Mill Creek Sewer under construction, 1883
Thomas Run sewer outlet during construction
Frankford Creek: Sad History of an Urban Stream title page
Bridge Street Draw. Southwest side of bridge. April 19, 1896. [Detail].
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.