I ride across this bridge to work every day:

http://www.portlandbridges.com/00,35...nd-oregon.html

Here's a better view of the path one rides across on a bike. They have since painted bike/pedestrian stripes on it:

http://www.deuceofclubs.com/w/great_.../hawthorne.htm

It is nothing like the GGB or the big ones on the Columbia, but there are some windy days that make going across it kind of unpleasant.