Rainbow Bridge
The Rainbow Bridge, constructed in 1933, is the largest single-span Arch Bridge in the state of Idaho and a landmark structure on the Payette River National Scenic Byway.
The Problem
The reinforced concrete bridge, spanning 125 m over the Payette River, has been subject to decades of exposure to freeze-thaw cycles and de-icing chemicals, leading to the severe corrosion of the reinforcing steel and subsequent deterioration of the concrete. The bridge required significant rehabilitation to improve the structure’s safety while ensuring it was protected and preserved for its historical significance.
Our Solution
Selective repairs to the concrete were performed to the expansion joints and deck, including installing galvanic anodes in the repair areas to address future corrosion potential. The main span and piers of the bridge were treated with Electrochemical Chloride Extraction, removing the chlorides from the concrete and halting the corrosion of the reinforcing steel. The project was completed in a two-month period.
The Result
Current and future corrosion problems of the structure were addressed while maintaining the historical significance and aesthetics of the structure. By integrating our approach to corrosion problems, we were able to provide cost savings for the client.
Technology Used
These innovative products and technologies were used on this project.