Picture Source: nbcchicago.com
While several of the DBA staff were at the DFI 38th Annual Conference on Deep Foundations last week, we received texts and calls from colleagues wondering if we had been called about the apparent foundation failure at the Leo Frigo Memorial Bridge in Green Bay, Wisconsin. As of now, DBA has not been asked to be involved with the evaluation. The Wisconsin DOT is currently investigating. Our friend, Randy Post over at Geoprac.net has a post on the event, including a CNN video report that also recounts some other more dramatic bridge failures that were NOT due to foundation failures.
This bridge was built in 1980 and the “failure” is limited to a single pier that has subsided or settled a couple of feet in a rather sudden manner.
The Green Bay Press Gazette has this article with some video. There is also an article noting that a petroleum pipeline is near the subject pier.
Actual failures of a foundation are rare, so if this is such a case, this will make a very interesting case history once the cause is determined. Stay tuned for more developments.