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 Middle Arkansas Custom Watershed

The Lower Middle Arkansas Custom Watershed Floodplain Mapping update project produced Base Level Engineering (BLE) floodplains for the entire custom watershed. Enhanced data development  for regulatory updates began for Harvey, McPherson, and Sedgwick Counties in 2021, and it is anticipated to begin in 2022 and 2023 for Reno and Barton Counties, respectively. This website will be updated with relevant content as the project moves forward.  The Kickoff Meeting was held virtually on October 27, 2020, and the Discovery Meetings were held January 12 & 13, 2021.  The presentation slides are located below.


Lower Middle Arkansas Discovery Presentation 1/13/2021

Lower Middle Arkansas Discovery Presentation 1/12/2021

Lower Middle Arkansas Custom Watershed Kickoff Meeting Presentation 10/27/2020

Data Development Funded Project Scopes


Harvey County Scoping Map
McPherson County Scoping Map
Sedgwick County Scoping Map

Data Development Future Planned Project Scopes

Barton County Scoping Map

Reno County Scoping Map


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 January 14, 2022