TagEnvironmental Impact Statement(140)

The cities of Burien, Des Moines, Normandy Park, and SeaTac have entered into a formal interlocal agreement to coordinate their review of, and potential legal challenges to, the Port of Seattle's Sustainable Airport Master Plan, which could bring significant growth and environmental impacts to their communities over the next 20 years. Under the agreement, the four cities will jointly hire environmental consultants and legal counsel, share costs proportionally based on population, and issue unified comment letters during the NEPA and SEPA review processes. The City of SeaTac is designated as the lead administrator for contracts and finances, while all four cities must unanimously agree before filing any joint legal appeal.

A report by the Washington State Department of Ecology’s Air Quality Program examining overburdened communities that are highly impacted by air pollution. The document includes publication information, contact details for regional offices, and ADA accessibility information.

The cities of Burien, Des Moines, and SeaTac are joining forces under a formal Interlocal Agreement to coordinate their review of and legal response to the Port of Seattle's Sea-Tac Airport Sustainable Airport Master Plan (SAMP), which could bring significant noise and environmental impacts to surrounding communities. The agreement, considered by Des Moines City Council on November 13, 2025, allows the three cities to jointly hire environmental consultants and legal counsel to analyze and formally challenge the airport expansion's environmental review under both federal (NEPA) and state (SEPA) law. A Draft Environmental Impact Statement from the Port is expected in early 2026, with the overall process estimated to conclude by December 31, 2028.

The cities of Burien, Des Moines, Normandy Park, and SeaTac are proposing a formal Interlocal Agreement to coordinate their response to the Port of Seattle's Sustainable Airport Master Plan (SAMP), which could bring significant growth and environmental impacts to surrounding communities over the next 20 years. Under the agreement, the four cities would jointly hire consultants and legal counsel to review environmental documents, submit formal comments during the SEPA and NEPA review processes, and potentially mount legal challenges to FAA or Port decisions. Burien's share of costs is estimated at approximately $100,000.

The City of Des Moines, Washington, formally requests that the Port of Seattle reject the Determination of Non-Significance (DNS) for the Sea-Tac Airport Flight Corridor Management Program, arguing that it fails to adequately assess impacts on the city's tree canopy and urban forest. City Manager Katherine Caffrey urges the Port to instead conduct a full Environmental Impact Statement (EIS) examining tree removal, urban heat, air quality, stormwater, and habitat effects. The letter emphasizes that Des Moines residents already face disproportionate noise and health burdens from airport traffic, making tree canopy preservation especially critical to their wellbeing.

The U.S. Supreme Court ruled in May 2025 that federal agencies have broad discretion in determining the scope of environmental reviews required under the National Environmental Policy Act (NEPA). The case involved a proposed 88-mile railroad in Utah, where the Court held that agencies do not need to analyze the environmental effects of separate upstream or downstream projects — such as oil drilling or refining — when reviewing a specific infrastructure project. Courts must give substantial deference to agency decisions about what to include in environmental impact statements, rather than imposing their own judgment about what details are required.