Iowa Flood Insurance What Is The Area Known As The 500-year Flood Plain In Iowa City?

What is the area known as the 500-year flood plain in Iowa City? - iowa flood insurance

We live in Iowa City, witnessed the flooding. Because we do not buy insurance against floods, I know that our systems are not technically in a flood zone, but I would be able to a map that clearly defines the areas of the city view in meadows 100 years ago (before everything) the pastures of 500 years.