I used to think floodplain status was mainly a lender's headache — flood insurance costs, maybe some restrictions on building. I was completely wrong, and it cost me serious time and goodwill with a land trust partner.
When I was helping scout a riparian parcel for stewardship purposes a few years back, we assumed the FEMA maps were the whole story. They weren't. The county had a separate floodway delineation that was far more restrictive than the floodplain boundary. We couldn't install the erosion control structures or bank stabilization plantings we'd planned without a costly permit process that dragged on for over a year.
In the Ozarks especially, those two designations — floodplain versus floodway — are treated very differently by regulators, and almost nobody warns buyers upfront. Your realtor probably doesn't know the difference either.
If you're buying creek bottomland with any restoration intent, pull the actual FIRM panels AND call your county floodplain administrator before you're anywhere near closing.
Has anyone else run into a county overlay or local ordinance that made the federal maps almost irrelevant to what you could actually do on the ground?