Lafayette Bridge Project
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St. Paul, MN
Minnesota Department of Transportation
The project included Bridges 62018 and 62017 that are each 3,209 ft, 14 span structures with a 362 ft main span over the Mississippi River. Work activities on these structures included cofferdam installation,42” OD pile driving, substructure construction, structural steel fabrication, structural steel erecting, and superstructure construction. The river piers are located on the edges of the Navigation Channel and required considerable coordination with the United States Coast Guard as well as the local stakeholders that move freight through this section of the river. To accomplish this, Lunda developed Navigation Plans that were reviewed and approved by the Coast Guard and local stakeholders. During the construction engineering and planning phase of the cofferdam designs, Lunda considered all the risks associated with the fluctuating water elevations of the river and designed the cofferdams to an elevation that would allow us to continue working unless there was a major flood event. The work required that Lunda coordinate with the Corps of Engineers and City of St. Paul as four of the land piers were located in flood protection levees. The Corps and City did not want the levees compromised. Lunda developed means and method to work over the top of the levees that allowed the work to be completed without any impacts.
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