(A) Centerline monument shall be placed at the following locations:
(1) All points of intersection with the centerline of other streets or alleys;
(2) All points of beginning and end of curves, or at the points of intersection of tangents or semi-tangents of curves;
(3) All points of intersection with the subdivision boundary except where the subdivision boundary is a street sideline. In cases where a street terminates at the subdivision boundary and is planned for future extension, the terminal centerline monu-ment shall be set on an offset no less than three feet and no greater, than five feet along the centerline inside the subdivision boundary;
(4) All angle points.
(B) All monuments shall be tagged or marked with the registration or license number of the engineer or surveyor who signed the map.
(C) Each centerline monument shall be not less durable than:
(1) A six-inch monument spike, marked washer and tin in A.C.;
(2) A lead, brass tack and tag in concrete or cement concrete;
(3) An iron pipe of a two-inch outside diameter, not less than 30 inches in length, with concrete plug and tag no less than six inches deep in unimproved, gravelled or oiled surface. If the tag is not secured by the concrete, a brass tack shall secure the tag.
(D) Any substitute monument shall be approved in writing by the City Engineer before setting.
(E) Centerline ties.
(1) If the intersection is improved with con-crete curbs, set four L. & T.'s (using brass tacks) as tangent ties on curbs.
(2) If the intersection is not improved with concrete curbs, set four tangent ties, no less than four feet from the centerline monument.
(a) If the ties fall on the pavement, they shall be set approximately two feet from the edge of pavement.
1. If in A.C., use 6" monument spikes and tins.
2. If in concrete, use brass tacks set in lead.
(b) If the ties must be set off of the pavement, use iron pipes of a 2" outside diameter, 30" in length, with concrete plugs and brass tacks, set in natural ground no closer than two feet from the edge of pavement, and no less than six inches deep.
(3) Any substitute centerline tie should be approved in writing by the City Engineer before setting.
(4) If it is impractical to set tangent ties, the City Engineer may approve, in writing, deviation from tangent ties.
(5) Notes showing centerline ties are to be filed in the office of the City Engineer after inspection.