TagSEPA(233)

This technical report, prepared by Parametrix for the Port of Seattle in February 2024, documents the wetlands and streams found at Seattle-Tacoma International Airport as part of the Sustainable Airport Master Plan (SAMP) Near Term Projects. It covers the delineation of wetland and stream boundaries, assessments of potential impacts to these aquatic areas from planned airport projects, and proposed mitigation measures and permitting strategies to address those impacts.

This Washington State fiscal note summarizes the estimated costs of House Bill 2070, which relates to environmental justice and State Environmental Policy Act (SEPA) projects. The bill is projected to cost multiple state agencies a combined total of approximately $1.28 million in operating expenditures for 2023-25, rising to $2.64 million in 2025-27, before declining to about $1.61 million in 2027-29. The Department of Ecology, Department of Fish and Wildlife, and Office of the Attorney General are among the primary agencies expected to incur costs, with some impacts remaining indeterminate.

Washington State House Bill 2070 requires government agencies to complete environmental justice impact statements alongside standard environmental reviews for new, expanding, or permit-renewing projects located in pollution-burdened communities. The bill outlines what these statements must include, how affected communities must be notified and given input, and mandates that agencies deny or require mitigation for projects that would worsen environmental or public health conditions in already overburdened areas. Note that this bill addresses broad statewide environmental justice policy and does not specifically pertain to Sea-Tac Airport noise issues.

Washington Senate Bill 5990, introduced in the 2024 legislative session, aims to reduce environmental health disparities by requiring detailed impact assessments before approving projects in communities already burdened by pollution. The bill defines key terms such as 'disproportionate impact' and 'environmental justice impact statement,' and establishes a framework for evaluating whether new or expanded projects would worsen cumulative health and environmental stressors in overburdened communities. Note: this bill addresses broad environmental justice policy statewide and does not specifically address Sea-Tac Airport noise or aviation-related impacts.

This technical report, prepared by Landrum & Brown for the Port of Seattle in January 2024, assesses hazardous materials, solid waste, and pollution prevention concerns related to near-term construction projects under the Sustainable Airport Master Plan at Seattle-Tacoma International Airport. It includes investigations of contaminated fuel farm sites, environmental baseline studies, and regulated building materials surveys (such as asbestos and lead) for several airport facilities slated for redevelopment. The report compiles findings and regulatory correspondence from Washington State Department of Ecology to guide safe handling and cleanup of hazardous materials during planned airport improvements.

This Land Use Technical Report, prepared for the Port of Seattle's Sustainable Airport Master Plan Near-Term Projects, examines how proposed improvements at Seattle-Tacoma International Airport align with land use plans and regulations in surrounding communities including SeaTac, Des Moines, Burien, and Tukwila. It reviews existing and planned land uses, relevant local and regional planning documents, and assesses potential land use impacts under three alternatives: No Action, Proposed Action, and a Hybrid Terminal Option. The report was originally prepared in January 2024 by Landrum & Brown and later updated in April 2026 by Parametrix for the SEPA Environmental Impact Statement.

The Des Moines, WA City Council considered a staff recommendation to transfer review of the Des Moines Creek Business Park West Master Plan (LUA2022-0044) from the Council to the city's Hearing Examiner. The proposed 30-acre development near South 216th Street would include a 402,380-square-foot industrial building and requires complex environmental review, including a variance to fill ravine sidewalls and potentially realign a stream. Due to the technical complexity of the land use and environmental issues involved, staff and the City Attorney recommended consolidating the Master Plan review with the required variance before the Hearing Examiner.

This technical memorandum, prepared by Leigh Fisher for the Port of Seattle in September 2023, presents an updated aviation activity forecast for Seattle-Tacoma International Airport. It includes Constrained Operating Growth Scenarios (COGS), FAA approval of the forecast update, and airside modeling documentation used to support environmental review. The forecast and operational assumptions outlined in this document serve as the foundation for planning future airport capacity and assessing potential noise and environmental impacts.

This appendix from the Puget Sound Regional Council's long-range transportation plan, Destination 2030, outlines the process for amending the plan and making major capacity investment decisions. It explains that the plan must be reviewed every three years under federal law and every two years under Washington State law, with air quality conformity statements required when amendments are made. The document also provides guidance on evaluating transportation corridor investments, assessing benefits and costs, and classifying projects as either 'Candidate' or 'Approved' for implementation.

This June 2022 presentation by Des Moines Chief Strategic Officer Susan Cezar provides an update on the environmental review of Near Term Projects under the Port of Seattle's Sustainable Airport Master Plan (SAMP). It outlines the history of the review process dating back to 2015, including a multi-city inter-local agreement between Des Moines, Burien, Normandy Park, and SeaTac to coordinate responses to the Port's environmental documents. City staff continue to monitor the Port's compliance with federal (NEPA) and state (SEPA) environmental requirements as airport capital projects move forward.