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SEA Sustainable Airport Master Plan: ILA, Budget Amendment, Letters of Engagement (AB 6794)

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SAMP
Four City ILA

The cities of SeaTac, Burien, Des Moines, and Normandy Park are jointly challenging the FAA's environmental review of the Port of Seattle's Sustainable Airport Master Plan (SAMP), arguing that a September 2025 Finding of No Significant Impact (FONSI) failed to adequately address their concerns about airport expansion impacts. The SeaTac City Council is being asked to approve a budget amendment of up to $350,000, authorize an Interlocal Agreement among the four cities, and hire two law firms to advocate for airport-affected communities. The action reflects ongoing efforts by neighboring cities to ensure environmental impacts of SEA airport growth are properly evaluated under both federal (NEPA) and state (SEPA) law.

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City of SeaTac council presentation (AB 6794) seeking approval of three actions related to the FAA’s September 26, 2025 Finding of No Significant Impact (FONSI) on the Port of Seattle Sustainable Airport Master Plan (SAMP): (1) budget amendment to 2025-2026 Biennial Budget Port ILA Fund 105 for up to $350,000 in expenditures and $253,000 in revenues; (2) authorization for City Manager to sign a four-city Interlocal Agreement (ILA) with Burien, Des Moines, and Normandy Park; (3) authorization to sign letters of engagement with law firms Leech Tishman and Ogden Murphy Wallace. Cities assert FAA NEPA Environmental Assessment failed to adequately address comments or document environmental impacts; SEPA implications also noted. Reviewed by PED Committee on 10/16/2025 and RCM on 11/12/2025.

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