Letters of Map Revision and Conditional Letters of Map Revision

English

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.

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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.

Online

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

Mailed Submittals

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.

State	Address	Instruction	Email
Alabama	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.
Colorado	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	Colorado Water Conservation Board Attn: Floodplain Mapping Program Manager 1313 Sherman Street Room 718 Denver, Colorado 80203	Requests for other areas of Colorado are to be mailed to the Colorado Water Conservation Board.
Illinois	By mail: 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	Indiana Department of Natural Resources Division of Water 402 W. Washington Street, Room W264 Indianapolis, Indiana 46204-2243 Attn: LOMR Manager	All request 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.
Kentucky	Kentucky Division of Water 300 Sewer Boulevard Frankfort, Kentucky 40601 Attn: LOMR Manager	All requests within the state are to be submitted to the Kentucky Division of Water.	These requests can also be emailed to LOMR.KYHelp@ky.gov.
North Carolina	Charlotte-Mecklenburg County Storm Water Services Engineering & Mitigation Program Attn: Mathew C. Hornack, 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	North Carolina Emergency Management Risk 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.
Texas	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.
Texas	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.
Texas	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.