(A) Generally. Prior to the approval of a Minor Final Plat or a Major Final Plat, permanent reference points shall have been established in accordance with the requirements set forth in this section.
(B) Subdivision corner tie. At least one corner of the subdivision shall be designated by course and distance (tie) from a readily discernable reference marker. If a corner is within 2,000 feet of a U.S. Coast and Geodetic Station or N.C. Grid System coordinated monument, or city coordinated system, if the monument or city coordinated system exists, then this corner shall be marked with a monument so designated by computed X and Y coordinates which shall appear on the map with a statement identifying this station or monument to an accuracy of 1:10,000. When such a monument or station is not available, the tie shall be made to some pertinent and readily recognizable landmark or identifiable point, physical object or structure. However, if in the opinion of the Planning Board, a subdivision is of such small size, or if there is an existing tie within a reasonable distance of the subdivision, this shall not be required.
(C) Monuments. Within each block of a subdivision at least two monuments designed and designated as control corners shall be installed. The surveyor shall employ additional monuments if required. All monuments shall be constructed of concrete and shall be at least four inches in diameter or square and not less than three feet in length. Each monument shall have embedded in its top or attached by a suitable means a metal plate of noncorrosive material and marked plainly with the point, the surveyor’s registration number, the month and year it was installed, and the word “monument” or “control corner”. A monument shall be set 30 inches in the ground unless this requirement is impractical because of unusual conditions.
(D) Property markers. A steel or wrought iron pipe or the equivalent of not less than three-quarter inches in diameter and at least 30 inches in length shall be set at all corners, except those located by monuments. A marker shall also be set at a point of curve, and point of tangency unless a monument has already been placed at the points. Additional markers shall be placed where required by the city.
(E) Accuracy. The allowable angular error of closure and the linear error of closure for surveys within the city and within one mile thereof shall be in accordance with Chapter V of the Manual of Practice for Land Surveying published by the State Board of Registration for Professional Engineers and Land Surveyors.
(Ord. passed 7-25-2011)