


Plan of Philadelphia, John Hills, 1796

Frankford Creek Watershed: A historical overview of the Philadelphia section

Frankford Creek Watershed Historical Timeline

Drawing Dock Creek

Overbrook, as it was. A brief history of the Overbrook neighborhood of Philadelphia, focusing on changes in the natural landscape.

A Tour of Philadelphia’s Delaware River Waterfront in 1876

Cobbs Creek: A Brief Historical Overview by Adam Levine

Glossary of Drainage Terms by C. Drew Brown

Centre Square Water Works, Drawings of Intake Basin

Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
