Overview
SITE 4 is an operational stormwater outfall in Eagle River, Alaska, serving the Anchorage Municipality. It discharges stormwater runoff under the US EPA NPDES MS4 permit framework.
SITE 4 is a stormwater outfall located at 13950 Eklutna Park Drive in Eagle River, Alaska, within the Anchorage Municipality. As a stormwater outfall, it functions as a discharge point for collected stormwater runoff from the surrounding urban and suburban areas. The facility is operational and falls under the regulatory oversight of the US EPA's National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permits, which govern stormwater discharges in Alaska. In Alaska, stormwater management is critical due to the state's unique hydrology and sensitive ecosystems. The facility likely handles runoff from roads, residential areas, and commercial zones in Eagle River. Typical stormwater outfalls in this region may include basic conveyance structures without advanced treatment, relying on natural attenuation. The regulatory framework requires permits for discharges to ensure compliance with water quality standards under the Clean Water Act. The environmental significance of SITE 4 lies in its role in managing urban runoff that could otherwise carry pollutants into local water bodies. Eagle River is near the Knik Arm of Cook Inlet, an area with important fish habitats. Proper stormwater management helps mitigate impacts from sediment, nutrients, and contaminants, supporting the ecological health of downstream waters. The facility's operation aligns with community goals for flood control and water quality protection.
Environmental context
Eagle River is located in south-central Alaska, within the Anchorage Municipality, and experiences a subarctic climate with significant seasonal snowmelt. Stormwater runoff from urban areas can carry pollutants such as sediment, oil, and heavy metals into local streams and the Knik Arm of Cook Inlet. These water bodies support salmon runs and other aquatic life, making stormwater management crucial for maintaining water quality and habitat integrity. The facility operates under the US EPA NPDES MS4 permit program, which requires best management practices to reduce pollutant loads.
Frequently asked questions
SITE 4 is located at 13950 Eklutna Park Drive in Eagle River, Alaska, within the Anchorage Municipality, United States.
SITE 4 is a stormwater outfall that discharges collected stormwater runoff from urban and suburban areas in Eagle River into local waterways, helping to manage flood risks and convey runoff.
SITE 4 operates under the US EPA National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permits, which require compliance with water quality standards under the Clean Water Act.
Alaska's stormwater management must account for cold climates, permafrost, and seasonal snowmelt, which affect runoff patterns and pollutant transport. The NPDES MS4 program is adapted to these conditions, emphasizing best management practices for sediment and temperature control.
Stormwater outfalls can discharge pollutants such as sediment, oil, and nutrients into water bodies. Proper management through permits and best practices helps protect aquatic habitats, including salmon streams in the Cook Inlet watershed.
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