BMP inspections for construction sites in Spartanburg County, SC

Spartanburg County has the most concentrated industrial and warehouse construction in Upstate South Carolina. Active build along the I-85 corridor between Gaffney and Greer, BMW supplier facilities in the Duncan and Lyman areas, distribution and logistics development around the GSP airport, and commercial growth throughout Spartanburg and Boiling Springs mean a consistent volume of NPDES-permitted construction 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 two inspection triggers that operate independently: inspections must occur at least once every seven calendar days during active land disturbance, and an inspection is required within 24 hours following a rainfall event of 0.5 inches or greater. A rain event inspection doesn't reset the seven-day clock.

Inspections are required from initial land disturbance through final stabilization. On large industrial sites, final stabilization means 70% permanent vegetative cover on all disturbed areas not covered by hard surface. On warehouse and distribution sites with large paved footprints, the vegetative requirement applies to perimeter areas, detention basin banks, and any disturbed ground not under structure or pavement.

What gets documented

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

The inspection record must include the date and time of inspection, weather conditions, findings at each BMP location, and any corrective action taken or scheduled. Records go into the SWPPP and must be maintained on site for at least three years. SCDHEC inspectors check that inspection records are complete, dated, and consistent with current site conditions.

Spartanburg County enforcement context

Industrial and warehouse construction sites in Spartanburg County are subject to the same SCDHEC stormwater enforcement as smaller commercial sites, and large sites with multiple drainage areas and long silt fence runs create more documentation surface area per inspection. A 200,000 square foot warehouse pad with grading on multiple fronts and several thousand feet of perimeter silt fence requires complete documentation of every BMP location at each inspection.

The most common NPDES documentation failure isn't a BMP in poor condition: it's an inspection record that doesn't cover the full site, is missing dates, or doesn't reflect actual site conditions at the time of inspection. A drone inspection produces a GPS-tagged, timestamped aerial record of every BMP location across the full site on the date of the flight, which documents what the site looked like at each inspection independently of the written record.

How drone inspections work on Spartanburg County sites

A drone covers a 40-acre site in 45 minutes and a larger 100-acre industrial pad in under two hours, with complete coverage of the perimeter and all interior BMP locations. For GCs with active sites on the I-85 industrial corridor or the BMW supplier network, a weekly or bi-weekly BMP inspection flight maintains the inspection record without pulling a superintendent for a two-to-three-hour ground walk. For environmental consultants managing multiple Spartanburg County sites, aerial documentation expands the number of sites that can be covered 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 Spartanburg County sites, see drone SWPPP inspection support for Spartanburg.

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