FEMA has a project underway to update the flood risk information for Doniphan County, KS. The preliminary Flood Insurance Study (FIS) and Flood Insurance Rate Maps (FIRMs) was made available on 4/2/2021 and can be downloaded from FEMA's Flood Map Service Center (MSC):
https://msc.fema.gov/portal/home. The Doniphan County Flood Insurance Study is anticipated to go effective in January 2024.