Under NC environmental regulations, which activity requires a Sedimentation and Erosion Control permit?
Correct Answer
C) Disturbing one or more acres of land
NC environmental regulations require Sedimentation and Erosion Control permits for any land-disturbing activity of one acre or more.
Why This Is the Correct Answer
The NC Sedimentation Pollution Control Act requires a Sedimentation and Erosion Control plan (effectively a permit) for any land-disturbing activity that disturbs one or more acres of land. This acreage-based threshold is the standard trigger for permit requirements.
Why the Other Options Are Wrong
Option A: Any construction project over $100,000
Project cost over $100,000 is not a trigger for sedimentation and erosion control permits. NC uses land disturbance area (acreage) as the criterion, not project dollar value. A small excavation project costing $200,000 may not require a permit if it disturbs less than an acre.
Option B: Any excavation over 500 cubic yards
Volume of excavation (500 cubic yards) is not the regulatory threshold. NC regulations focus on the surface area disturbed, not the volume of material moved. A deep but compact excavation might disturb little surface area.
Option D: Projects within 100 feet of waterways
Proximity to waterways (within 100 feet) triggers riparian buffer rules and stream buffer regulations, not the sedimentation and erosion control permit requirement. The permit threshold is based on disturbed acreage, not distance from a water body.
Memory Technique
One Acre = One Permit. Think of a football field (roughly one acre) — if your project disturbs an area the size of a football field, you need the permit. Keep it simple: '1 acre = 1 permit.'
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