the irondequoit bay bridge is a continuous truss bridge spanning irondequoit bay in eastern monroe county, new york, in the united states. it is wide and carries the six-lane new york state route 104 (ny 104) from the town of irondequoit on the west side of the bay to the town of webster on the bay's east side. the western approach is just east of ny 104's interchange with ny 590. the bay bridge was built in 1967, has nine spans and handles an average of 67,229 vehicles per day as of 2006.