Wow, that's incredible. I didn't even know there was a Manatee Dam. (My in-laws lived in Manatee County back in the 1990s.)
I feel bad for the Lakewood Ranch residents. They didn't ask for this!
It will take some time to learn whether the residents knew they were in the Lake Manatee flood plain when they purchased their property.
I recall 20+/- years ago there was a threat to the dam integrity when one of the gates was stuck. It made national news with choppers flying over, waiting for the dam to break and cause a disaster.