Preserving a Historic Crossing While Restoring Strength
In Mount Holly Township, the White Street Bridge has long served as a local crossing and a piece of the community’s historic fabric. Over time, the brick masonry arch began to show signs of significant deterioration, reducing its structural capacity and raising concerns about its long-term performance.
The challenge was clear. Strengthen the bridge without losing what makes it historic.
Reinforcing from Within to Protect What Matters
Our team developed a solution that works with the existing structure rather than replacing it. By installing a precast concrete liner beneath the brick arch, we were able to restore structural capacity while preserving the original masonry above. This approach allowed repairs to be made without altering the visible character of the bridge.
To support the design, we used 3D laser scanning to capture the irregular geometry of the existing arch, ensuring the liner fit precisely within the structure. This level of detail helped reduce uncertainty and maintain the integrity of the historic materials.
The project required close coordination across disciplines and stakeholders. Our services included surveying, structural design, hydraulic analysis, environmental permitting, and utility coordination, along with ongoing collaboration with the local historic committee and the State Historic Preservation Office.
The result is a strengthened and stabilized bridge that continues to serve the community while preserving its historic identity. It is a solution that respects the past while ensuring the structure can perform well into the future.