Items

Historic resources from our archives - images, maps, documents, and more.

Black-and-white photo of industrial tank installation with smokestacks and factories in the background

Emscher Tank Installation at Essen Nord, Germany

Black-and-white photograph of a man in a hat standing in a brick trench

Grit Chamber, Essen, Germany

Black-and-white photo of heavy machinery

Sludge Presses for Grease Recovery, Bradford, England

Black-and-white image of a tray with three compartments and four small glass cylinders

Drain water from sludges obtained from sedimentation, septic and Emscher tanks

Black-and-white image showing a man standing in a large concrete half-pipe

Thomas Run sewer outlet during construction

Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia

Six people and dozens of sandbags performing a load test on a concrete pipe, 1914

Pipe Test, 1914

Spring Garden Sewage Experiment Station, used to test water filtration methods

Outside Sprinkling Filters, Spring Garden Sewage Experiment Station, 1911

Devereaux Street Sewer on the cover of Philadelphia magazine, 1911

Devereaux Street Sewer, Philadelphia magazine, 1911