The Natural Resources Conservation Service (NRCS) funds flood mitigation projects annually through its Emergency Watershed Protection Program. Community visits by the State’s Floodplain Manager throughout the year help to ensure ordinances are being implemented and flood risks are being mitigated. Utah DEM and FEMA provide NFIP trainings to help prepare floodplain administrators to pass the Certified Floodplain Manager exam. FEMA sets a basic standard of regulations for communities participating in the NFIP, but NFIP ordinances and regulations are handled at the community level. Utah floodplain laws were drafted in partnership with national, state and local building codes. Only 25 properties in Utah are repetitive losses and local jurisdictions are tasked with monitoring and remediating those properties. Box Elder County reported they have 64 critical facilities at risk to flooding, the highest in the state. Iron County reported the highest number of commercial units vulnerable to flooding at 345, while Salt Lake had the highest valuation of buildings and four other counties had valuations over a million dollars. Washington County reported the highest residential units at risk for floods and Box Elder, Cache, Iron, Salt Lake, and Tooele all reported over a million dollars in residential units at risk to flood hazards. Salt Lake, Tooele, Cache, Davis and Weber counties reported the most people at risk of flooding. Grant, Iron, Garfield, Washington and Kane counties ranked themselves as having the highest flood risk in the state. In Utah, each local government assesses their own flood vulnerability and calculates their potential losses in a flood event relative to people, residential units, commercial units, and critical facilities. Alluvial fan flooding is characterized by high-velocity flows. Riverine or fluvial flooding is the most common and occurs when a river exceeds its capacity and overflows its banks gradually or in a flash flood event. Floodways encompass stream channels and the adjacent floodplain that must remain clear to permit the passage of water.
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