The public comment period is now underway for the State Environmental Policy Act (SEPA) Draft Environmental Impact Statement (DEIS) for the Port of Seattle’s Sustainable Airport Master Plan (SAMP) Near-Term Projects (NTPs) for Seattle-Tacoma International Airport (SEA).
SEA serves as a gateway for the over 8 million people who live in our state, and for the 1 million more expected to move to the Puget Sound by 2035. To meet our region’s future needs and support a great traveler experience, the Port of Seattle proposed a plan to guide future development for the airport. The planned projects will not only make SEA more efficient but will include benefits for people using and working at the airport, as well as provide transportation improvements in and around the airport.
The DEIS is a crucial step under the SEPA process. This process ensures that public agencies assess the environmental impacts of proposed actions and provide opportunities for public input.
Comments should provide sufficient detail for the agency to understand the commenter’s position and why the issues raised are important to the decision-making process. Public comments can be submitted online, by email, by regular mail, or in person at one of the four in-person public meetings taking place in June. The same information will be presented at all meetings in an open house format. Language translation assistance will be available at all public meetings in addition to childcare services.
We encourage you to visit the SAMP website to explore details about SAMP, the proposed NTPs, the SEPA process, and how to participate during the public comment period. Your feedback is valuable to us! Sign up for future updates.
Public meeting information
| Date | Time | Location |
|---|---|---|
| Monday, June 22, 2026 | 6–8 p.m. | Glacier Middle School Entrance lobby/commons 2450 S 142nd St., SeaTac, WA 98168 |
| Tuesday, June 23, 2026 | 6–8 p.m. | Mount Rainier High School Cafeteria space 22450 19th Ave. S, Des Moines, WA 98198 |
| Thursday, June 25, 2026 | 6–8 p.m. | Wildwood Elementary School Multipurpose room 2405 S 300th St., Federal Way, WA 98003 |
| Saturday, June 27, 2026 | 10 a.m.–12 p.m. | Gregory Heights Elementary School Cafeteria and gym 16201 16th Ave. SW, Burien, WA 98166 |
Physical copies of the SEPA DEIS can be viewed at:
- The Conference Center at SEA, 17801 International Blvd., SeaTac, WA 98158
- Port of Seattle Headquarters, Pier 69, 2711 Alaskan Way, Seattle, WA 98121
- Burien Library, 400 SW 152nd St., Suite 100, Burien, WA 98166
- Des Moines Library, 21620 11th Ave. S, Des Moines, WA 98198
- Valley View Library, 17850 Military Road S, SeaTac, WA 98188
- Federal Way 320th Library, 848 S 320th St., Federal Way, WA 98003
- White Center Library, 1409 SW 107th St., Seattle, WA 98146
- Tukwila Library, 14380 Tukwila International Blvd., Tukwila, WA 98168
- Vashon Library, 17210 Vashon Hwy. SW, Vashon Island, WA 98070
Additional ways to get involved
- Sign up for our email newsletter by selecting the Sustainable Airport Master Plan notifications box underneath “Environment and Sustainability News”
- Submit a public comment online through the SEA SAMP website or by sending an email to [email protected]
- Submit a public comment by mail:
Mr. Steve Rybolt
Port of Seattle, Aviation Environment and Sustainability
P.O. Box 68727, Seattle, WA 98168
Contact
Port of Seattle Newsroom
Online Media Guide and Resources
Email [email protected]
