(a) Concrete markers shall be accurately set and established at the intersections of all outside boundary lines of the subdivision. They should be thirty-six inches in length and six inches in diameter, whether square or round. The center point should be accurately marked with an iron pin set in the concrete. It should be one-half inch in diameter and cast in at least one foot of the concrete marker. Where the subdivision consists of blocks of ten or more sublots, the Street Commissioner may direct the developer to have concrete markers at the corners of such blocks.
(b) Iron pin markers shall be at least five-eighths of an inch in diameter and two to three feet in length, depending on soil conditions. Where larger diameter pins are used, a center point should be marked. Iron pin markers shall be used to mark sublot corners, p.c., p.t. and p.i. points on street centerlines, street intersection points and deflection points on centerline.
Iron pins should also be set on the right-of-way lines at p.c. and p.t. points. Where streets are not to be paved, iron pins should be set eight to twelve inches below the finished grade. Where streets are to be paved, the engineer may require that iron pins be enclosed in monument boxes, such as Neenah Foundry R-1968 type 36D adjustable or equal. Monumentation of the plat should be shown on the final drawings. The County Engineer will review such drawings and direct monuments to be set so that all lines of the plat may be conveniently re-established. Monuments and markers shall be in place before final approval of the plat. Where final approval is requested before markers are set, the Street Commissioner will ask that money be escrowed to cover the cost of setting monuments.
(c) On any plat where new streets are to be established, the Street Commissioner will ask that horizontal control be established by Polaris observation and that all lines of the plat will show true bearing or angles to true bearing.
(d) To facilitate future construction of drainage systems, the Street Commissioner will ask that vertical control be established. This shall be done by running a balanced level circuit from the nearest U.S.G.S. bench mark. A true elevation shall then be designated and shown on at least three of the concrete corner markers.
(e) It is intended that in all cases these requirements will fulfill the minimums outlined in the Ohio Revised Code.
(Ord. 143.221. Passed 11-5-79.)