Subjects Urban Development

Black-and-white diagram showing streets and the Little Tacony Creek

Frankford Creek Watershed: A historical overview of the Philadelphia section

Black-and-white image shows a trolley car emerging from a building with men standing alongside

Filling Low Land: A Story of Ash-Dumping in the Wingohocking Creek Watershed

Outline Map of the County and City of Philadelphia and Vicinity (wd000516)

Outline Map of the County and City of Philadelphia and Vicinity, 1883