Prior to the approval of the final plat, permanent reference points shall have been placed in accordance with the following requirements.
(A) Subdivision corner tie. At least one corner of the subdivision shall be designated by course and distance (tie) from a readily discernible reference marker. If a corner is within 2,000 feet of a United States Coast and Geodetic Station or state grid system, 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 and to an accuracy of 1:5,000. Where such 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.
(B) Monuments. Within each block of a subdivision, at least two monuments designed as control corners shall be installed. The surveyor shall employ additional monuments when necessary. 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 imbedded 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 and the word “Monument” or “Control Corner.” A monument shall be set at least 30 inches in the ground with at least six inches exposed above the ground unless this requirement is impractical because of vehicular traffic or other factors.
(C) Property markers. A steel or wrought iron pipe or equivalent not less than three-fourths inch 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, point of intersection, property corner, point of tangency, reference point and tangent unless a monument has already been placed at these points. Additional markers shall be placed at other points of importance.
(D) Accuracy. Land surveys, except subdivision corner ties, beyond the corporate limits of any municipality, which are not subject to these regulations, shall be as follows:
(1) Angular error of closure shall not exceed 30 seconds times the square root of the number of angles turned; and
(2) Linear error of closure shall not exceed one foot per 5,000 feet of perimeter of the lot of land (1:5,000).
(E) Block tie lines. Each block shall have at least one tie line showing bearing and distance between one established point on each side of the road.
(Ord. passed 1-4-2000)