All surveys made in the City shall refer to one of the following benchmarks as a starting point:
(a) On the Cleveland, Cincinnati, Chicago & St. Louis Railway, at Concrete Bridge 278A, in the top of the east end of the north abutment, eight feet east of the east rail of the east track, and about two feet lower than the top of the rail, a standard disk stamped "F 12 1934." Elevation 912.495.
(b) On the Cleveland, Cincinnati, Chicago & St. Louis Railway, forty feet north of milepost CLE 130, at an interlocking signal in the northeast corner of the concrete base, eight feet west of the west rail of the west track, and about two feet lower than the top of the rail, a standard disk stamped "G 12 1934." Elevation 910.366.
(c) On the Cleveland, Cincinnati, Chicago & St. Louis Railway, thirty-two feet southwest of the southwest corner of a signal tower in the southeast corner of a crank foundation, twenty-four feet east of the east rail of the east track, and about one foot lower than the top of the rail, a standard disk stamped "H 12 1934." Elevation 908.896.
The foregoing benchmarks were established by the United States Coast and Geodetic Survey, and the elevations are based on sea level datum.