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 produced Base Level Engineering (BLE) floodplains for the watershed in Atchison, Leavenworth and Wyandotte Counties. We do not anticipate county-wide regulatory updates at this time, however this project page will be updated if it moves forward into regulatory updates.

Independence-Sugar Watershed Area

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.