Subjects Engineering

The application of scientific principles to practical ends as the design, construction, and operation of efficient and economical structures, equipment, and systems; also the profession of or the work performed by an engineer. Good practices in the various subdivisions of this field, including civil, sanitary, and transportation engineering, are the foundation of any city's well-being and livability.

Bridge Street Draw. Southwest side of bridge. April 19, 1896. [Detail].

Bridge Street Draw, April 19, 1896. [Detail of men]

Bridge Street Draw. General view of old draw, ca 1896

Torresdale Conduit work gang, 1906

Torresdale Conduit work gang, 12/18/1906

Cumberland Street pipeline, 1907

Bureau of Water, Cumberland, west of 13th Street, pipe line, 1907

State Street pipeline construction

State Street pipeline construction, 1904

Finished Upper Roxborough filters, 1903

Finished Upper Roxborough filters, 1903

Upper Roxborough filter beds

Upper Roxborough filter beds under construction, July 1902

Laying the Main (2004.057.0074.007)

Commencement of laying the main on the East side of the River, 1871

New Mill House at Fairmount (2008.001.0046)

New Mill House at Fairmount

Tinted image of a single-arch bridge over a river with landscape in the distance

Lancaster/Schuylkill Bridge (Upper Ferry Bridge)

Devereaux Street Sewer on the cover of Philadelphia magazine, 1911

Devereaux Street Sewer, Philadelphia magazine, 1911