FEMA flood zone rules in Summit County, UT β also called floodplain regulations or special flood hazard area (SFHA) rules β determine flood insurance requirements and elevation standards for new construction.
Summit County, Utah regulates floodplain development under Title 12 (Flood Control) of the Summit County Code, which establishes a Floodplain Development Permit requirement for any construction or development within a designated Area of Special Flood Hazard. The County participates in the National Flood Insurance Program (NFIP), and flood hazard areas are mapped by FEMA on Flood Insurance Rate Maps (FIRMs) along the Weber River, Provo River headwaters, and tributary creeks subject to mountain snowmelt and runoff. Title 12 Chapter 3 designates a Floodplain Administrator who reviews permits, requires base flood elevation data, and enforces compliance under federal NFIP minimum standards (44 CFR 60.3) and Utah Administrative Code requirements administered by the Utah Division of Emergency Management.
Floodplain regulation in unincorporated Summit County is governed by Title 12 (Flood Control) of the Summit County Code. Title 12 Chapter 2 establishes the general provisions and statement of compliance: under Section 12-2-3, no structure or land may be constructed, located, extended, converted, or altered without full compliance with the terms of Title 12 and other applicable regulations, and a Floodplain Development Permit must be obtained before any construction or development begins within any Area of Special Flood Hazard established by the FEMA Flood Insurance Study and accompanying FIRMs adopted in Section 12-2-2. Title 12 Chapter 3 (Administration) sets out the framework for the Floodplain Administrator and permitting process, including Section 12-3-1 (Designation of Administrator), Section 12-3-2 (Floodplain Development Permit), Section 12-3-3 (Duties and Responsibilities of Administrator), Section 12-3-4 (Permit Procedures), and Section 12-3-5 (Appeal and Variance Procedures). Under Section 12-3-2, applications for a Floodplain Development Permit must include a site plan drawn to scale showing location, dimensions, and elevation of proposed alterations, existing and proposed structures, and the location in relation to areas of special flood hazard, including horizontal boundaries and base flood elevation. Applicants must provide base flood elevation data for the proposed development area, the elevation in relation to mean sea level of the lowest floor (including basement) of all structures, the elevation to which any structure has been or will be floodproofed, and certification by a licensed professional engineer or architect that floodproofing methods used for any nonresidential structure meet the floodproofing criteria of Title 12. Approval or denial of a permit is based on factors including the danger to life and property due to flooding or erosion damage, the susceptibility of the proposed facility and its contents to flood damage, the danger that materials may be swept onto other lands, the compatibility of the proposed use with existing development, and the safety of access to the property in times of flood for ordinary and emergency vehicles. Summit County is a participating community in the National Flood Insurance Program; Special Flood Hazard Areas in the unincorporated county and incorporated municipalities (Coalville, Francis, Henefer, Kamas, Oakley, Park City) are mapped by FEMA on the effective FIRM panels available at the FEMA Map Service Center (msc.fema.gov). Major flood sources in Summit County include the Weber River and its tributaries flowing west toward the Wasatch Front, the headwaters of the Provo River draining the south slope of the Uinta Mountains, and Chalk Creek, Silver Creek, and other mountain streams subject to spring snowmelt and high-elevation runoff. The Utah Division of Emergency Management's Floodplain Mapping Program (the Cooperating Technical Partner with FEMA) maintains state-level mapping resources at floodhazards.utah.gov, and the Utah Geospatial Resource Center publishes flood-area data at gis.utah.gov. Property owners who believe a structure is mistakenly mapped within an SFHA may apply to FEMA for a Letter of Map Amendment (LOMA) or Letter of Map Revision (LOMR). Sandbags and emergency flood response in unincorporated areas are coordinated by Summit County Public Works at (435) 336-3200; residents inside Coalville, Francis, Henefer, Kamas, Oakley, or Park City should contact their respective city public works departments.
Construction, fill, grading, excavation, placement of structures, manufactured homes, or substantial improvement within an Area of Special Flood Hazard in unincorporated Summit County without an approved Floodplain Development Permit is a violation of Title 12 of the Summit County Code, including Sections 12-2-3 (Compliance) and 12-3-2 (Floodplain Development Permit). The Floodplain Administrator may deny or revoke permits, require corrective elevation, removal, or restoration of unpermitted work, and refer matters for civil and criminal enforcement under the County's general code enforcement powers. Persistent non-compliance also exposes the community to NFIP probation or suspension by FEMA, which would eliminate access to subsidized federal flood insurance for property owners countywide. Federally backed mortgages on structures within a mapped SFHA require flood insurance under the National Flood Insurance Act; lapses can trigger lender force-placed coverage at higher cost. Failure to provide required certifications by a licensed professional engineer or architect for floodproofing of nonresidential structures, or failure to meet base flood elevation requirements for the lowest floor of new construction or substantial improvements, is independently grounds for permit denial.
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