For the second time in just two months, Gannett Fleming’s work on the PA Route 926 Over Brandywine Creek Bridge Replacement project received recognition. The Association for Bridge Construction and Design (ABCD) Susquehanna Chapter presented the firm with the Outstanding New or Reconstructed Medium Span Bridge Award during the 2018-2019 ABCD Awards Program on April 29.
Gannett Fleming, in partnership with the Pennsylvania Department of Transportation, developed a creative design solution to rebuild the 80-year-old, flood-prone Brandywine Creek Bridge and improve mobility for 13,200 vehicles per day despite extreme site conditions and an accelerated six-month schedule.
The challenges of the site inspired a solution that included rebuilding 1,700 feet of roadway approaches and raising them 9 feet to reduce the potential for flooding. The team realigned 800 feet of the adjoining Creek Road to integrate with the elevated roadway and installed two 48-foot-span arch culverts that carry Route 926 over Radley Run. The new culverts replaced a significantly undersized 4-foot-by-6-foot arch pipe that caused flooding and frequent road closures.
The 926 Bridge was skillfully designed and constructed without impacting historic properties that flank the bridge: the Brandywine Battlefield National Historic Landmark, honoring a significant land battle of the American Revolution, The Painter Farm and Mill Complex, and the 1890 Pocopson Train Station. Additionally, stone form liners covering the piers with an open, higher railing aesthetically integrate the structure into the community.
Previous awards for this project include the Delaware County Chapter of the Pennsylvania Society of Professional Engineers 2019 Outstanding Project Award and the American Society of Highway Engineers Delaware Valley 2017 Project of the Year Award.