Data Update: National Flood Hazard Layer

The Arkansas GIS Office is pleased to announce that we have published an update to National Flood Hazard Layer data for the State of Arkansas maintained by the Federal Emergency Management Agency (FEMA).

The National Flood Hazard Layer (NFHL) is a geospatial database that contains current effective flood hazard data. FEMA provides the flood hazard data to support the National Flood Insurance Program. You can use the information to better understand your level of flood risk and type of flooding.

The NFHL is made from effective flood maps and Letters of Map Change (LOMC) delivered to communities. NFHL digital data covers over 90 percent of the U.S. population.  New and revised data is being added continuously. If you need information for areas not covered by the NFHL data, there may be other FEMA products which provide coverage for those areas.

Please see below to read more regarding which NFHL layers this update pertains to.

Profile Basin and Stream Centerline

River Mile Marker

Base Index

Flood Control Structures

Letters of Map Revisions

Bench Marks on DFIRM

Flood Hazard Zone Polygon

Base Flood Elevation

DFIRM Panel Scheme

Flood Hazard Zone Line

Station Points