ROCK ALASKA QUARRY Stormwater Outfall, Chugiak, Alaska | USA

ROCK ALASKA QUARRY is a stormwater outfall located at 17415 Old Glenn Hwy in Chugiak, Alaska, within the Anchorage Municipality. As a stormwater outfall, it manages runoff from a quarry operation classified under NAICS 212319 (Other Crushed and Broken Stone Mining and Quarrying). The facility is operational and falls under the regulatory framework of the US Clean Water Act and EPA NPDES MS4 permits, which govern stormwater discharges from industrial activities. In Alaska, stormwater management is critical due to the state's sensitive aquatic ecosystems and seasonal hydrology. Quarry operations like this one must implement best management practices (BMPs) to control sediment, erosion, and potential contaminants in runoff. Environmental significance includes the potential for discharge to nearby water bodies, which may be impaired or ecologically sensitive. The Anchorage area experiences snowmelt and rainfall that can carry pollutants from industrial sites. Compliance with NPDES permit conditions is essential to protect water quality and aquatic habitats.

The facility is located in Chugiak, Alaska, within the Anchorage Municipality, an area with cold climate and seasonal snowmelt that influences stormwater runoff patterns. Quarry operations can generate sediment-laden runoff and potential contaminants such as heavy metals. Discharge from the outfall may enter local streams or rivers that are part of the Cook Inlet watershed, which supports salmon and other aquatic species. Regulatory oversight under the Clean Water Act requires adherence to NPDES MS4 permits to minimize environmental impact.