Weber County, UT Environmental Rules: Erosion Control (2026)

Any excavation, grubbing, grading, or other construction activity that disrupts the natural landscape on unincorporated county land triggers Weber County's stormwater construction activity permit under Code § 40-3-2. The permit is mandatory once a project disturbs more than 5,000 square feet of land surface, moves more than 200 cubic yards of cut or fill, or requires a building permit involving excavation on a parcel under five acres. Projects of five acres or larger fall instead under a state Division of Water Quality permit. Applicants file with the county engineering department, submitting a stormwater pollution prevention plan meeting the content standards of § 40-3-4 before or with their subdivision plat, site plan, building permit, or land use permit application (§ 40-3-3).

The storm sewer utility manager reviews and approves, conditions, or denies the plan. Under § 40-3-4, the plan must describe site conditions, list best management practices such as silt fence, sediment traps, gravel construction entrances, and inlet protection, and commit to stabilizing any disturbed area within 14 days after grading work stops there, longer only if snow or frozen ground prevents seeding or if work resumes within 21 days. Section 40-3-5 requires the permittee to install those measures before construction begins and maintain them until the county accepts a notice of termination.

County engineering staff, the state water quality division, and EPA representatives may inspect the site at any time under § 40-3-6. A permit can be revoked or suspended on ten to 30 days' notice for noncompliance (§ 40-3-7), triggering a stop-work order until the plan is corrected and reissued.