A LOMR is a letter from FEMA officially revising the current NFIP map to show changes to floodplains, regulatory floodways, or flood elevations. Reference Code of Federal Regulations Title 44 Parts 60, 65, and 72. A community or individual can request a LOMR to update the following:
- Flood Hazard Boundary Map
- Flood Insurance Rate Map
- Flood Boundary and Floodway Map
- Flood Insurance Study Report
A CLOMR is a letter from FEMA commenting on whether a proposed project, if built as proposed, or proposed hydrology changes would meet minimum National Flood Insurance Program standards.
Endangered Species Act requirements for CLOMRs
MT-2 Forms and Instructions
When completing these forms, the requester provides the pertinent data about this request to FEMA. The content of the forms also ensure:
- data and methodology are based on current conditions
- qualified professionals have assembled data and performed necessary computations
- individuals and organizations affected by proposed changes are aware of the changes and have an opportunity to comment.
For additional information about MT-2s requirements and general FEMA guidelines, refer to the documents below.
FEMA Guidelines and Standards for Flood Risk Analysis and Mapping
MT-2 Requests may be submitted via mail or online. Online submittals offer a reduced review and processing fee.
FEMA recommends an applicant use the Online Letter of Map Change tool to submit a revision using the Online Letter of Map Change tool.
Submit Your Request
For hardcopy (paper) submittals, the completed package should be submitted to the appropriate address indicated below.
Letter of Map Change Clearinghouse
3601 Eisenhower Avenue, Suite 500
Alexandria, VA 22304-6426
Exception: In Cooperating Technical Partner (CTP) agreements with FEMA, the following counties or states will review and process Letters of Map Revisions and Conditional Letters of Map Revisions: Alabama, Colorado, Illinois, Indiana, North Carolina and Texas. These states have different mail-in information.
Alabama Offices of Water Resources
Attn: MT-2 Letter of Map Change Coordinator
401 Adams Avenue
Montgomery, Alabama 36104
|All requests within the state are mailed to this address.
|Mile High Flood District
Attn: Floodplain Manager
2480 West 26th Avenue, Suite 156-B
Denver, Colorado 80211
|All requests within the jurisdiction of the Mile High Flood District in Colorado.
Colorado Water Conservation Board
Attn: Floodplain Mapping Program Manager
1313 Sherman Street
Denver, Colorado 80203
|Requests for other areas of Colorado are to be mailed to the Colorado Water Conservation Board.
Illinois State Water Survey
Attn: Chris Hanstad
2204 Griffith Drive
Champaign, Illinois 61820-7463
|All requests within the state are to be submitted to the Illinois State Water Survey.
|These requests can also be emailed to MT2@ISWS.Illinois.edu.
|Indiana Department of Natural Resources
Division of Water
402 W. Washington Street, Room W264
Indianapolis, Indiana 46204-2243
Attn: LOMR Manager
|Beginning end of April 2022, all requests for CLOMRs and LOMRs in Indiana should be mailed to the Indiana Department of Natural Resources
|These requests can also be emailed to Water_inquiry@dnr.IN.gov.
|Charlotte-Mecklenburg County Storm Water Services Engineering & Mitigation Program
Attn: Salih W. Iddrisu, P.E., CFM, Project Manager
2145 Suttle Avenue
Charlotte, North Carolina 28208
|All requests within the City of Charlotte and Mecklenburg County are to be mailed to the Charlotte-Mecklenburg Storm Water Services.
|North Carolina Emergency Management
NC MT-2 LOMC Depot
Attention: Scott Gentry
4218 Mail Service Center
Raleigh, North Carolina 27699-4218
|Requests for all other areas in North Carolina are mailed here.
Harris County Flood Control District
Attn: MT-2 Letter of Map Revisions Coordinator
9900 Northwest Freeway
Houston, Texas 77092
|All requests within Harris County are to be mailed to the Harris County Flood Control District.
|San Antonio River Authority
Attn: Ecological Engineering Department, LOMC Administrator
100 East Guenther Street
San Antonio, Texas 78204
|All requests within Bexar, Goliad, Karnes and Wilson counties are to be mailed to the San Antonio River Authority.
|Letter of Map Change Clearinghouse
3061 Eisenhower Avenue, Suite 500
Alexandria, Virginia 22304-6426
|All of the other areas of Texas are to be mailed to Alexandria, Virginia.