What is a Letter of Map Revision (LOMR)?
A Letter of Map Revision (LOMR) is an official revision, by letter, to an effective NFIP map. A LOMR can be issued when a property owner or a community makes artificial improvements that would eliminate or mitigate the potential flood hazard for specific properties. These improvements include the addition of fill to raise land above the BFE or channel construction for creeks. A request for a LOMR must always be made in concurrence and cooperation with the local community. FEMA considers all requests for LOMRs carefully, in part to ensure that changes made in the floodplain do not adversely affect surrounding areas.
A LOMR is an official revision to the currently effective FEMA map. It is used to change flood zones, floodplain and floodway delineations, flood elevations, and planimetric features. All requests for LOMRs should be made to FEMA through the chief executive officer of the community, since it is the community that must adopt any changes and revisions to the map. If the request for a LOMR is not submitted through the chief executive officer of the community, evidence must be submitted that the community has been notified of the request.
