In almost all of theĭFIRMs, the ZONE field will read: 0.2 PCT ANNUAL CHANCE FLOODPLAIN or something like that, and in some DFIRMs it The link above, Shaded X represents the 0.2% annual chance floodplain (the 500-year flood). One thing to keep in mind with the zone designations is the difference between "Shaded X" and "Unshaded X".
#Fema flood zone map 78747 archive#
The DFIRM database is a subset of theĭigital Flood Insurance Study (FIS) database that serves to archive the information collected during the FIS.įlood Zone information can be found at the FEMA Map Service Center The Digital Flood Insurance rate Map (DFIRM) Database presents the flood risk information depicted on the FIRM inĪ digital format suitable for use in electronic mapping applications. Zones shown on the FIRMs and are the basis for the establishment of premium rates for flood coverage offered Special Flood Hazard Areas (SFHAs) identified on the map are the risk The Flood Disaster Protection Act of 1973. Land facilities located or to be located in identified areas having special flood hazards," Section 2 (b) (4) of Or by Federally supervised, regulated or insured agencies or institutions in the acquisition or improvement of requires the purchase of flood insurance by property owners who are being assisted by Federal programs Insurance applications include enforcement of the mandatory purchase requirement of the Flood Disaster Protection Act, FIRMs are the basis forįloodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP). This layer was created using criteria as defined by the Flood Insurance Rate Maps (FIRM) and produced by theįederal Emergency Management Agency (FEMA). Mandatory purchase of flood insurance applies. The 1-percent-annual-chance floodplain (or SFHA) is the area where the National Flood Insurance Program's (NFIP's)įloodplain management regulations must be enforced through flood hazard building codes and the area where the Referred to as the base flood or 100-year flood and the SFHA is commonly referred to as the "100-year floodplain.” The 1-percent annual chance flood is also Will reach or surpass a base flood elevation in any given year. In these areas there is a 1-percent annual chance that flood waters Utah that are at a higher risk of flooding. Mapped floodplains or “Special Flood Hazard Areas (SFHA’s)” represent areas in The specifications for the horizontal control of DFIRM data files areĬonsistent with those required for mapping at a scale of 1:12000.Īnywhere it rains it can flood. Using the UTM projection and coordinate system. The file is georeferenced to earth's surface
The FISs andįIRMs are published by the Federal Emergency Management Agency (FEMA). TheĭFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs),įlood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The primary risk classifications used are theġ-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. Information and supporting data used to develop the risk information.
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