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1 <br />2 <br />3 <br />4 <br />5 <br />6 <br />7 <br />8 <br />9 <br />10 <br />11 <br />12 <br />13 <br />14 <br />15 <br />16 <br />17 <br />18 <br />19 <br />20 <br />21 <br />22 <br />23 <br />24 <br />25 <br />26 <br />27 <br />28 <br />Sufficient hose to the satisfaction of the Street Superintendent <br />shall be provided in order to apply the water to a trench at <br />intervals not to exceed 100' <br />Whenever sufficient water, as determined by the Streets <br />Superintendent, is available, at a minimum pressure of 40 lbs. <br />per square inch, each backfill layer may be settled using water <br />jets 1 1/4" in diameter and of sufficient length to the bottom <br />of the backfill layer in such manner as to settle the backfill <br />thoroughly. <br />The final backfilling of the trench shall be kept 1' <br />below the existing ground surface for flooding. After such <br />flooding the backfill shall be continued to the surface, except <br />where the street shall be immediately paved, in which case the <br />the flooding shall be completed about 1' below the sub -grade level <br />of the street. <br />In lieu of flooding, the Street Superintendent may <br />require the excavation to be backfilled in layers not less than <br />6" nor more than 18" in depth. Each layer will be moistened, <br />and thoroughly tamped with suitable mechanical equipment before <br />the next layer is placed thereon. <br />Backfilling excavations for special structures, man- <br />holes and footings shall be made in accordance with the provisions <br />herein for trenches above 1' above the pipe. <br />After the backfill material has been allowed to settle <br />the excavation shall be filled 1' above the adjoining surface, and <br />rolled until unyielding with a roller weighing not less than 12 <br />tons, or with the wheels of one side of a loaded truck of not <br />