Among the challenges of restoring a century-old pedestrian bridge are working without the guidance of original construction documents, preserving the historic character of the structure, and developing a design that meets modern requirements. Rather than simply replacing damaged and deteriorating parts, Duffield Associates sought to retain the original structural elements. Elements that were judged to be serviceable were specially cleaned and then protected from further deterioration. When this method was impossible, the engineering team designed replications of the originals. This approach satisfied both historical presentation and future maintenance concerns.

Duffield Associates' restoration of the Swinging Bridge represents the seamless integration of historical preservation efforts with modern technology. In addition to the accolades earned by this project from the engineering community, New Castle County has received an overwhelmingly positive response from its citizens. The success of this project has served as a catalyst for subsequent improvements throughout Brandywine Park.