Wyoming SWPPP inspection requirements
- Rain trigger
- 0.5″ storm event
- Post-rain deadline
- Within 24 hours
- Routine inspections
- Every 7 or 14 days
- Permit
- WYR10 Large Construction General Permit
- Agency
- Wyoming Department of Environmental Quality (WY DEQ)
Verify against your permit. These values reflect the most common reading of Wyoming's program; permits change and projects vary. The official permit text from WY DEQ controls.
How Wyoming handles construction stormwater
Construction sites in Wyoming disturbing one acre or more need coverage under the WYR10 Large Construction General Permit, administered by Wyoming Department of Environmental Quality.
Inspector qualifications
A qualified person designated by the operator. Check the current state permit for certification requirements.
Official sources
Common questions
What triggers a SWPPP inspection in Wyoming?
Under the WYR10 Large Construction General Permit, a storm event of 0.5 inches or more triggers a post-storm inspection, generally due within 24 hours (non-work days typically extend to the next work day; check your permit). Routine inspections run every 7 or 14 days.
Who can perform SWPPP inspections in Wyoming?
A qualified person designated by the operator. Check the current state permit for certification requirements.
Who administers the construction stormwater program in Wyoming?
Wyoming Department of Environmental Quality (WY DEQ) administers the NPDES construction stormwater program in Wyoming under the WYR10 Large Construction General Permit.
What are the penalties for SWPPP violations in Wyoming?
Federal Clean Water Act civil penalties can reach $68,445 per day per violation, and WY DEQ can issue administrative orders and state penalties on top. Missing rain-triggered inspections is among the most commonly cited violations in stormwater audits.
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