Floating above the tree-lined Charles River Esplanade, Boston’s Frances “Fanny” Appleton Pedestrian Bridge marries sculptural elegance with functional urban connectivity. Named for the wife of poet Henry Wadsworth Longfellow, the curvilinear, ribbon‑like structure features 550 feet of continuous steel girders supported by a signature tubular arch. With its sweeping form, graceful branching pathways, scenic overlook plaza and curved stair connections – and without a single center pier – the bridge appears to hover above Storrow Drive, providing pedestrians with seamless access to some of Boston’s most iconic destinations while framing dramatic views of the restored Longfellow Bridge.
What challenges did STV address?
The project required replacing an outdated, insufficient crossing with a highly visible, architecturally expressive structure that could withstand heavy pedestrian traffic and meet stringent performance criteria. Complex geometries, fabrication constraints and vibration‑control requirements demanded advanced engineering solutions, all while maintaining the historical character of the Charles River Basin and ensuring cost-effective constructability.
What solutions did STV deliver?
STV provided engineering design services to the WSC Joint Venture team (J.F. White, Skanska, Consigli), addressing fabrication, constructability and pedestrian-induced vibration performance. Working closely with the design-build team, STV introduced cost-effective refinements that preserved the architectural vision, improved construction sequencing, and enhanced the user experience. The resulting structure delivers both iconic aesthetics and long-term durability.
How does this project benefit the region?
The bridge strengthens multimodal access between key cultural and recreational destinations along the Charles River and Beacon Hill. By replacing an inadequate pedestrian link with an accessible, visually striking connection, the project enhances safety, promotes active transportation and enriches the public realm for residents and visitors alike.
Key stats and accolades
- Multiple industry honors from the International Bridge Conference, American Institute of Steel Construction, National Steel Bridge Alliance and American Council of Engineering Companies
- 550-foot, continuous steel girder design
- Tubular arch signature span with no center piers
- Scenic overlook plaza and ADA‑accessible pathways
