When backfilling is done by water settling, excavated materials above utility installations shall be deposited uniformly in layers of not more than 5 feet in thickness and shall be thoroughly flooded. During the flooding, the water shall be allowed to flow slowly to the trench from high points and shall be worked down to the full depth of the layer of backfill with bars. All bars used shall be long enough to extend entirely through the layer being filled and shall be forced down through the loose backfill material. As the bars are withdrawn, the water shall be allowed to flow downward around the bar. The channel or hole formed by the bar shall be kept open and the water kept running into it until the fill has settled. All work shall be done in a manner as to obtain a relative compaction through the entire depth of the backfill of not less than that existing adjacent to the excavation.
(1981 Code, § 24-92)