Whenever any excavation for the laying of pipe is made through rock, the pipe shall be laid 6 inches above the rock bottom of the trench, and the space under, around, and 6 inches above the pipe shall be backfilled with clean river sand, noncorrosive soil, or ¼ inch minus gravel. Broken pavement, large stones, and debris shall not be used in the backfill.
(1981 Code, § 24-94) Penalty, see § 93.999