Floodplain Mapping Projects

FEMA has available several services for different phases of a mapping project. Preliminary, Pending and Effective products can be downloaded on from the Map Service Center. FEMA also maintains several map viewers:

National Flood Hazard Layer - displays the effective digital data
> Flood Map Changes Viewer  - includes the Preliminary and Pending digital map data, with a Changes Since Last FIRM layer that compares the Preliminary/Pending data with the effective data


KDA maintains project-specific map viewers for active projects that are based on the same digital data. The web links are included on the project pages below. 

Upper Cottonwood (Marion County)


Marion County was selected for a countywide update in 2019. The project will produce updated flood studies throughout the county and incorporate the existing effective flood study in the City of Marion that was produced for the levee accreditation efforts. The project was kicked off in January 2019, and a Flood Risk Review meeting was held on November 17, 2020.

Marion County Project Review Web Map

Marion County FRR Presentation 11-17-2020

Marion County FRR Handout 11-17-2020

Marion County Scoping Map

Upper Cottonwood Discovery & Initial Map Review 9-26-19

Marion County Kickoff Presentation 1-15-19

Marion Kickoff Handout 1-15-19


Unsure which watershed you are in?  Use the following link to find out.
Kansas HUC 8 Watershed Map

Or reference the map below for Custom Watershed project areas.

Project Reference Map

Use this page to find relevant information on floodplain mapping projects.  Click on the map below to view current or proposed floodplain mapping projects.  Use the Kansas Floodplain Map Viewer for current effective floodplains.

Project Status Map (updated December 4, 2020)