Permanent monuments and markers shall be placed in all subdivisions in accordance with the following requirements:
A.
General requirements. The location and installation of monuments and markers shall be planned to ensure that they will be permanent accessible and recoverable. All monumentation shall conform to recommended practices of the surveying professional as contained in the most recent edition of the Manual of Practice for Professional Land Surveyors in the Commonwealth of Pennsylvania or equivalent standard of professional practice acceptable to the Township.
B.
Placement. Intervisible monuments shall be placed sufficiently far apart to ensure accuracy control within survey procedures. Monuments shall be placed with priority consideration for permanence and accessibility.
(1)
Placement of monuments shall consider the ultimate use of the land where the monuments are to be placed, exposure to future roadway maintenance, and landscaping of the lot. To that end monuments shall be located in the following order of priority.
(a)
On a five-foot or appropriate survey line only where sidewalks are to be installed.
(b)
If no sidewalks are to be installed then the center line of the roadway shall be monumented.
(c)
Other locations along or in the right-of-way line giving due consideration to the lot owner's use of the land and the likelihood that future changes in elevation or landscape which would affect the monument's location or its intervisibility.
(2)
Monuments shall be placed in a sufficient number of locations to define the boundary of a subdivision and the location of all streets. Sufficient monuments shall be placed to locate intersections culs-de-sac and curves in horizontal street alignments. Monuments shall be intervisible.
(3)
Markers shall be placed at the corner of all lots or at such other locations as may be required to locate all lot lines.
(4)
The location of all monuments and markers shall be shown on the plat for recording with the distance between them and the curve data shown. A notation shall be included on the plat indicating whether the monuments were found or set and a description of their type size material condition and position shall be included.
(5)
Monuments shall be identified on the Pennsylvania Plane Coordinate System NAD 83 or 27, where it is feasible to do so. This requirement may be waived for minor subdivisions where the control locations are so distant that the cost of complying would be burdensome in relation to the total survey cost.
C.
Materials.
(1)
Monuments shall be of durable materials of sufficient length and cross-sectional areas to be reliably permanent and shall clearly indicate the survey point. Concrete or stone monuments with a minimum width of four inches and a minimum length of 30 inches shall be acceptable. Other materials may be accepted with the approval of the Township Engineer.
(2)
Markers shall be iron pins or pipes that are 30 inches in length or other material acceptable to the Township Engineer.
(3)
Monuments and markers shall be detectable with conventional ferrous metal or magnetic locators.
D.
Certification of installation and escrow deposit to guarantee installation. The installation and certification shall be made by a registered surveyor prior to the approval of the subdivision. In lieu of such prior installation, the applicant shall furnish a monument escrow deposit at the time of filing the final application in an amount established from time to time by resolution of the Board of Commissioners to guarantee the proper installation of the required monuments and markers. Upon installation and certification by a registered surveyor, the deposit shall be refunded to the applicant.