10TH STREET DTL SITE Stormwater Outfall, Birmingham, Alabama

10TH STREET DTL SITE is a stormwater outfall located in Birmingham, Jefferson County, Alabama, United States. As a stormwater outfall, it serves as a discharge point for stormwater runoff from the surrounding urban catchment, including roads and industrial areas near Richard Arrington Jr. Blvd North and I20. The facility is operational and falls under the regulatory oversight of the US Clean Water Act and the Alabama Department of Environmental Management. Stormwater outfalls like this one are typically part of a municipal separate storm sewer system (MS4) and are subject to NPDES Phase II permit requirements for small municipalities. The facility's primary function is to convey stormwater runoff from impervious surfaces to receiving waters, which may include local creeks or the Black Warrior River watershed. The NAICS code 482111 indicates a rail transportation context, suggesting the outfall may serve a rail yard or related infrastructure. Environmental significance of this outfall includes potential impacts on water quality in the receiving water body. Stormwater runoff from urban areas can carry pollutants such as sediment, heavy metals, and hydrocarbons. The facility's location in an industrial and transportation corridor highlights the importance of stormwater management practices to mitigate pollution and comply with Total Maximum Daily Load (TMDL) requirements for impaired waters in the region.

Birmingham, Alabama, experiences a humid subtropical climate with frequent thunderstorms, leading to significant stormwater runoff. The area's urban and industrial land use contributes pollutants such as sediment, nutrients, and metals to local waterways. The Black Warrior River watershed, which receives runoff from this outfall, is subject to TMDL regulations for impairments including pathogens and siltation. Effective stormwater management is critical to protect water quality and aquatic habitats in this region.