FEMA Flood Mapping Update

FEMA Flood Map Update

Flooding is the most frequent and costly disaster in the United States. The risk for flooding changes over time due to erosion, land use, weather events and other factors. Due to these changes, the flood maps for the City of Grimes and Polk County have been updated.

The current FIRMs for the City of Grimes were adopted in 1992 and do not accurately reflect today’s risk of flooding.

To view the Effective Flood Maps, please navigate the links below.

These maps illustrate the changes from previously adopted FIRM to the new effective FIRM

The new maps help promote public safety.  The Flood Insurance Rate Maps are important tools used in the effort to protect lives and properties in the City of Grimes.  By showing the extent to which areas of Grimes and individual properties are at risk for flooding, the Flood Insurance Rate Maps help property owners and residents make more informed decisions about personal safety and financially protecting their property.  These maps also allow community planners, local officials, engineers, builders and others to make determinations about where and how new structures and developments should be built.

Additional Questions.  If you have questions or require additional information, please contact Alex Pfaltzgraff at apfaltzgraff@grimesiowa.gov or call 515-986-4050.