DELTA ASPHALT/BLK ROCK QUARRY Stormwater Outfall, Black Rock, Arkansas

DELTA ASPHALT/BLK ROCK QUARRY is a stormwater outfall located at 4437 U S Hwy 63 West in Black Rock, Lawrence County, Arkansas. This facility manages stormwater runoff from industrial activities including crushed stone mining (NAICS 212312, 212319) and asphalt paving mixture manufacturing (NAICS 324121). As a stormwater outfall, it discharges collected runoff into local waterways, operating under the regulatory framework of the Clean Water Act and EPA's NPDES MS4 permit program. The facility's industrial catchment area includes quarrying and asphalt production, which typically generate stormwater runoff containing sediment, metals, and hydrocarbons. In Arkansas, stormwater discharges from industrial facilities are regulated under the state's NPDES General Permit for Stormwater Discharges Associated with Industrial Activity. The facility likely implements best management practices such as sediment basins, silt fences, and oil-water separators to control pollutant loads before discharge. Located in northeastern Arkansas, the facility's discharge may affect nearby water bodies in the White River basin. Proper stormwater management is critical to protect downstream water quality and aquatic habitats. The facility's operational status indicates ongoing compliance with permit requirements, contributing to local flood control and environmental protection efforts in Lawrence County.

The facility is situated in Lawrence County, Arkansas, within the Mississippi Alluvial Plain ecoregion. Stormwater runoff from industrial sites like quarries and asphalt plants can carry sediment, heavy metals, and hydrocarbons into local streams. The region's clay-rich soils and seasonal heavy rainfall increase runoff volumes, necessitating effective erosion and sediment control. Discharges may impact tributaries of the White River, which supports diverse aquatic life and recreational uses.