(a) Location. A datum plane or standard benchmark from which all elevations and grades in the City shall be computed is hereby established at a point ten feet west of, and at a right angle to, a perpendicular line running through the center of the water tower now situated in Anderson's Addition to the City, except 163 feet evenly off the east end thereof, and except that part thereof deeded to Council, being of record in Book 47 of Deeds, page 197 of the County Record. Such benchmark is identified by a post olitic limestone, four and one-half feet in length and four inches square, placed and installed with a brass plug as found from the level of the benchmark established by the State Geological Survey. Such benchmark is hereby declared and established to be 611 feet above sea level.
(b) Measurements. The measurements of all grades, levels and planes in the City for any purpose shall be computed from, relate to and be in harmony with the elevation of the datum plane or standard benchmark established in subsection (a) hereof.
(1942 Code Chap. XVII)