Dillingham Airport Stormwater Outfall - Dillingham, Alaska

Dillingham Airport Stormwater Outfall is a stormwater management facility located at 803 Airport Road in Dillingham, Alaska. It serves the Dillingham Airport area, handling stormwater runoff from airport infrastructure and surrounding impervious surfaces. As a stormwater outfall in a small Alaskan community, it operates under the US EPA's National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permit framework, which regulates discharges to protect water quality. The facility is operational and falls under the jurisdiction of the Clean Water Act. In Alaska, stormwater management is critical due to sensitive aquatic ecosystems and cold climate conditions that affect runoff patterns. The outfall likely discharges to nearby surface waters, potentially including the Nushagak River or Bristol Bay watershed, which are important for salmon fisheries. Typical stormwater controls may include detention basins, oil-water separators, or vegetated swales to treat runoff before discharge. Environmental significance includes protecting downstream water bodies from pollutants such as sediment, oil, and deicing chemicals common at airports. The facility's location in a remote area highlights the importance of stormwater management in preserving Alaska's pristine water resources. Compliance with NPDES permit requirements ensures that discharges meet water quality standards, supporting local ecosystems and community water uses.

Dillingham is located in southwestern Alaska near Bristol Bay, a region renowned for its salmon fisheries and pristine watersheds. Stormwater runoff from airport operations can carry pollutants like petroleum hydrocarbons, deicing fluids, and sediment, which pose risks to aquatic life. The facility operates under the US EPA's NPDES MS4 program, which requires stormwater management plans to minimize pollutant discharge. Given the ecological sensitivity of the area, effective stormwater treatment is essential to protect water quality and support the local fishing industry.