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Fox River Bridge, CTH K - Eureka, Wisconsin

Wisconsin’s Last Lift Bridge of Its Kind to be Preserved - Eureka, WisconsinThis project consisted of removing one of the last remaining Scherzer-type rolling lift bridges in the state of Wisconsin. The project included grading, base aggregate, HMA pavement, erosion control, marsh excavation, guard rail and replacement of the bridge with a four-span concrete girder poured deck bridge spanning a distance of 348 feet over the Fox River. The project also included the construction of a new intersection and a cul de sac with mountable curb and gutter.

CHALLENGES/SOLUTIONS
This project saw many challenges, especially when dealing with the high water issues. The use of barges and the construction of a temporary roadway for access to the barges and equipment were needed throughout the project. The environmental issues presented additional challenges due to high water levels which required the turbidity barrier to be increased in depth to approximately 16 feet instead of the anticipated lower water levels. Special care was needed when working in and around the water due to the juvenile fish and other aquatic wildlife. Continuous communication between the project and the DNR made the environmental issues easy to work through. Heavy silt and mud deposits on the floor of the river bed presented structural changes which required the over-excavation of the concrete seals at the three piers. Extra safety precautions had to be taken during the construction of the coffer dams due to the strong and swift current of the river. Additional testing and proper disposal of soils were required due to the discovery of contaminated soils within the project limits.

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