Overview
Merrill Field Airport MOA is a stormwater outfall in Anchorage, Alaska, managing runoff from airport operations. It operates under US EPA NPDES MS4 permit regulations.
Merrill Field Airport MOA is a stormwater outfall located at 800 Merrill Field Drive in Anchorage, Alaska. As part of the airport's infrastructure, it manages stormwater runoff from the facility, which includes aircraft parking areas, taxiways, and other impervious surfaces typical of an airport environment. The outfall discharges into local waterways, contributing to the stormwater management system of the Anchorage Municipality. The facility operates under the regulatory framework of the US EPA's National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permits. As a Phase II small MS4, it must implement best management practices to reduce pollutant discharges and protect water quality. The outfall is part of a network that handles runoff from the airport's catchment area, which includes potential contaminants such as de-icing fluids, fuel residues, and sediment. Environmental significance lies in its role in managing stormwater from an active airport, which can impact nearby water bodies like the Knik Arm of Cook Inlet. Proper operation helps mitigate pollution from urban runoff, supporting local water quality goals. The facility's location in Anchorage, a region with sensitive aquatic ecosystems, underscores the importance of effective stormwater management.
Environmental context
Anchorage is situated in a subarctic climate with significant seasonal snowmelt and rainfall, leading to variable stormwater flows. The outfall discharges into waters that eventually reach Cook Inlet, an estuary supporting salmon and other marine life. Urban runoff from airport operations can introduce pollutants such as hydrocarbons, heavy metals, and de-icing chemicals, posing risks to aquatic habitats. Regulatory oversight under the Clean Water Act aims to control these discharges through MS4 permits.
Frequently asked questions
The outfall is located at 800 Merrill Field Drive in Anchorage, Alaska, within the Anchorage Municipality.
It discharges stormwater runoff from the airport's impervious surfaces, such as runways and parking areas, into local waterways, managing urban runoff.
It operates under the US EPA NPDES MS4 permit program, likely as a Phase II small MS4, requiring stormwater management practices to reduce pollution.
Airport runoff can contain de-icing fluids, fuel residues, and sediment, which may harm aquatic life if not properly treated. MS4 permits mandate controls to mitigate these impacts.
MS4 permits require operators to develop stormwater management programs, including public education, illicit discharge detection, and construction site runoff control, to protect water quality.
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