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[quote user="futuremodal"] [quote user="Bucyrus"]I have heard of cases where a piece of freeway deck suddenly drops.  Earthquakes taken down bridges.  A barge can hit a bridge.  But I have never known of something this big happening in the normal life a bridge.  They must have large safety factors, and I am sure they keep track of deterioration issues.  Homeland Security said they cannot link it with terrorism.  One thing is for sure:  This cannot possibly go down as something that just happened to happen with no clear reason.[/quote]I was wondering.  Is this the first case of a steel arch bridge collapse for no immediately apparent reason?  I've read about past bridge disasters and can't find anything like this.[/quote]The cause is definitely baffling.  Nobody has a feasible explanation.  MNDOT inspects the bridge on a cycle not to exceed two years, usually every single year.  I saw one guy interviewed who said he has been in the bridge business for over 30 years, and has never seen or heard of anything like this.
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