Such cases are referred to as "inadvertent inclusions." These island areas may appear relatively small on the FIRM and are sometimes included in the 100-year floodplain by nationwide floodplain map determination companies that prepare floodplain designations on behalf of the mortgage industry. But, because of limitations of scale or topographic definition on the source maps, there may be elevated areas or "islands" that are not actually in the new regulatory floodplain shown on the maps. This area has a 1% or greater chance of flooding in any given year.įEMA uses the most accurate flood hazard information available and applies rigorous standards while developing FIRMs. One of the areas shown on a FIRM is a Special Flood Hazard Area (SFHA), or the 100-year floodplain. The Flood Insurance Rate Map (FIRM) identifies areas in a community that are subject to flooding and shows the associated risks. Letters of Map Revision Based on Fill (LOMRFs).Conditional Letters of Map Revision based on Fill (CLOMRFs).Conditional Letters of Map Revision (CLOMRs).Flood Insurance Rate Maps (FIRMs) or Digital Flood Insurance Rate Maps (DFRIMs) Ĭonditional Letters of Map Amendment (CLOMAs):.Floodplain maps are periodically updated and revised to reflect changing conditions, such as impacts of flooding, new topography, land development, updated mapping studies, and construction of floodplain improvements.įloodplain map changes can take several forms:
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