Watersheds Pennypack Creek Watershed

Map Lovers’ Monday: The Ellet Map of Philadelphia County, 1843

Sandy Run Watershed and the Holmesburg Water Works

Lower Dublin township map

Lower Dublin Township, Philadelphia County, in 1848

Pennypack Park and Creek map, Roland Williams, 2005

Pennypack Park Map

Plans and maps of the Pennypack Creek Watershed in Philadelphia

Northeast Philadelphia history, one page at a time: The Holmesburg Library Scrapbook Collection

Black-and-white photograph depicts a large brick sewer tube lying on a barren landscape

Streams, islands, and ferries of early Philadelphia

Norman Lofton inspects sewer at Ditman and Sheffield, 1987