Funny thing is, the Astoria/Megler Bridge has a clearance of 197 feet. It's exactly the same height as the Lewis and Clark Bridge at Rainier/Longview, which is, I assume, the bridge you ended up taking. I have family in St. Helens, so I cross the L&C bridge almost every time I go to Oregon. I hate the thing, not because I'm afraid of heights, but because it's so narrow, and it gets a shitload of truck traffic, so it shakes and vibrates like crazy.