UNALASKA AIRPORT Stormwater Outfall, Dutch Harbor, Alaska

UNALASKA AIRPORT is a stormwater outfall located at Airport Beach Rd in Dutch Harbor, Alaska, within the Aleutians West County. This facility manages stormwater runoff from airport operations, serving the transportation infrastructure of the region. As a stormwater outfall, it is part of the broader network of facilities regulated under the US Clean Water Act. The facility operates under the National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permit framework, which governs stormwater discharges from municipal and industrial sources. In Alaska, stormwater management is critical due to the sensitive ecological environment. The outfall likely handles runoff from impervious surfaces such as runways, parking lots, and buildings, with typical treatment including sedimentation basins or oil-water separators. Environmental significance includes potential discharge to nearby water bodies, which may be impaired or ecologically sensitive. Proper management of stormwater from airport operations is essential to prevent pollutants like de-icing chemicals, fuel residues, and sediment from impacting local aquatic habitats. The facility's role in protecting water quality aligns with EPA's stormwater program goals.

Dutch Harbor is located in the Aleutian Islands, a region with a cold maritime climate and high precipitation. Stormwater runoff from airport operations can carry pollutants such as de-icing fluids, petroleum hydrocarbons, and heavy metals. The area's coastal waters support diverse marine life, including fish and seabirds, making stormwater treatment important for ecosystem health. Regulatory oversight under the Clean Water Act ensures that discharges meet water quality standards.