Wyoming Statewide Rule
Wyoming Erosion and Sediment Control Permit Requirements
Key Facts
- Threshold
- 1 acre disturbance
- Required Document
- Site SWPPP
- Common BMPs
- Silt fence, basins
- Inspection Frequency
- Weekly typical
- Lead Agency
- Wyoming DEQ
Summary
Wyoming requires erosion and sediment controls on construction sites under WYPDES Construction General Permits issued by DEQ. These statewide standards apply to qualifying sites regardless of city or county boundaries.
35-11-301. Prohibited acts. (a) No person, except when authorized by a permit issued pursuant to the provisions of this act, shall: (i) Cause, threaten or allow the discharge of any pollution or wastes into the waters of the state; (ii) Alter the physical, chemical, radiological, biological or bacteriological properties of any waters of the state;
Full Breakdown
Wyoming DEQ's Construction General Permit, authorized by W.S. 35-11-301 and the federal Clean Water Act, requires operators of sites disturbing one or more acres to install erosion and sediment best management practices including silt fences, stabilized construction entrances, sediment basins, and seeding. Operators must prepare a SWPPP, conduct routine inspections, and submit Notices of Termination once final stabilization is achieved. Linear utility projects and oil and gas pads have specific BMP guidance. While conservation districts may consult on plans, DEQ retains primary enforcement authority. Local grading ordinances may add stricter controls but cannot weaken the state floor.
Violations & Penalties
Failure to implement BMPs or maintain a SWPPP can result in DEQ Notices of Violation, daily civil penalties up to $10,000, and stop-work orders.
Frequently Asked Questions
Are silt fences mandatory on Wyoming construction sites?
Do Wyoming counties enforce erosion control?
Sources
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