Topics Technology & Engineering

Philadelphia Underground, Jan. 29, 1961

“Philadelphia Underground,” Jan. 29, 1961

PWD water tech at the Philly Home Show, 1960

PWD water tech at the Philly Home Show, 1960 (detail)

State Street pipeline construction

State Street pipeline construction, 1904

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