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. 

Lower Kansas Custom Watershed (Douglas County and Osage County)

The Lower Kansas Custom Watershed Floodplain Mapping update project produced Base Level Engineering (BLE) floodplains for the entire custom watershed. Enhanced data development began in 2022 for a regulatory update for Douglas County. This website will be updated with relevant content as the project moves forward.

Douglas County

Douglas County Kickoff Meeting - 04/28/2022

Douglas County Scoping Map

Osage County

The northern portion of Osage County, including the cities of Carbondale and Overbrook have been identified as needing an update to the regulator floodplain maps. This mapping project is focusing developing draft floodplain maps for this area and the project web page will be updated as the project moves forward.

Osage County Mapping Kickoff - 4/10/2023



Lower Kansas Custom Watershed

Lower Kansas & Independence-Sugar BLE Kickoff Presentation - 5-26-2021

Lower Kansas & Independence-Sugar Discovery Presentation - 9-2021

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.