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Fremont, Ballard, and University Bridge are double-leaf bascule bridges located in Seattle, WA. All three bridges operate frequently, with Fremont in particular being one of the most frequently opened moveable drawbridges in the US. The bridges also have significant historical and aesthetic significant to Seattle, and are all listed on the National Register of Historic…

The Robert O. Norris, Jr. Bridge is slated for replacement beginning in 2028. In the interim, critical repairs are underway to ensure the bridge continues to safely serve the surrounding communities. These repairs are scheduled for completion by September 2026. BDI is proud to support the Virginia Department of Transportation (VDOT) in this important effort.…

As part of the evaluation of the Newark Airport Monorail Guideway, BDI completed live-load testing, deflection modeling, and a 90-day continuous monitoring program to assess how the guideway was performing under real-world operating conditions. Instrumentation was installed at three representative sections of the guideway, with sensors placed on both the track girders and supporting piers.…

BDI was engaged by the Virginia Department of Transportation (VDOT) to support emergency monitoring efforts at the Route 644 bridge over the Meherrin River in Brunswick County, VA. The bridge had been closed due to settlement at its central pier, possibly due to scour, which prompted the need for real-time tracking of structural movement during…

BDI was selected to design and install a permanent structural health monitoring (SHM) system for the Marine Parkway Gil Hodges Memorial Bridge in New York City. Working in collaboration with CRC Associates and the Triborough Bridge and Tunnel Authority (TBTA), BDI developed a custom monitoring solution as part of mechanical and electrical upgrades to this movable bridge…

The Virginia Department of Transportation engaged BDI to perform a comprehensive structural evaluation of two twin reinforced concrete T-beam bridges along Interstate 81 in Smyth County, VA — an essential corridor for heavy truck traffic. After a construction contractor completed concrete repairs, including the application of a latex-modified concrete (LMC) overlay to the bridge decks,…

To ensure the long-term performance of two twin reinforced concrete T-beam bridges carrying Interstate 81 over Tattle Branch Road in Smyth County, Virginia, the Virginia Department of Transportation (VDOT) engaged BDI to evaluate recent concrete repairs. These bridges serve a vital role on a heavily traveled truck route, making structural reliability a top priority. Following the contractor’s application…

BDI partnered with Pickering, Corts & Summerson to assist their National Highway Institute (NHI) routine inspection of the I-380 near Scranton, Pennsylvania bridge over Delaware and Lackawanna Railroad. The bridge’s complex geometry and limited accessibility presented challenges for traditional inspection methods. To enhance visual coverage and documentation, BDI provided drone inspection services, enabling access to…

Bridges with unknown reinforcement and/or material properties present a unique challenge for owners. Lack of adequate structural information, often caused by lost or damaged plans, prevents these structures from being properly evaluated, and leads to uncertainty about the adequacy of these bridges for current design, legal, and permit loads. To help bridge owners facing this…