Substitute pre-1916 boundary in vicinity of Cheltenham and Hasbrook Avenues

Substitute pre-1906 boundary in vicinity of Cobbs Creek at Darby Creek

Split 1916 way into 2 (separate streets)

Split ways at beginning and end of pre-1916 county boundary

Split ways at beginning and end of pre-1906 creek boundary

Combine stream segments from 1905 ascertainment/1906 change

Split ways at beginning and end of pre-1927 Bow Creek boundary

Merge stream segments into one way

Add lines associated with 1906, 1916, and 1927 Philadelphia boundary changes

Remove non-existent Chester County island within Delaware County