What are the different types of LOMC?

Conditional Letter of Map Amendment (CLOMA)

A CLOMA is FEMA's comment on whether a proposed project would be excluded from the Special Flood Hazard Area (SFHA) shown on the effective National Flood Insurance Program (NFIP) map. There is no appeal period. The letter becomes effective on the date sent. This letter does not revise an effective NFIP map, it indicates whether the project, if built as proposed, would or would not be removed from the SFHA by FEMA if later submitted as a request for a Letter of Map Amendment.

Conditional Letter of Map Revision (CLOMR)

A CLOMR is FEMA's comment on a proposed project that would affect the hydrologic and/or hydraulic characteristics of a flooding source and thus result in the modification of the existing regulatory floodway or effective Base Flood Elevations. There is no appeal period. The letter becomes effective on the date sent. This letter does not revise an effective National Flood Insurance Program map, it indicates whether the project, if built as proposed, would or would not be removed from the Special Flood Hazard Area by FEMA if later submitted as a request for a Letter of Map Revision.

Conditional Letter of Map Revision Based on Fill (CLOMR-F)

A CLOMR-F is FEMA's comment on whether a proposed project involving the placement of fill would exclude an area from the Special Flood Hazard Area (SFHA) shown on the National Flood Insurance Program (NFIP) map. There is no appeal period. The letter becomes effective on the date sent.

This letter does not revise an effective NFIP map, it indicates whether the project, if built as proposed, would or would not be removed from the SFHA by FEMA if later submitted as a request for a Letter of Map Revision based on Fill.

Letter of Map Amendment (LOMA)

A LOMA is an official amendment, by letter, to an effective National Flood Insurance Program map. A LOMA establishes a property's location in relation to the Special Flood Hazard Area. There is no appeal period. The letter becomes effective on the date sent.

Letter of Map Revision (LOMR)

A LOMR is an official revision, by letter, to an effective National Flood Insurance Program map. A LOMR may change flood insurance risk zones, floodplain and/or floodway boundary delineations, planimetric features, and/or Base Flood Elevations.

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

A LOMR-F is an official revision, by letter, to an effective National Flood Insurance Program map. A LOMR-F provides FEMA's determination concerning whether a structure or parcel has been elevated on fill above the Base Flood Elevation and excluded from the Special Flood Hazard Area. The letter becomes effective on the date sent.

Show All Answers

1. What does FEMA stand for?
2. What is a flood?
3. What is a floodplain?
4. What is the National Flood Insurance Program (NFIP)?
5. How does the National Flood Insurance Program (NFIP) benefit the community?
6. What is the Community Rating System (CRS)?
7. What is a 100-Year Flood Zone or Special Flood Hazard Area (SFHA)?
8. What is a Flood Insurance Rate Map (FIRM)?
9. What is a base flood elevation (BFE)?
10. What are my odds of flooding within a 100-year floodplain?
11. How do I know if I am in a flood zone?
12. My house is in a floodplain - what do I need to know?
13. Who has to buy flood insurance?
14. What is Pre-FIRM and Post-FIRM?
15. What is an Elevation Certificate?
16. Who can prepare an Elevation Certificate?
17. Why should I have an Elevation Certificate for my property?
18. What is a Letter of Map Change (LOMC)?
19. What are the different types of LOMC?
20. How long does it take to obtain a Letter of Map Amendment (LOMA), Letter of Map Revision (LOMR), or physical map revision?
21. My mortgage company has informed me that my house is in a floodplain and that I will be required to purchase flood insurance - what do I need to know?
22. What is floodplain management?
23. Where can I find more information about the Federal Emergency Management Agency (FEMA) and the National Flood Insurance Program (NFIP)?