Sec. 8.1.9. Subdivision Monuments

  1. Permanent Markers
    1. Permanent markers shall be placed at locations of the subdivision in accordance with Sec. 8.1.9.B.
    2. Permanent markers must be made of concrete at least 3 feet long and 4 inches square or in diameter with appropriate markings on top. The location and coordinates of each of these markers shall be shown on the subdivision plat.
  2. Coordinate System
    1. Permanent markers shall be placed at one or more corners of the subdivision that are coordinated with a horizontal control monument of some United States or State agency survey system, such as the North Carolina Geodetic Survey System, where such monument is within 2,000 feet of a corner.
    2. Where the North Carolina Grid System coordinates of the monument are on file with the state, the coordinates of both the referenced corner and the monuments used shall be computed and shown in X (easting) and Y (northing) coordinates on the map.
    3. The coordinates shall be identified as based on “NAD 83” indicating North American datum of 1983, or as “NAD 27,” indicating North American datum of 1927. Where such a monument is not available, the tie shall be made to some pertinent and permanent recognizable landmark or identifiable reference point.
  3. Corner Markers
    Corner markers shall be set at the corners of all lots and shall consist of metal pipes not less than ¾ of inch in diameter and 2 feet long.
  4. Reference Mark
    1. Whenever any portion of any lot in the subdivision lies within a special flood hazard area, a reference mark in the form of an “X” indicating the elevation in relation to mean sea level to the nearest 1/10 of 1 foot shall be located on a permanent marker or structure such as a culvert, bridge, head wall or wing wall or as otherwise approved by the Engineering Services Director.
    2. The elevation and a description of the location of the reference mark shall be indicated on the subdivision plats, which contain lots in special flood hazard areas.