(a) After any pipes, conduits, drains, or other underground structures are laid or any excavation is made in the roadway, the trenches or openings shall be properly backfilled with approved backfill material. Trench backfill shall include material placed above a plane six inches above the barrel of the pipe. The backfill material shall consist of Item 310.12, Ohio Department of Transportation Specifications granular backfill, and shall be mechanically tamped in eight-inch layers. Driving over the trench, using bucket of a backhoe, or jetting the trench shall not be considered as alternatives to mechanical tamping.
(b) All backfill material must be approved by the Municipal Engineer prior to placement. (1980 Code 95.13)