This Mississippi River bridge was opened in 1896. It is included in the National Register of Historic Places. It is a through truss bridge with a 360-foot rim bearing swing span. It carries two railroads tracks on its upper level and two vehicular lanes and two pedestrian lanes on its lower level.

Modjeski and Masters was contracted to perform emergency repairs on two separate occasions for this bridge.

Emergency End Lift Repairs
Modjeski and Masters was contacted by the bridge owner to provide engineering support for emergency repair of end lift actuators following failure of an existing air cylinder. Modjeski and Masters worked with the U.S. Army Corps of Engineers on a temporary hydraulic retrofit which was successfully installed nine days after our initial contact. The hydraulic retrofit was used successfully for the remainder of the operating season.

Upper Tread Plate Repairs (Emergency and Permanent), Structural Inspection, Fatigue Analysis and Strength Rating
Modjeski and Masters was contacted by the bridge owner and U.S. Army Corps of Engineers to evaluate possible problems with a repair project being performed relating to the upper tread plate and drum girder assembly. Modjeski and Masters was able to affect immediate modifications to allow limited bridge operation to accommodate barge traffic. We then designed and provided construction support services for permanent repair of the upper tread plates to restore normal operation. The client also engaged us to perform an in-depth structural inspection of the entire bridge consisting of eight spans totaling approximately 1,850 feet. Detailed strength and fatigue ratings of the bridge were also performed which corrected a flawed previous analysis (by others) which had indicated an exhausted fatigue life. The refined fatigue analysis proved that the bridge has substantial fatigue life remaining.