The North Carolina Floodplain Mapping Program will use this website for storage and dissemination of various documents for use in education, outreach and various technical uses for floodplain management. The Document Center provides users online tools for searching, filtering, viewing and downloading various types of documents including Letters of Map Change (LOMC), Technical Issue Papers developed by the program, National Flood Insurance Program Information (NFIP), Meeting documentation and information, FAQs as well as regulatory information for preliminary and effective flood studies.
A Letter of Map Revision (LOMR) is FEMA's modification to an effective Flood Insurance Rate Map (FIRM), or Flood Boundary and Floodway Map (FBFM), or both. LOMRs are generally based on the implementation of physical measures that affect the hydrologic or hydraulic characteristics of a flooding source and thus result in the modification of the existing regulatory floodway, the effective Base Flood Elevations (BFEs), or the Special Flood Hazard Area (SFHA). The LOMR officially revises the Flood Insurance Rate Map (FIRM) or Flood Boundary and Floodway Map (FBFM), and sometimes the Flood Insurance Study (FIS) report, and when appropriate, includes a description of the modifications. The LOMR is generally accompanied by an annotated copy of the affected portions of the FIRM, FBFM, or FIS report.
A Conditional Letter of Map Revision (CLOMR) is FEMA's comment on a proposed project that would, upon construction, affect the hydrologic or hydraulic characteristics of a flooding source and thus result in the modification of the existing regulatory floodway, the effective Base Flood Elevations (BFEs), or the Special Flood Hazard Area (SFHA). The letter does not revise an effective NFIP map, it indicates whether the project, if built as proposed, would be recognized by FEMA. FEMA charges a fee for processing a CLOMR to recover the costs associated with the review. Building permits cannot be issued based on a CLOMR, because a CLOMR does not change the NFIP map.
Once a project has been completed, the community must request a revision to the Flood Insurance Rate Map (FIRM) to reflect the project. "As-built" certification and other data must be submitted to support the revision request.
When a community has Zone A areas without elevation and/or floodway data, the community shall obtain, review and reasonably utilize Base Flood Elevation (BFE) and floodway data available from a Federal, State, or other source, including data developed pursuant to paragraph 60.3 (b) (3), as criteria for requiring that new construction, substantial improvement, or other development in Zone A on the community''s Flood Insurance Rate Map (FIRM) or Flood Boundary and Floodway Map (FBFM) meet floodplain management standards. National Flood Insurance Program (NFIP) regulations require that BFE data be included within new subdivision proposals and other proposed developments greater than 5 lots or 50 acres, whichever is the lesser.
When a community has Zone A areas without elevation and/or floodway data, the community shall obtain, review and reasonably utilize Base Flood Elevation (BFE) and floodway data available from a Federal, State, or other source, including data developed pursuant to paragraph 60.3 (b) (3), as criteria for requiring that new construction, substantial improvement, or other development in Zone A on the community''s Flood Insurance Rate Map (FIRM) or Flood Boundary and Floodway Map (FBFM) meet floodplain management standards. National Flood Insurance Program (NFIP) regulations require that BFE data be included within new subdivision proposals and other proposed developments greater than 5 lots or 50 acres, whichever is the lesser.
Once initiated, FEMA will process a request to revise the flood hazard maps based on as-built conditions by one of two methods - Physical Map Revision (PMR) or Letter of Map Revision (LOMR). A PMR is an action whereby one or more map panels are physically revised and republished. A PMR is used to change flood risk zones, floodplain and/or floodway delineations, flood elevations, and/or planimetric features. To ensure that those affected by the PMR have the opportunity to provide input, a PMR has procedures that include a community comment period and a 6-month compliance period to update ordinances while the new maps are printed and distributed. Because of the large amount of flood hazard information that is incorporated into the maps and the number of people that will be affected by that information, a PMR can take as long as 18 months to complete. FEMA charges the requester of a PMR a fee for review of the data submitted in support of certain types of requests such as those concerning structural measures. PMRs must be requested by the Chief Executive Officer (CEO) of the community because the community is responsible for adoption of the revised flood hazard information into their specific floodplain management ordinances and regulations.
A Letter of Map Revision (LOMR) is FEMA's modification to an effective Flood Insurance Rate Map (FIRM), or Flood Boundary and Floodway Map (FBFM), or both. LOMRs are generally based on the implementation of physical measures that affect the hydrologic or hydraulic characteristics of a flooding source and thus result in the modification of the existing regulatory floodway, the effective Base Flood Elevations (BFEs), or the Special Flood Hazard Area (SFHA). The LOMR officially revises the Flood Insurance Rate Map (FIRM) or Flood Boundary and Floodway Map (FBFM), and sometimes the Flood Insurance Study (FIS) report, and when appropriate, includes a description of the modifications. The LOMR is generally accompanied by an annotated copy of the affected portions of the FIRM, FBFM, or FIS report.
A Conditional Letter of Map Revision (CLOMR) is FEMA's comment on a proposed project that would, upon construction, affect the hydrologic or hydraulic characteristics of a flooding source and thus result in the modification of the existing regulatory floodway, the effective Base Flood Elevations (BFEs), or the Special Flood Hazard Area (SFHA). The letter does not revise an effective NFIP map, it indicates whether the project, if built as proposed, would be recognized by FEMA. FEMA charges a fee for processing a CLOMR to recover the costs associated with the review. Building permits cannot be issued based on a CLOMR, because a CLOMR does not change the NFIP map.
Once a project has been completed, the community must request a revision to the Flood Insurance Rate Map (FIRM) to reflect the project. "As-built" certification and other data must be submitted to support the revision request.
When a community has Zone A areas without elevation and/or floodway data, the community shall obtain, review and reasonably utilize Base Flood Elevation (BFE) and floodway data available from a Federal, State, or other source, including data developed pursuant to paragraph 60.3 (b) (3), as criteria for requiring that new construction, substantial improvement, or other development in Zone A on the community''s Flood Insurance Rate Map (FIRM) or Flood Boundary and Floodway Map (FBFM) meet floodplain management standards. National Flood Insurance Program (NFIP) regulations require that BFE data be included within new subdivision proposals and other proposed developments greater than 5 lots or 50 acres, whichever is the lesser.
When a community has Zone A areas without elevation and/or floodway data, the community shall obtain, review and reasonably utilize Base Flood Elevation (BFE) and floodway data available from a Federal, State, or other source, including data developed pursuant to paragraph 60.3 (b) (3), as criteria for requiring that new construction, substantial improvement, or other development in Zone A on the community''s Flood Insurance Rate Map (FIRM) or Flood Boundary and Floodway Map (FBFM) meet floodplain management standards. National Flood Insurance Program (NFIP) regulations require that BFE data be included within new subdivision proposals and other proposed developments greater than 5 lots or 50 acres, whichever is the lesser.
Once initiated, FEMA will process a request to revise the flood hazard maps based on as-built conditions by one of two methods - Physical Map Revision (PMR) or Letter of Map Revision (LOMR). A PMR is an action whereby one or more map panels are physically revised and republished. A PMR is used to change flood risk zones, floodplain and/or floodway delineations, flood elevations, and/or planimetric features. To ensure that those affected by the PMR have the opportunity to provide input, a PMR has procedures that include a community comment period and a 6-month compliance period to update ordinances while the new maps are printed and distributed. Because of the large amount of flood hazard information that is incorporated into the maps and the number of people that will be affected by that information, a PMR can take as long as 18 months to complete. FEMA charges the requester of a PMR a fee for review of the data submitted in support of certain types of requests such as those concerning structural measures. PMRs must be requested by the Chief Executive Officer (CEO) of the community because the community is responsible for adoption of the revised flood hazard information into their specific floodplain management ordinances and regulations.