NEW Options for Letters of Map Amendments (LOMAs) & Letters of Map Revision Based on Fill (LOMR-Fs) as of December 2012

Streamlined Letter of Map Amendment (LOMA) Using LiDAR Elevation Data

This abbreviated LOMA application process is intended for locations where it is clear that the entire building (or the entire lot) is above the base flood elevation (BFE) based on review of the LiDAR derived contour elevations compared to the base flood elevation.

What is LiDAR?

"Light Detection and Ranging" is an active remote sensing technology that uses laser light to detect and measure surface features on the earth. LiDAR-derived high-resolution elevation data products are available for many areas of Minnesota.

Documents for Streamlined LOMA Process Using LiDAR elevation data:

  1. Streamlined checklist pdf of information needed for a LOMA using the 2-foot contours from LiDAR
  2. Attachment for checklist pdf that shows when the 2-foot contours may be used in lieu of a field survey
  3. Certifications for LiDAR:

Online application for LOMAs & LOMR-Fs

Submit the same information as in the regular LOMA or LOMR-F process, but submit electronically instead of mailing.

Letter of Map Amendment (LOMA)

For an individual lot (or multiple lots) where a structure or lot is shown "in" the flood hazard area (Zone A, AE, AO, AH) on FEMA's floodplain maps and the following are valid:

  • Either:
    1. Better elevation information shows the structure is higher than the Base Flood Elevation (BFE), or 1% annual chance flood elevation (aka "100-year flood" elevation), or
    2. A better aerial photo or other information shows the structure is not actually "in" the high flood hazard area. These types of LOMAs are called LOMA-out as shown or LOMA-OAS.
  • No fill has been placed to elevate the building or adjacent to the building (after the date of the first FEMA floodplain map that showed that structure or lot in a FEMA mapped high flood hazard area).
  • IF any part of the structure or lot to be removed is in the floodway, a community official will be required to sign a "Community Acknowledgement Form"
  • LOMA Fees: There is no fee for FEMA to review the LOMA. However, there will likely be costs associated with obtaining the data needed, or for assistance completing the application packet.

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

For an individual lot (or multiple lots) where a structure or lot is shown "in" the flood hazard area (Zone A, AE, AO, AH) on FEMA's floodplain maps and the following are valid:

  • The applicant has elevation data that show the lowest floor of the structure (including basement or crawl space) is higher than the Base Flood Elevation (BFE), i.e., the 1% annual chance flood elevation (aka "100-year flood" elevation)
  • The applicant has elevation data that show the lowest adjacent grade (lowest place the ground touches the building) is higher than the Base Flood Elevation (BFE), i.e., the 1% annual chance flood elevation (aka "100-year flood" elevation)
  • 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.