Unless otherwise approved by the Administrative Authority, the minimum cover of substructures shall be as follows:
(A) Streets and alleys. 36 inches below the established flow line of the nearest gutter, or if a flow line is not established, then the depth shall be at a minimum of 48 inches below the surface of the nearest outermost edge of the traveled portion of the street, or, designed elevations, approved by the Administrative Authority;
(B) Parkways. 36 inches below established parkway elevation;
(C) Other public places. Twelve inches below the surface. Unless the law otherwise provides, nothing in this chapter shall impose a duty upon the permittee to maintain these minimum depth requirements upon subsequent changes of elevation in the surface unless the depth of the substructure interferes with the maintenance of, or travel on, a public street.
('61 Code, § 18.20) (Ord. 702, passed - - )