UGADAGA QUARRY Stormwater Outfall, Unalaska, Alaska | United States

UGADAGA QUARRY is a stormwater outfall located on Overland Drive in Unalaska, Alaska, within the Aleutians West Census Area. This facility manages stormwater runoff from a quarry operation, classified under NAICS 212319 (Other Crushed and Broken Stone Mining and Quarrying). As a stormwater outfall, it discharges collected runoff into local waterways, subject to regulatory oversight. The facility operates under the US Clean Water Act and EPA's NPDES MS4 permit framework. In Alaska, stormwater discharges from industrial activities like quarries are typically regulated under Multi-Sector General Permits (MSGP) or individual permits. The outfall likely serves an industrial catchment area, managing runoff from the quarry site to prevent erosion and pollutant transport. Environmental significance lies in its location in Unalaska, a coastal community in the Aleutian Islands. Stormwater management here is critical to protect local marine ecosystems from sediment and potential contaminants. The facility's compliance with permit conditions ensures minimal impact on receiving waters, supporting both ecological health and community water quality goals.

Unalaska is located in the Aleutian Islands, a region with a maritime climate and sensitive marine ecosystems. Stormwater runoff from industrial sites like quarries can carry sediment, heavy metals, and other pollutants into nearby waters, potentially affecting fisheries and wildlife. The facility's discharge must comply with water quality standards to protect these resources.