Floodplain Management


Map Appeals and Amendments

Letters of Map Amendments

A Letter of Map Amendment (LOMA) is a letter from FEMA confirming that a portion of the map is incorrect. For an individual lot (or multiple lots) where a structure is shown in the flood hazard area on FEMA's floodplain maps and the flowing are valid:

When to pursue a LOMA?

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Eligible for LOMA. The Lowest Adjacent Grade is higher than the Base Flood Elevation.

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Eligible for LOMA, even if the structure has a basement, if the Lowest Adjacent Grade (LAG) is higher than the Base Flood Elevation (BFE). Only eligible if no fill has been placed after the first FEMA floodplain map showing that site in a floodplain.

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Not eligible for LOMA. The Lowest Adjacent Grade would be at the lowest support for the deck or stairway. Since the Lowest Adjacent Grade is below the Base Flood Elevation the structure is not eligible. It would be eligible if the deck is removed or detached from the house.

 

Types of Letters of Map Amendments

Traditionally, the application for most LOMAs include a field survey to verify the Lowest Adjacent Grade (LAG) is above the Base Flood Elevation (BFE). However, there are a couple of abbreviated methods which can be utilized depending on the scenario

There is no fee for FEMA to review a LOMA. However, there will likely be costs associated with obtaining the data needed, or for assistance completing the application. If any part of the structure or lot requested to be removed from the FEMA mapped floodplain is in the floodway, a community official will be required to sign a Community Acknowledgement Form.

Letter of Map Revision Based on Fill

A Letter of Map Revision Based on Fill (LOMR-F) is for individual or multiple lots when there has been fill placed to elevate the building or adjacent to the building (after the date of the first FEMA floodplain map showing the structure in a floodplain).

To be eligible for a LOMR-F:

  1. the lowest natural ground touching the building (including decks and stairway supports) is above the base flood elevation (BFE) and
  2. the lowest floor (including basement or crawl space) is above the base flood elevation (BFE).

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There is a $425 fee for FEMA to review the LOMR-F application. This is in addition to any costs associated with obtaining the data needed, or for assistance completing the application packet.

Conditional Letter of Map Revision based on Fill

A Conditional Letter of Map Revision based on Fill (CLOMR-F) is used to show that a proposed structure that is to be elevated on fill would not be inundated by the 100-year flood if fill is placed on the parcel as proposed or the structure is built as proposed.

Apply for a LOMA or LOMR-F

Paper

Online

Resources