Topics Technology & Engineering

Black and white photo of a man wearing a hat and standing on a bridge with his arm on a post

Wood truss drawbridge, Orthodox Street over Frankford Creek, 1899 [Detail]

Black and white photo of a low bridge over a creek

Bridge Street Draw, July 26, 1897

State Street pipeline construction

State Street pipeline construction, 1904

DeLaval Beauty Shots 6

Electric Pump Installations at Lardner’s Point Pumping Station

Engine House of the Belmont Works, R. Newell photo (2004.057.0074.001)

Engine House, Belmont Works

Two black-and-white photographs of pipeline construction on State Road. Depicted are a group of people, trees, buildings, a fire hydrant and a grid of boards over the pipes.

State Road triple pipeline construction, 1904

Eleven men in a work gang plug leaks in a tunnel, the Torresdale Conduit

Torresdale Conduit work gang, 1906

Black-and-white photograph showing the completed Upper Roxborough Filter system. Vaulted concrete ceiling with beds of filter sand.

Upper Roxborough Filter Beds Complete, 1903

1902 photo of Upper Roxborough Filter beds under construction

Upper Roxborough Filter Bed Construction, 1902

Jonval Turbines at New Mill House, 1870