UNION COUNTY CONSTRUCTION MATERIALS SITE Stormwater Outfall, El Dorado, Arkansas

UNION COUNTY CONSTRUCTION MATERIALS SITE is a stormwater outfall located in El Dorado, Union County, Arkansas, USA. The facility handles stormwater runoff from construction materials activities, classified under NAICS 212321 (Construction Sand and Gravel Mining). As a stormwater outfall, it is part of the broader network of facilities managing industrial stormwater discharges. The facility operates under the US EPA's National Pollutant Discharge Elimination System (NPDES) permitting framework, specifically for industrial stormwater discharges. In Arkansas, the Arkansas Department of Energy and Environment - Division of Environmental Quality (DEQ) administers the NPDES program. Facilities in this sector are required to develop and implement Stormwater Pollution Prevention Plans (SWPPPs) to minimize pollutant runoff. Stormwater management at construction materials sites is critical to prevent sediment, nutrients, and other pollutants from entering local waterways. The facility's location in Union County, near El Dorado, places it within the Ouachita River basin, where effective stormwater control helps protect downstream water quality and aquatic habitats.

The facility is located in Union County, Arkansas, within the Ouachita River watershed. This region experiences a humid subtropical climate with significant rainfall, making stormwater management important to prevent erosion and runoff of sediments and pollutants. Construction materials operations can generate silt-laden runoff that may impact local streams and rivers if not properly controlled. Regulatory oversight under the Clean Water Act and state NPDES permits ensures that best management practices are in place to mitigate these risks.