X. - SURVEY MARKERS

Prior to the approval of the final plat, the following survey reference markers shall be installed.

A.

Permanent concrete monuments: Permanent concrete markers four (4) inches in diameter or square, three (3) feet long, shall be placed at not less than two (2) corners of the subdivision, provided that additional monuments shall be placed where necessary so that no point within the subdivision lies more than 500 feet from a monument. Two or more of the required monuments shall be designated as control corners. The top of each monument shall have an indented cross, metal pin, or metal plate to identify properly the location of the point. All monuments shall be shown on the final plat.

B.

Markers: All lot corners, all points where street lines intersect the exterior boundaries of the subdivision, all angle points and points of curve in each street shall be marked with galvanized iron pipe not less than three-fourths (¾) inches in diameter and 30 inches long, or solid iron rods of five-eighths ( 5/8 ) inches diameter and 30 inches long, driven so as to be within one (1) inch of finished grade.

C.

Accuracy: The allowable angular error of closure and the linear error of closure for surveys, within the city, and within one (1) mile thereof, shall be as follows:

1.

Angular error of closure within the city limits shall not exceed twenty-five (25) seconds times the square root of the number of angles turned.

2.

Linear error of closure both within and outside of the city limits shall not exceed one (1) foot per ten thousand (10,000) feet of perimeter of the lot of land (1:10,000).

3.

Angular error of closure beyond the city limits shall not exceed thirty (30) seconds times the square root of the number of angles turned.