Sanitary sewer service connections may be constructed under paved portions of a public roadway by one of the following methods, other than open trenching:
(a) By short tunnel construction of sufficient size, height and width to permit the installation of the connection pipe, to permit proper bracing of the tunnel and to permit ample room for prosecution of the work and safety of the workmen.
(b) By jacking of continuous large diameter steel casing (thirty-six inch minimum diameter) and hand excavation and mucking.
(c) By auger boring and continuous jacking of small diameter steel casing (twelve-inch minimum diameter).
(d) By auger boring without casing (twelve inch minimum diameter) and subsequent service connection insertion by use of wooden skid plates.
Regardless of which method is employed, other than open cut, backfill shall be accomplished by the flushing with water of fine sand into the void around the service connection pipe, between the connection pipe outer wall and the tunnel, casing or boring hole wall. The work of jointing and inserting the service connection pipe and the flushed sand backfill operation shall be done only in the presence of the Commissioner of Buildings or his duly appointed deputy.
(Ord. 1966-135. Passed 9-12-66.)
(Ord. 1966-135. Passed 9-12-66.)