BMP inspections for construction sites in Greenville County, SC

Greenville County issues more land-disturbing permits than any other county in Upstate South Carolina. Active sites on the Woodruff Road corridor, I-85 interchange development, residential subdivisions in the southern part of the county pushing toward Simpsonville and Mauldin, and ongoing commercial construction throughout the urban core mean a consistent volume of NPDES-permitted work that requires regular BMP inspection documentation.

What the permit requires

Any construction activity disturbing one acre or more in South Carolina requires coverage under the SCDHEC Construction General Permit (CGP) and NPDES permit authorization. The CGP sets the inspection schedule: at least once every seven calendar days during active land disturbance, and within 24 hours of a rainfall event measuring 0.5 inches or greater. The seven-day clock and the rain event trigger run independently: a rain event inspection doesn't reset the weekly schedule.

Inspections are required from initial land disturbance through final stabilization. In Greenville County, final stabilization typically means 70% permanent vegetative cover on all disturbed areas, or pavement and concrete over all disturbed ground. Until that standard is met, the inspection schedule stays active even if grading is complete and building construction has started.

What gets documented

Every BMP on the site needs to be covered in each inspection: silt fence condition along the full perimeter, sediment basins and traps (levels, outlet conditions, any overtopping), inlet protection devices at drop and curb inlets, stabilized construction entrance condition, diversion berms and slope drains, erosion control blankets and seeding progress, and any areas of active erosion or BMP failure.

The inspection record needs to include the date and time of inspection, weather conditions at the time, findings at each BMP location, and any corrective action taken or scheduled. Records go into the SWPPP and stay on file for at least three years. SCDHEC inspectors check that inspection records match the current site condition and are being maintained on schedule.

Greenville County enforcement context

SCDHEC inspects construction sites in Greenville County on a regular basis, and the county itself has a stormwater program that conducts independent site checks. A site without a complete, dated inspection record is in violation regardless of the physical condition of the BMPs on the ground. The record is what gets checked first.

The most common documentation failure isn't a BMP that failed: it's an inspection record that's missing, incomplete, or doesn't reflect what the site actually looked like on the inspection date. A drone inspection produces a GPS-tagged, timestamped photo record of every BMP location on the date of the flight, which is an independent, verifiable record of site conditions at each inspection.

How drone inspections work on Greenville County sites

A drone covers a 40-acre site in 45 minutes with complete coverage of the site perimeter and interior BMP locations. For GCs with active sites on the Woodruff Road corridor or in the I-85 interchange areas, a weekly or bi-weekly BMP inspection flight fits into the construction schedule without pulling a superintendent for a two-hour ground walk. For consultants managing multiple Greenville County sites, drone coverage expands the number of sites that can be documented on a single inspection day.

Deliverables are GPS-tagged photos organized by BMP type and a written inspection summary, delivered within 48 hours. Formatted for direct insertion into SWPPP inspection logs.

For the full NPDES inspection frequency requirements, see BMP inspection frequency requirements for construction sites in South Carolina.

For SWPPP consultants managing multiple Greenville County sites, see drone inspection support for SWPPP consultants.

FAA Part 107 certified. Insured. Same-week scheduling for Greenville County.