All excavations required for the installation of a building sewer shall be open trench work unless otherwise approved by the utility. Subgrade or trench supporting pipe shall be firm earth, six-inch pad of crushed rock on solid rock, or, if unstable earth, stabilized by crushed rock pad to prevent any settlement after backfill. If any subgrade is excavated more than two inches below bottom of pipe, it shall be filled to grade with crushed rock. Bell holes shall be dug to provide ample space for caulking joints. Backfill shall be carefully tamped in and around pipe to top of pipe for proper support. No backfill shall be placed until the pipe laying has been inspected. The Superintendent of the utility shall be notified at least 24 hours in advance of the date and the time the line is to be covered.
(B) All excavations for building sewer installation shall be adequately guarded with barricades and lights so as to protect the public from hazard on streets, sidewalks, parkways, and other public property satisfactory to the city.
(Ord. 610.3, passed 3-5-62; Am. Ord. 12-1986, passed 10-9-86) Penalty, see § 50.999