This chapter shall apply to all properties designated on an Official Map.
The following Official Map(s) are hereby adopted and incorporated by reference in this chapter and, taken together, shall be the Official Map of the Township of Lower Merion:
A. 
The Official Highway Map.
B. 
The City Avenue District Official Map.
A. 
Map elements. The Official Map, as enacted and as subsequently amended, may show appropriate elements or portions of elements of the Lower Merion Township Comprehensive Plan, the Lower Merion Township Open Space and Environmental Resource Protection Plan, and any other plan or study of the Township with regard to public lands and facilities, and may include, but need not be limited to:
(1) 
Existing and proposed public streets, watercourses and public grounds, including widenings, narrowings, extensions, diminutions, openings or closing of same;
(2) 
Existing and proposed public parks, public gathering spaces, and open space reservations;
(3) 
Conservation easements;
(4) 
Public, multipurpose pathways and easements;
(5) 
Railroad and transit rights-of-way and easements;
(6) 
Flood control basins, floodways and floodplains, stormwater management areas and drainage easements; and
(7) 
Support facilities, easements and other properties held by public bodies undertaking the elements of Township plans and studies.
B. 
Identification and acquisition. For the purposes of initially identifying land on the Official Map, property records, aerial photography, photogrammetric mapping or other methods sufficient for the identification, description and publication of areas for reservation on the Official Map will be sufficient. For the acquisition of lands and easements, boundary descriptions by metes and bounds shall be made and sealed by a licensed surveyor, registered in the Commonwealth of Pennsylvania.
C. 
Additions or modifications. The Board may make additions or modifications to the Official Map or parts thereof by following the provisions included in this chapter.
D. 
Street design requirements. Unless otherwise specified on the Official Map or within other controlling ordinance provisions, all proposed public street rights-of-way and widenings of existing public street rights-of-way shall meet the design requirements specified in Chapter 135, Subdivision and Land Development, for the highway functional classification as designated by the Official Highway Map or the Lower Merion Township Comprehensive Plan.