SRM Plant #513 Stormwater Outfall, Madison, Alabama | United States

SRM Plant #513 is a stormwater outfall located at 7293 Greenbrier Parkway in Madison, Limestone County, Alabama, United States. The facility is operational and serves as a point of discharge for stormwater runoff in the area. As a stormwater outfall, it is part of the broader municipal separate storm sewer system (MS4) infrastructure managed under the US EPA's National Pollutant Discharge Elimination System (NPDES) program. The facility operates within the regulatory context of the Clean Water Act, which governs stormwater discharges through NPDES MS4 permits. In Alabama, the Alabama Department of Environmental Management (ADEM) administers the NPDES program. The NAICS code 327320 indicates the facility is associated with ready-mix concrete manufacturing, suggesting the outfall may handle runoff from industrial or construction-related activities. Stormwater outfalls like this one are designed to convey runoff from impervious surfaces to receiving waters, with permit requirements often including monitoring for pollutants such as sediment, nutrients, and metals. The environmental significance of SRM Plant #513 lies in its role in managing stormwater quality in the Madison area. Discharges from the outfall may affect local water bodies, including the Tennessee River watershed. Proper operation and maintenance of the outfall help mitigate flooding and reduce pollutant loads, supporting compliance with water quality standards. The facility's location in an urbanizing area underscores the importance of stormwater management in protecting downstream ecosystems and community resources.

The facility is located in Madison, Alabama, within the Tennessee River basin. The region experiences a humid subtropical climate with frequent rainfall, making stormwater management critical for flood control and water quality. Urban and industrial runoff from areas like the Greenbrier Parkway corridor can carry pollutants such as sediment, nutrients, and heavy metals into receiving waters. The outfall's discharge may be subject to NPDES permit limits to protect aquatic life and recreational uses in downstream water bodies.