All excavations shall be properly backfilled, and the backfill shall be tamped as it is replaced and must be left level with the present grade of the street or alley. During the time that the ditch or excavation is open, it shall be the responsibility of the person to whom the permit is issued to see that sufficient burning flares are placed at the opening while the excavation is open, during the hours of from twilight to dawn and shall place blockades at the ditch or excavation, to block traffic during the entire period that said excavation shall remain open and see that safety precautions are taken at all times to protect the public and traffic.
(Prior Code, § 6.05.02) (Ord. 478, passed - -; Ord. 731, passed - -) Penalty, see § 114.99