South Dakota SWPPP inspection requirements
- Rain trigger
- 0.5″ storm event
- Post-rain deadline
- Within 24 hours
- Routine inspections
- Every 7 or 14 days
- Permit
- SDR10 Construction General Permit
- Agency
- South Dakota Department of Agriculture and Natural Resources (DANR)
Verify against your permit. These values reflect the most common reading of South Dakota's program; permits change and projects vary. The official permit text from DANR controls.
How South Dakota handles construction stormwater
Construction sites in South Dakota disturbing one acre or more need coverage under the SDR10 Construction General Permit, administered by South Dakota Department of Agriculture and Natural Resources.
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 South Dakota?
Under the SDR10 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 South Dakota?
A qualified person designated by the operator. Check the current state permit for certification requirements.
Who administers the construction stormwater program in South Dakota?
South Dakota Department of Agriculture and Natural Resources (DANR) administers the NPDES construction stormwater program in South Dakota under the SDR10 Construction General Permit.
What are the penalties for SWPPP violations in South Dakota?
Federal Clean Water Act civil penalties can reach $68,445 per day per violation, and DANR 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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