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d. All trench widths shall be wide enough to operate a mechanical compactor on <br />either side of the pipe to achieve the specified soil densities <br />8. Use appropriate mechanical equipment for excavation activities <br />E. Excavation for Jacking and Augering <br />1. Allow adequate length in jacking pits to provide room for the jacking frame, the <br />jacking head, the reaction blocks, the jacks, auger rig, and the jacking pipe <br />2. Provide sufficient pit width to allow ample working space on each side of the jacking <br />frame <br />3. Allow sufficient pit depth such that the invert of the pipe, when placed on the guide <br />frame, will be at the elevation desired for the completed line. <br />4. Tightly sheet the pit and keep it dry at all times. <br />F. Pipe Embedment <br />I . Bed pipe above and below pipe as indicated within the as specified in the construction <br />standards <br />2. Grade compacted select backfill or other specified backfill material, where allowed, to <br />provide uniform support beneath the entire length of the installed pipe <br />3. Once pipe has been completely joined and aligned in trench, carefully backfill and <br />compact material on either side of the pipe in a uniform manner <br />4. Place and compact by hand pipe embedment material to 12" above top of pipe <br />S. Select backfill material (Class "C" Bedding) <br />6. If necessary or required use granular material, Class II type material (Class "B" <br />Bedding) <br />7. Compact all material from 12" above top of pipe and below to a minimum of 95% of <br />maximum density, at -1 to +3 of optimum moisture content as determined by ASTM <br />D698 <br />G. Backfill <br />Compacted Material <br />a. Provide for full depth of trench in all areas of structural fill such as roads, <br />driveways, embankments, fills or any other structure <br />b. Where trench work uncovers utilities or other underground obstructions, <br />carefully compact around utilities and underground obstructions once pipe is <br />installed <br />c. Install all stripped topsoil in the top 6" to 12" of trench, insure that material is <br />sufficient for vegetative growth <br />d. Place in horizontal layers of uniform thickness as required to achieve the <br />specified compaction <br />e. Use equipment and methods appropriate for material being compacted that <br />doesn't damage the pipe installed <br />f. Compact all material from 12" above top of pipe to surface to a minimum of 90% <br />of maximum density, at -1 to +3 of optimum moisture content as determined by <br />ASTM D698 <br />2. Un- Compacted Material <br />a. Compaction of backfill above pipe embedment in areas other than those specified <br />is required in order to only prevent trench settlement (Cultivated fields or <br />312333 -6 <br />