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Irondequoit Bay Outlet Bridge


Photo taken by Mandellbrad

License: Creative Commons Attribution-Share-Alike (CC BY-SA)

View this photo on Wikipedia

BH Photo #353399


Street Views 


Written by J.R. Manning

The Irondequoit Bay Outlet Bridge, or IBOB, is a bobtail swing pony truss bridge that carries Lake Road across the outlet of Irondequoit Bay on Lake Ontario. Well, it carries Lake Road from November 1 to April 1 every year, but is locked in the open position between April 1 and November 1. This allows marine traffic between a state park on Irondequoit Bay and Lake Ontario. The bridge has become controversial with residents of both Sea Breeze and Webster that are either connected by or separated from each other by the bridge.

The swing bridge is steel and concrete, 185.5 feet in length on two spans, the roadway is 24 feet wide with two pedestrian walkways, although only one is available when the bridge is in the open position. The main span is steel, 132.5 feet in length on the eastern side of the pivot with a counter-weighted 53-foot, concrete span on the western end. The bridge weighs in at 425 tons.

Why not just open and close it as necessary? To open or close the bridge requires about two hours of setup time, 30 minutes turning time and 2 hours of set-down time.

IBOB, in a manner of speaking, replaced a two-lane bridge that carried Lake Road across the channel from 1929 to 1985. The original bridge was removed in 1985 to open the Irondequoit Bay to marine traffic from Lake Ontario and created a state park at the bay outlet. IBOB was built in 1997 as part of a $4.8 million project.

A feasibility study has been conducted to explore options to provide year-round access across the Bay Outlet.


Seasonal bobtail Warren pony truss swing bridge over Irondequoit Bay on Lake Road
Irondequoit, Monroe County, New York
Open to traffic
Built 1998
- Crane-Hogan Structural Systems of Spencerport, New York (Contractor)
- Erdman Anthony & Associates Inc. of Rochester, New York (Designer)
- Hardesty & Hanover of New York, New York (Consultants)
- Harris Structural Steel Co. of South Plainfield, New Jersey (Fabrication)
Warren pony truss swing
Also called
Approximate latitude, longitude
+43.23483, -77.53355   (decimal degrees)
43°14'05" N, 77°32'01" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/294278/4790009 (zone/easting/northing)
Quadrangle map:
Rochester East
Inventory number
BH 62475 (Bridgehunter.com ID)

Update Log 

  • August 26, 2018: New photos from Dana and Kay Klein
  • May 27, 2018: Essay added by J.R. Manning
  • May 19, 2018: New Street View added by Dana and Kay Klein
  • May 9, 2016: New photo from Luke
  • May 9, 2016: New Street View added by Douglas Butler
  • August 14, 2014: Added by Douglas Butler