Joint Base Elmendorf-Richardson Stormwater Outfall, Anchorage, Alaska

Joint Base Elmendorf-Richardson (JBER) is a United States military installation located in Anchorage, Alaska, that operates a stormwater outfall to manage surface runoff from its extensive facilities. As a large federal facility, JBER's stormwater management is subject to the EPA's NPDES MS4 permitting program, which regulates discharges from municipal separate storm sewer systems to protect water quality. The outfall handles stormwater runoff from the base's diverse operations, including airfields, barracks, industrial areas, and administrative buildings. The facility's stormwater system is designed to convey runoff to nearby receiving waters, likely including tributaries of Cook Inlet. Given the base's size and mixed-use catchment, the outfall must comply with permit limits for pollutants such as sediment, oil and grease, and heavy metals. Operationally, JBER's stormwater outfall plays a critical role in preventing localized flooding and protecting downstream aquatic habitats in the Anchorage area. The facility's compliance with Clean Water Act requirements ensures that runoff from military activities does not impair water quality in receiving waters, which support salmon and other sensitive species. Regular monitoring and best management practices are essential to maintain permit compliance and environmental stewardship.

The stormwater outfall at Joint Base Elmendorf-Richardson discharges into the Cook Inlet watershed, which supports critical salmon runs and diverse wildlife. The base's urban and industrial catchment includes impervious surfaces that can increase runoff volumes and pollutant loads. Under the EPA's NPDES MS4 program, the facility must implement controls to minimize sediment, heavy metals, and hydrocarbon discharges to protect these sensitive aquatic ecosystems.