Flooding in Allen County is primarily from overflows of the Maumee, St. Joe, and St. Mary's rivers and their tributaries. These tributaries are many of the creeks, ditches, and streams covering Allen County. The Federal Emergency Management Agency (FEMA) and the Indiana Department of Natural Resources (IDNR) in cooperation with the Maumee River Basin Commission (MRBC) produce Flood Insurance Studies and Flood Insurance Rate Maps which lay out the special flood hazard areas in Allen County.
These mapped special flood hazard areas (areas subject to inundation by the 1% annual chance flood) cover many of the studied flooding risk areas; however, there are other areas in Allen County that may be at risk for flooding and are not currently mapped as special flood hazard areas.
Please contact the Department of Planning Services for further flood-related information and flood-related questions.
The Department of Planning Services has elevation certificates for new development subject to floodplain management regulations since 1990 for Allen County. Please contact our office if you are interested in copies of these elevation certificates.