Text Size

loma-banner

Flood Map Changes

Digital Flood Insurance Rate Maps (DFIRMs) are based on the best hydrological, hydraulic, topographic, and meteorological and survey information and engineering modeling available at the time of creating the maps. However, no map is perfect and no flooding situation is static. As better, more accurate site specific data becomes available, there may be technical justification that warrants a revision to the currently FEMA-approved (Effective) DFIRM.  If a property owner believes that his/her property was mapped incorrectly by FEMA, they have the opportunity to retain the services of a California-licensed civil engineer or land surveyor and produce technical data and undertake the necessary engineering analyses  to prove their case.  The supporting document that is created is called an application for a “Letter of Map Change” (LOMC).

Some LOMC applications are reviewed and signed by the County before the property owner forwards it to FEMA for its approval. There are several different types of LOMC that property owners can apply for depending on their particular situation. These are as follows:

TYPEDESCRIPTION
CLOMA A Conditional Letter of Map Amendment (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. The letter becomes effective on the date sent. This letter does not revise an effective NFIP map, but 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 (LOMA).
CLOMR A Conditional Letter of Map Revision (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 (BFE). 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 Special Flood Hazard Area (SFHA) by FEMA if later submitted as a request for a Letter of Map Revision (LOMR).
CLOMR-F A Conditional Letter of Map Revision Based on Fill (CLOMR-F) is FEMA's comment on whether a proposed project involving the placement of fill would exclude an area from the SFHA shown on the NFIP map. The letter becomes effective on the date sent. This letter does not revise an effective NFIP map, but 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 (LOMR-F).
LOMA A Letter of Map Amendment (LOMA) is an official amendment, by letter, to an effective NFIP map. A LOMA establishes a property's location in relation to the SFHA. The letter becomes effective on the date sent.
LOMR A Letter of Map Revision (LOMR) is an official revision, by letter, to an effective NFIP map. A LOMR may change flood insurance risk zones, floodplain and/or floodway boundary delineations, planimetric features, and/or BFE. The letter becomes effective on the date sent.
LOMR-F A Letter of Map Revision Based on Fill (LOMR-F) is an official revision, by letter, to an effective NFIP map. A LOMR-F provides FEMA's determination concerning whether a structure or parcel has been elevated on fill above the BFE and excluded from the SFHA. The letter becomes effective on the date sent.

To learn more about how to apply for a Letter of Map Change, visit:

http://www.fema.gov/letter-map-changes

You will receive an official response in writing from FEMA notifying you and the County of Ventura if FEMA has approved or denied your application for a LOMC. If your LOMC is approved, FEMA will also notify you and the County that it has officially amended or revised certain flood elevations and/or boundaries of the Special Flood Hazard Area on the Effective DFIRM for your property.

To view the Letters of Map Change pertinent to the unincorporated Ventura County, visit:

Ventura County Letter of Map Change Viewer

800 S Victoria, Ventura, C.A. 93003
Ventura County Watershed Protection District
Watershed Protection: (805) 654-2001