Significant challenges to say the least.
Hwy 90 barely accomdates the local traffic since the new Superwalmart and Home Depot came in. Now rerouting all the traffic that normally flows through I-10 through the communities of Milton, Pea Ridge, and Pace will be tough indeed. This is an area where one could still easily count the traffic lights! It just isn't suitable for heavy traffic.
There are no nearby alternate routes for traffic flowing on I-10. Look at the regional maps. Cut I-10 at Pensacola and you really impact all east-west traffic.
Seriesly, this is hugh. Hugher than anyone not local can imagine. And I'm trying to keep some humor, so that the moose won't eat my cheese. I guess I'll take a shower.
Is highway 90 limited or full access?
Looking at zooms of the I-10 bridge image, I don't see any evidence of piers out of alignment, but even so, the time to repair it will be weeks at minimum, more likely months. You're looking at a year or more if they have to dig and set new piers.
Hey, better a shower than a torrential downpour...