The 7th bridge on our list is the Atchafalaya Basin Bridge all though I do not have much information about this bridge nor do I know how much steel was used on this bridge. 

 below the Atchafalaya Basin Bridge

 If anyone has information to add please comment so we can add information.  This is what we do know as of this posting Atchafalaya Basin Bridge is the 7th longest bridge in the world and the 6th longest over water. The bridge is located in Louisiana, USA and carries interstate 10 over the Atchafalaya Basin the bridge has a total length of 96,095 feet or 18.2 miles long. 

Atchafalaya Basin Bridge

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