Description
Glass lantern slide of an illustration of the Walnut Lane Bridge over the Wissahickon Creek in Philadelphia. The concrete arch bridge carries Walnut Lane over the Wissahickon connecting Germantown and Roxborough. It was a Department of Public Works project designed by George S. Webster and Henry H. Quimby. When it opened in 1908, it was the longest and highest concrete arch bridge in the world. The drawing depicts the entire length of the bridge across the Wissahickon Creek and Wissahickon Drive with the surrounding wooded expanse of Fairmount Park. Multiple horse and carriages are seen crossing the bridge. Beneath the oval-shaped illustration, the data of the bridge is given: Main span, 233 ft. clear; Rise of main arch, 70 ft. 6 in.; Approach spans, 53 ft. clear; Spandrel arches, 20 ft. clear; Total length of bridge, 585 ft.; Height above creek, 147 ft. Used to illustrate the course "Civil Engineering Structures" which was taught between 1893-1950 at the Wagner Free Institute of Science, Philadelphia, Pa.
Sponsorship
This Digital Object is provided in a collection that is included in POWER Library: Pennsylvania Photos and Documents, which is funded by the Office of Commonwealth Libraries of Pennsylvania/Pennsylvania Department of Education.
