The pic of the bridge that I posted came from here:
http://www.gatesofdixie.com/New_Orleans/new_orleans.html
The caption is this:
"Lake Pontchartrain is home to what we now suspect is the second longest over-water bridge in the world, the Lake Pontchartrain Causeway, originally built in 1956. The twin spans of the Causeway (the second span, 80 feet away handles traffic in the opposite direction and was opened in 1969) is an amazing 23.8 miles across, and is held in place by 9,000 concrete pilings. During the day, as you approach the middle of the bridge, you can see no land in either direction. At night, you can faintly see the city lights. An eerie feeling until you get used to it. Click the pic to visit their website."
I am kind of confused if that picture was the right one.
I posted to you before - my understanding is the causeway (the one you posted a picture of) is fine. It is the I-10 bridge that is gone or badly damaged. It is on the right side of the lake in this picture.
http://img5.picsplace.to/img5/2/Katrina_Track.jpg