Monitoring the Marine Parkway Bridge for Long-Term Performance

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 structure.

The system integrates a range of sensors and technologies to track the lift bridge’s structural behavior during operational procedures. This includes tiltmeters and accelerometers to measure movement and vibration experienced by the towers during lifting and a weather station to correlate environmental conditions with structural response. Additionally, infrared cameras and air gap sensors (for measuring under-bridge clearance) were installed for managing the navigational channel and investigating ship collisions. Data from the system is collected and synchronized through a wireless system and made uploaded to a secure online portal. BDI’s monitoring interface allows stakeholders to view live data, see warnings and alerts, and analyze trends over time without needing to manually download or process files. Once operational, BDI provided training and support to ensure the Owner could confidently manage the system and interpret the data.

By combining structural, environmental, and visual data into a single platform, the SHM system helps TBTA maintain a clear picture of the bridge’s condition—supporting proactive maintenance and ensuring continued safety and reliability for the traveling public.