


Old News: Two unusual underground rescues

Sandy Run Watershed and the Holmesburg Water Works

Lower Dublin Township, Philadelphia County, in 1848

Dripps map of Frankford and vicinity, 1849

Pennypack Park Map

Plans and maps of the Pennypack Creek Watershed in Philadelphia

Map of Frankford Borough, 1845

Philadelphia’s Sewer Problem

Sewer systems, City of Philadelphia, 1927 and 1929

Frankford Creek Watershed: A historical overview of the Philadelphia section
