Wood truss drawbridge, Orthodox Street over Frankford Creek, rebuilt 1899
Bridge Street Draw, view through bridge, July 26, 1897
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.