Environmental Rules in Lehi, UT (2026)
4 verified environmental rules for Lehi, Utah, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Lehi regulates stormwater system design, construction, illicit discharges and inspections citywide under a dedicated 2018 ordinance built to satisfy NPDES/UPDES permit requirements. First offenses are class C misdemeanors, second offenses class B, plus civil penalties and cost recovery.
Lehi Stormwater Management Ordinance
Significant RestrictionsLehi City Code § 9-3-3.C.1
Design of storm drain systems within City boundaries and that discharge into a Lehi City storm drain system requires direct supervision of a Utah registered professional engineer, and shall carry the seal of the same supervising professional engineer. Site designs shall control the peak flow rates of stormwater discharge.
Erosion Control
Lehi requires a grading permit before disturbing more than one acre of land or moving more than two feet of fill or cut, and every permit application must map erosion and sedimentation control devices such as sediment fences and basins built before land-disturbing work begins.
Lehi Erosion & Sediment Control (Grading)
Some RestrictionsLehi City Development Code § 12-B.040.L
A map of the subject area showing the location and type of erosion and sedimentation control devices. Some erosion is unavoidable. The resulting sediment must be trapped on the site, even during design flood conditions. Construct sediment fences and sediment traps and basins before other land-disturbing activities occur. Sediment fences, traps, and basins must be properly maintained, regularly ...
Flood Zones
Lehi requires a Floodplain Development Permit for any construction, fill, or alteration within a FEMA-mapped special flood hazard area. The Stormwater Engineer serves as Floodplain Administrator and reviews every application before work can begin.
Lehi Floodplain Development Permit Rules
Significant RestrictionsLehi City Development Code § 12-D.030
A. Lands to Which This Section Applies. This chapter shall apply to all areas of special flood hazard identified by FEMA within the jurisdiction of Lehi City. ... C. Establishment of Development Permit. A Floodplain Development Permit shall be required to ensure conformance with the provisions of this chapter. ... J. Penalties for Noncompliance. ... No structure or land shall hereafter be const...
Flood Elevation Requirements
New and substantially improved homes in Lehi's mapped flood zones must have their lowest floor, including any basement, elevated at least one foot above the base flood elevation, with a certified elevation submitted to the city.
Lehi Base Flood Elevation Freeboard Rule
Significant RestrictionsLehi City Development Code § 12-D.050.B.1
B.1. Residential Construction for Zones A1-30, A, AE. New construction and substantial improvement of any residential structure shall have the lowest floor (including basement) elevated to one foot above the BFE. If a freeboard option is noted, new construction and substantial improvement shall have the lowest floor (including basement) elevated to the freeboard elevation. A registered professi...
Looking for Utah County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Lehi city rules.
Environmental Rules in Utah County →