The backfill sleeve 126 is approximately the same width as the trench 114 which provides for {HEAD ~ consistent filling} of {TAIL ~ the trench} 
of
The backfill sleeve 126 is approximately the same width as the trench 114 which provides for { HEAD ~ consistent filling } of { TAIL ~ the trench }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL