Whenever any excavation for the laying of pipe is made through rock, the pipe must be laid six inches above the rock bottom of the trench and the space under, around and six inches above the pipe must be backfilled with clean river sand, non- corrosive soil or one-quarter inch minus gravel. Broken pavement, large stones, and debris must not be used in the backfill. Use of frozen backfill is prohibited, in any case.
('72 Code, § 650:48) (Am. Ord. 1995-779, passed 4-24-95) Penalty, see § 10.99