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Letter of Map Revision Based on Fill (LOMR-F)

A Letter of Map Revision Based on Fill (LOMR-F) is FEMA's modification of the Special Flood Hazard Area (SFHA) shown on the Flood Insurance Rate Map (FIRM) based on the placement of fill outside the existing regulatory floodway.

All requests for changes to effective maps, other than those initiated by FEMA, must be made in writing through the Chief Executive Officer (CEO) of the community or an official designated by the CEO.

Because a LOMR officially revises the effective National Flood Insurance Program (NFIP) map, it is a public record that the community must maintain. Any LOMR should be noted on the community''s master flood map and filed by panel number in an accessible location.

National Flood Insurance Program Requirements

  • 65.5 - Revision to special hazard area boundaries with no change to base flood elevation determinations
Glossary Section
NFIP - National Flood Insurance Program