DUNN CONSTRUCTION-RAP & SLAG YARD Stormwater Outfall, Birmingham, Alabama

DUNN CONSTRUCTION-RAP & SLAG YARD is a stormwater outfall located at 715 39th Street North in Birmingham, Jefferson County, Alabama. This facility manages stormwater runoff from an industrial yard involved in construction materials recycling, including reclaimed asphalt pavement (RAP) and slag. As a stormwater outfall, it discharges collected runoff into local waterways, operating under the regulatory framework of the US EPA's National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permits. In Alabama, stormwater discharges from industrial facilities are regulated under the NPDES program, requiring permits that set limits on pollutants such as sediment, oil and grease, and heavy metals. The facility's operations involve handling construction materials, which may contribute pollutants like suspended solids and trace metals to stormwater runoff. Typical best management practices (BMPs) for such sites include sediment basins, vegetative swales, and regular street sweeping to reduce pollutant loads. The environmental significance of this outfall lies in its potential impact on receiving waters in the Birmingham area, which drain into the Black Warrior River watershed. Proper stormwater management is critical to prevent erosion, flooding, and contamination of local water bodies. The facility's compliance with its NPDES permit ensures that runoff is treated to meet water quality standards, protecting aquatic ecosystems and downstream communities.

Birmingham, Alabama, experiences a humid subtropical climate with frequent thunderstorms, leading to significant stormwater runoff. The facility is located in an industrial area, and its discharge may enter tributaries of the Black Warrior River. The US EPA's NPDES MS4 program requires permits for stormwater discharges from industrial sites to control pollutants like sediment and heavy metals. Compliance with these regulations is essential to protect water quality in the region.