(A) All subdivision boundary corners and the intersections of street centerlines shall be marked with permanent monuments. A permanent monument shall be deemed to be concrete with a minimum dimension of 4 inches, extended 3 feet below the finished grade of the ground. Should conditions prohibit the placing of permanent monuments on line, offset marking will be permitted; provided, however, that offset courses and distances are shown on the final plat. A permanent bench mark shall be placed within the subdivision at a point accessible to the public. The elevation of this bench mark shall be referred to a U.S.G.S. datum and the elevation shall be accurately noted on the final plat.
(B) In addition to permanent monuments as required by division (A) above, other monuments of a type and design approved by the City Engineer shall be located and installed at the points as may be required by the City Engineer.
(1981 Code, § 25-147)