Watersheds Delaware River Watershed

Map Lovers’ Monday: Philadelphia Topography

Map Lovers’ Monday: Topography of Philadelphia from 1863

Black-and-white image of a creek with people around it and a large building behind it

Dock Creek Sewer in 1849: A report on its condition made to City Councils

From Creek To Sewer

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

Streams, islands, and ferries of early Philadelphia

Penn's Treaty with the Lenape

Penn’s Treaty with the Indians (Watson’s Annals)