GREAT CIRCLE FLIGHT SERVICES ANC-GP Stormwater Outfall, Anchorage, Alaska

GREAT CIRCLE FLIGHT SERVICES ANC-GP is a stormwater outfall located at 6121 S. Airpark Place, #2, in Anchorage, Alaska. This facility manages stormwater runoff from an aviation-related industrial site, classified under NAICS 481111 (Scheduled Passenger Air Transportation). As a stormwater outfall, it discharges collected runoff into local waterways, subject to federal and state regulatory oversight. The facility operates under the US EPA National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permit framework. Anchorage, as a Phase I MS4 municipality, requires stormwater discharges from industrial facilities to comply with stormwater pollution prevention plans (SWPPPs) and monitoring requirements. The outfall likely handles runoff from impervious surfaces such as aprons, taxiways, and parking areas, with typical treatment including sedimentation basins or oil-water separators. This outfall plays a role in managing stormwater quality in the Anchorage area, particularly given the proximity to Cook Inlet and sensitive aquatic habitats. Effective stormwater management helps reduce pollutant loads from aviation activities, supporting local water quality goals and compliance with the Clean Water Act.

Anchorage's stormwater systems discharge into Cook Inlet, a large estuary that supports salmon, beluga whales, and other marine life. Industrial stormwater from aviation facilities can carry pollutants such as heavy metals, hydrocarbons, and deicing agents. Regulatory oversight under the NPDES MS4 program aims to control these discharges to protect water quality and aquatic habitats.