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. 


The Independence-Sugar Watershed Floodplain Mapping project will produce Base Level Engineering (BLE) floodplains for the watershed in Atchison, Leavenworth and Wyandotte Counties. They are beginning to be produced and should be available in Fall 2020. We do not anticipate county-wide regulatory updates, but Discovery meetings will be held to discuss where regulatory updates are needed. This website will be updated with relevant content as the project moves forward.

Independence-Sugar Watershed Area

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)