Uploaded February 2026 | Updated September 2026, 15 hours ago
Delve into the world of acronyms! An in-depth walk-through of LOMAs, LOMR-Fs, LOMRs, and CLOMRs. We’ll talk about the Letter of Map Amendment (LOMA) options to update the FEMA zone for structures that are shown in the FEMA mapped floodplain, but that are actually above the Base Flood Elevation based on better elevation data. We’ll also cover highlights of letters of map revision based on fill (LOMR-Fs). Then we’ll dive into more details on the application process for Letters of Map Revisions (LOMRs) - actual map changes. Target audience is local officials, engineers and surveyors.
Presenters: Ceil Strauss and Madison Rogers
Helpful related websites:
• FEMA’s Change Your Flood Zone Designation page - fema.gov/flood-maps/change-your-flood-zone
• FEMA’s Letter of Map Amendment & Letter of Map Revision-Based on Fill Process page - fema.gov/flood-maps/change-your-flood-zone/loma-lomr-f
• January 2021 Water Talk article on eLOMAs by FEMA - content.govdelivery.com/accounts/MNDNR/bulletins/2bcad3d#link_13
• FEMA’s Online LOMC application page - hazards.fema.gov/femaportal/onlinelomc/signin
• Creating LOMA with LiDAR Map Using DNR’s Lake & Flood Elevations Online (LFEO) application video (less than 9 minutes) - youtu.be/Ho-qnaGmIQg
• FEMA National Flood Hazard Layer (to see LOMAs/LOMR-Fs turn on “LOMA” Layer - hazards-fema.maps.arcgis.com/apps/webappviewer/index.html?id=8b0adb51996444d4879338b5529aa9cd
• DNR Map Amendments and Revisions page - dnr.state.mn.us/waters/watermgmt_section/floodplain/map_appeals.html
• DNR Lake & Flood Elevations Online (LFEO) viewer - arcgis.dnr.state.mn.us/ewr/lfeo/lat/46.4055/lng/-94.2779/z/6
Delve into the world of acronyms! An in-depth walk-through of LOMAs, LOMR-Fs, LOMRs, and CLOMRs. We’ll talk about the Letter of Map Amendment (LOMA) options to update the FEMA zone for structures that are shown in the FEMA mapped floodplain, but that are actually above the Base Flood Elevation based on better elevation data. We’ll also cover highlights of letters of map revision based on fill (LOMR-Fs). Then we’ll dive into more details on the application process for Letters of Map Revisions (LOMRs) - actual map changes. Target audience is local officials, engineers and surveyors.
Presenters: Ceil Strauss and Madison Rogers
Helpful related websites:
• FEMA’s Change Your Flood Zone Designation page - fema.gov/flood-maps/change-your-flood-zone
• FEMA’s Letter of Map Amendment & Letter of Map Revision-Based on Fill Process page - fema.gov/flood-maps/change-your-flood-zone/loma-lomr-f
• January 2021 Water Talk article on eLOMAs by FEMA - content.govdelivery.com/accounts/MNDNR/bulletins/2bcad3d#link_13
• FEMA’s Online LOMC application page - hazards.fema.gov/femaportal/onlinelomc/signin
• Creating LOMA with LiDAR Map Using DNR’s Lake & Flood Elevations Online (LFEO) application video (less than 9 minutes) - youtu.be/Ho-qnaGmIQg
• FEMA National Flood Hazard Layer (to see LOMAs/LOMR-Fs turn on “LOMA” Layer - hazards-fema.maps.arcgis.com/apps/webappviewer/index.html?id=8b0adb51996444d4879338b5529aa9cd
• DNR Map Amendments and Revisions page - dnr.state.mn.us/waters/watermgmt_section/floodplain/map_appeals.html
• DNR Lake & Flood Elevations Online (LFEO) viewer - arcgis.dnr.state.mn.us/ewr/lfeo/lat/46.4055/lng/-94.2779/z/6
