§ 97.55  MINIMUM DEPTH.
   It shall be unlawful for any person to install, cause, or permit to be installed, any service pipe or main pipe, conduit, or duct, tunnel, or other structure, except manholes, culverts, and catch basins, in any public street, alley, sidewalk, or other public place, at a depth which would not allow a minimum of four feet of fill below the finish grade above the line.
(‘68 Code, § 32-61) (Ord. 1055, passed 7-3-61)  Penalty, see § 10.99