AVALAN Stormwater Outfall, Madison, Alabama | United States

AVALAN is a stormwater outfall located at 127 Jetplex Circle in Madison, Alabama, within the United States. As a stormwater outfall, it serves as a discharge point for stormwater runoff from the surrounding urban catchment, which includes residential, commercial, and industrial areas typical of Madison's growing community. The facility is operational and falls under the regulatory oversight of the Alabama Department of Environmental Management (ADEM) and the U.S. Environmental Protection Agency (EPA) under the National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) program. Stormwater outfalls like AVALAN are critical components of urban drainage infrastructure, designed to convey runoff to receiving waters while minimizing flooding and erosion. In the context of Madison, Alabama, the outfall likely discharges into local streams or the Tennessee River basin. The facility's location in an industrial area (Jetplex Circle) suggests that the catchment may include industrial land uses, which can introduce pollutants such as heavy metals, oils, and sediments into stormwater runoff. Regulatory compliance typically involves monitoring for pollutants and implementing best management practices (BMPs) to reduce impacts. The environmental significance of AVALAN lies in its role in managing stormwater quality and quantity in a rapidly urbanizing region. Proper operation helps protect downstream water bodies from pollution and flooding, supporting local ecosystems and community resilience. The facility is part of a broader network of stormwater infrastructure that Madison and Madison County manage to meet Clean Water Act requirements and maintain water quality standards.

The AVALAN outfall discharges into the Tennessee River watershed, which supports diverse aquatic habitats and provides drinking water for millions. Urban runoff from Madison's industrial and residential areas can carry pollutants like sediment, nutrients, and heavy metals, potentially impacting water quality. The facility operates under EPA's NPDES MS4 permit, requiring stormwater management plans to reduce pollutant loads and protect receiving waters.