill shall be suitably compacted by rolling, tamping, or other settlement. <br /> <br />D. When trenches are cut in pavements or areas to be paved, compaction, as <br />determined by AASHTO Specification T-99, shall be equal to 100 percent of <br />maximum density; in other areas compaction shall not be less than 95 percent <br />of maximum density. <br /> <br />E. Backfill for sidewalks, turned, or seeded area and miscellaneous areas not <br />specifically designated above shall be deposited in layers of a maximum of 10 <br />inches loose thickness, and compacted to 85 percent maximum density for <br />cohesive soils and 90 percent maximum density for cohesionless soils. <br /> <br />F. Plastic warning tape shall be placed directly over the pipes and conduits at a <br />depth of 18 inches below finished grade for the sewage force main, sewer <br />service laterals, water lines, electric lines, alarm and communications lines. <br /> <br />3.14 SLAB <br /> <br />A. Where insufficient cover, excessive loads or local jurisdiction require, a <br />protective concrete slab 6 inches thick, as indicated in the Drawings or as <br />required by local authority, whichever is of greatest depth, shall be provided. <br /> <br />City of Sunny Isles Beach <br />NE 174th Street Roadway Improvements <br />02300 - <br />12 <br />Earthwork <br />14-1758 / 09-19-2014 <br />