Lehi, UT Environmental Rules: Erosion Control (2026)
Key Facts
- Permit trigger
- over 1 acre disturbed or 2+ ft grade change
- Control devices
- sediment fences/basins before disturbance
- Stormwater filing
- SWPPP plus Utah DWQ Notice of Intent
- Late/no-permit fine
- $500 minimum per day
- Permit term
- 1 year, extendable under §10.120
- Issuing office
- Public Works Director
Summary
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.
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 inspected, and cleaned as necessary.
Full Breakdown
Development Code Chapter 12-B governs grading, filling and excavation. A grading permit is required for any grading, clearing or grubbing exceeding one acre (43,560 square feet), any fill or excavation changing elevation more than two feet from adjacent properties, or retaining walls over four feet tall (Section 12-B.020.A). The Public Works Director issues permits subject to conditions requiring the smallest practicable disturbed area, retention of natural vegetation where feasible, and prompt stabilization of disturbed soil (Section 12-B.030). Submittal requirements under Section 12-B.040 include a re-vegetation plan with at least six inches of topsoil and native seed mix on all disturbed surfaces before final city acceptance (12-B.040.B.2), and, critically, 'a map of the subject area showing the location and type of erosion and sedimentation control devices,' with sediment fences, traps and basins constructed 'before other land-disturbing activities occur' and 'properly maintained, regularly inspected, and cleaned as necessary' (Section 12-B.040.L).
Applicants must also submit a current Storm Water Pollution Prevention Plan (SWPPP) and a Utah State Notice of Intent (NOI), maintained for the life of the permit (Section 12-B.040.Q). Grading near waterways additionally requires a Stream Alteration Permit from the Utah Division of Water Rights (Section 12-B.040.R). A grading permit cannot run longer than one year without an extension under Development Code Section 10.120. Public utility, park and road projects, cemetery graves, and routine landscape maintenance of already-established landscaping are exempt (Section 12-B.020.B), but an exemption from the grading permit does not excuse compliance with any other applicable city code (Section 12-B.020.C).
Violations & Fines
Work not performed in compliance with the SWPPP plan is a grading permit violation (Section 12-B.080.G), as is grading outside the approved surveyed area, removal of survey stakes, or hauling off approved routes. Grading without a valid permit or after a permit expires draws a minimum daily fine of $500 per day (Section 12-B.090.D), and repeated out-of-bounds grading triggers escalating stop-work orders, a 30-day grading ban, and eventual permit revocation requiring a new permit fee and bond (Section 12-B.090.A). Violations may also be charged as a misdemeanor under Section 34.010 (Section 12-B.090.E).
Frequently Asked Questions
When does Lehi require a grading permit for erosion control?
What erosion control measures does Lehi require on a permitted grading site?
Does Lehi require a stormwater plan in addition to erosion controls?
What happens if grading occurs without a permit in Lehi?
Sources & Official References
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Erosion Control in Nearby Cities
How other cities in Utah County handle erosion control.