Irondequoit Bay Bridge

Monroe County, NY

Vertical Access was retained by DiDonato to assist with the 2012 – 2013 Biennial and Interim Bridge Inspection (NYS DOT Region 4) of the Irondequoit Bay Bridge, which carries Route 104 over the Irondequoit Bay of Lake Ontario. Vertical Access technicians worked along the full 2,375-foot length of the bridge to inspect structural members that were inaccessible by under-bridge inspection units (UBIU).

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Bridge description

The Irondequoit Bay Bridge is a steel truss bridge spanning the Irondequoit Bay in Monroe Country, New York. Constructed between 1967 and 1969, the bridge totals 2,375 feet in length. Sitting atop the ten concrete piers are nine truss spans. Six of the spans are flat, while the center, arched span is flanked by a half arch on either side.


  • Provide 100% hands-on inspection of structural under-deck members at all areas inaccessible by UBIU.
  • Project was scheduled for mid-winter with short days and during a period of consistently sub-zero temperatures.
  • Multiple inspectors on site required a streamlined system of collecting standardized data.


  • Combined industrial rope access and conventional fall protection rigging solutions to allow for time-efficient inspection of members inaccessible by UBIU.
  • Met project deadline by maximizing use of available daylight in daily schedules.
  • Supplied investigation team with TPAS® tablet computers preloaded with customized survey forms to provide uniform inspection data output for all inspectors.

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