Overview
OLD DOMINION - MOB is a stormwater outfall in Mobile, Alabama, United States. It operates under the US EPA NPDES MS4 permit framework.
OLD DOMINION - MOB is a stormwater outfall located at 5470 Todd Acres Drive in Mobile, Alabama, United States. This facility is part of the stormwater management infrastructure serving the Mobile area, handling runoff from urban and industrial catchments. As an operational outfall, it discharges stormwater into local waterways, contributing to flood control and water quality management. The facility operates under the regulatory framework of the US Clean Water Act and the EPA's National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permits. Mobile is subject to Phase II MS4 requirements as a small municipality, meaning the outfall must comply with stormwater management plans to reduce pollutant discharges. Typical stormwater outfalls in Alabama manage flows from impervious surfaces, with discharge volumes varying based on rainfall intensity and catchment area. This outfall plays a role in managing stormwater runoff in Mobile County, helping to mitigate localized flooding and protect downstream water bodies. The environmental significance lies in its contribution to the overall stormwater network, which aims to reduce the impact of urban runoff on local streams and rivers. Proper operation supports compliance with water quality standards and community resilience.
Environmental context
Mobile, Alabama, has a humid subtropical climate with high annual rainfall, leading to significant stormwater runoff. The outfall discharges into local waterways that may be impaired by urban pollutants such as sediment, nutrients, and heavy metals. The facility's catchment includes residential and commercial areas, necessitating best management practices to control runoff quality. Regulatory compliance under the NPDES MS4 permit requires monitoring and mitigation of discharges to protect aquatic ecosystems.
Frequently asked questions
OLD DOMINION - MOB is located at 5470 Todd Acres Drive in Mobile, Alabama, United States.
It is a stormwater outfall that discharges runoff from urban areas in Mobile, helping to manage stormwater and prevent flooding.
The outfall operates under the US Clean Water Act and EPA's NPDES MS4 permit program, which requires stormwater management plans to control pollution.
Mobile is subject to Phase II MS4 requirements, meaning the city must implement best management practices for stormwater runoff, including public education, illicit discharge detection, and construction site controls.
Common pollutants include sediment, nutrients, heavy metals, oil and grease, and pathogens from urban runoff, which can impair water quality in receiving streams.
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