Flood Plain Mapping

Map of Iowa, Floodplain Mapping Status April 2014The IDNR has partnered with the Iowa Flood Center (IFC) at the University of Iowa and seven (7) nationally recognized floodplain mapping firms, to develop flood hazard studies throughout the State.  The goal of these flood hazard studies is to develop new base-level (approximate) flood hazard areas (Zone A areas) and incorporate existing enhanced-level (detailed) flood hazard data (Zone AE areas) into digital and hard copy maps that can be used by communities to better understand, manage and mitigate flood risk.

The 1% annual chance (100-year) and 0.2% (500-year) annual chance flood events are being mapped. The flood studies are being completed in compliance with the standards established by the Federal Emergency Management Agency (FEMA) and will in the future become the new regulatory Flood Insurance Rate Map (FIRM) and Flood Insurance Study (FIS) for your community.

For more information:
Scott Ralston
DNR Floodplain Mapping Coordinator