Ottawa Road Bridge

Ottawa Road over CSX Railroad and I&M Canal


LaSalle County Highway Dept.


LaSalle County, Illinois

Construction cost


BB&A performed preliminary and final design services for the rehabilitation of this three span bridge. The existing structure was built in the 1970s on a steep downgrade from north to south that required over 20 feet of embankment. The bridge had experienced movement that caused uphill expansion to close and downhill joint to open, which was counterintuitive to gravity-induced movements. A prior attempt at rehabilitation in the mid-1990s had not provided a long-term fix. BB&As task was to find the cause of movements and provide a long term solution.