HIGHWAY 11 BORROW SITE Stormwater Outfall, Attalla, Alabama | US Stormwater Management

HIGHWAY 11 BORROW SITE is a stormwater outfall located in Attalla, Etowah County, Alabama, United States. The facility manages stormwater runoff from an industrial catchment, likely associated with mining or quarrying activities given its NAICS code 212399 (Other Nonmetallic Mineral Mining and Quarrying). As a stormwater outfall, it discharges collected runoff into local waterways, operating under the regulatory framework of the US Clean Water Act and EPA NPDES MS4 permits. The facility is situated in a region with a humid subtropical climate, characterized by significant rainfall throughout the year, which influences stormwater management needs. While specific technical specifications such as discharge volume are not detailed, the outfall is part of a network designed to control flooding and prevent pollutant transport from industrial sites. The regulatory context includes compliance with Phase II MS4 requirements for small municipalities and industrial stormwater permits. Environmental significance lies in its role in managing runoff from an industrial area, which can contain sediments, metals, and other pollutants. Proper operation helps protect downstream water quality in the Coosa River basin. The facility contributes to community resilience by mitigating flood risks and supporting local industrial activity while adhering to environmental standards.

The facility discharges stormwater from an industrial catchment in the Coosa River basin, a region with clay-rich soils and moderate slopes that can generate sediment-laden runoff. The area's humid subtropical climate produces intense rainfall events, increasing the risk of erosion and pollutant transport. Regulatory oversight under the Clean Water Act requires controls to minimize impacts on receiving waters, which may be impaired by urban and industrial runoff.