I suspect that an earthquake capable of damaging that bridge would cause a lot of other problems in the area.
40 minutes — That’s how long Astoria may have to escape tsunami“
For those in Astoria hoping to escape the tsunami or flooding, heading to high ground is your best bet, he said.
It’s not the best idea to think about getting out of town,” he said. “Regardless of the dam or the tsunami, the bridges in the area will probably fail in an earthquake. Slides are going to happen.”
According to the state DOTs, painting to protect the steel is their biggest concern. The only earthquake concern I can find is about the concrete approach span on the Oregon side. The tall steel structure will sway a lot, but is probably more resilient than many other bridges in the two states.
Last fall high winds closed the bridge for a while.
http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/26460463/srt/pa/pging/1/page/1.cfmhttp://photos.oregonlive.com/oregonian/2012/10/astoria-megler_bridge_closure_1.htmlhttp://www.rv.net/forum/index.cfm/fuseaction/thread/tid/26536674/gotomsg/26537033.cfm#26537033Also highwinds tipped a semi in Novemeber.