[Hunble]

You and I are seeing the same images.

However, using Google Earth, I am even more convinced that the outflow of the lock is what eventually caused this bridge to fall.

My wife and I have been over that bridge thousands of times, and we were absolutly shocked today. My God, that could have happened to us!

[Straight Vermonter]

This gives a good view of the lock relative to the bridge.

http://maps.google.com/maps?f=q&hl=en&geocode=&q=44+58+42.62+N+93+14+42.56+W&ie=UTF8&ll=44.9785,-93.245564&spn=0.000749,0.001695&t=k&z=19&om=0