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B. Initial Backfill 1. Initial backfill shall be the material placed on the bedding after pipe joints have been completed , inspected , and passed by the Engineer , and shall extend to a point six (6) inches above the top of the pipe. 2. The material shall be carefully placed in lifts not to exceed six ( 6) inches in height, brought up evenly on both sides, so as to completely fill all spaces under the haunches , and compacted to 92% , all done so as not to disturb or damage the pipe . Jetting will not be allowed. C. Top Backfill 1. Top backfill shall be the original top soil and shall be compacted to a density of not less than 90 percent. D. Backfill in Compacted Fill 1. Where trenches have been excavated in compacted fill, these trenches shall be backfilled with the fill material excavated , and recompacted, in 6 inch layers, to 95% relative density by a means other then jetting. E. Trench Backfill Compaction 1. When mechanical means are used to obtain the required compaction, Contractor must exercise extreme caution so as not to damage or disturb the pipe . This is particularly true when compacting directly over top of pipe in the placing of initial backfill. F. Other Backfill Requirements 1. Where cribbing is allowed in the trench, the fill shall be carried to a height sufficient to prevent the surrounding ground from cracking or caving into the trench before the cribbing is removed. 3 . 08 GRADING A. Grading shall be performed at such places as are indicated on the Drawings, to the lines, grades, and elevations shown and shall be made in such a manner that the requirements for formation of embankment can be followed . All unacceptable material encountered , of whatever nature within the limits of grading , shall be removed and disposed of as directed. During the process of excavation , the grade shall be maintained in such condition that it will be well drained at EARTHWORK 02200-8