Darn. Was so sure... What about the Atchafalaya Basin bridge? Had to google the spelling.
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The bridge in Louisiana, Lake Ponchtrain, or something?
Chesapeake Bay Bridge-Tunnel is what I've got. Built in 1964.
This Engineering Marvel Functions as Both a Bridge and a Tunnel
One off the internet. Let's see if I hid the photo tag[bigwhistle]
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