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Conditional Letter of Map Revision

Responsible Agency: 
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.
Activity that modifies the floodway by causing any increase in the base flood discharge in regulatory floodways, or more than one foot increase in any portion of a Special Flood Hazard Area if no regulatory floodway is designated.
Statute or Regulations: 
44 CFR 60.3; 44 CFR 65.7