Item No.
Date of Meeting

S Concourse Evolution Multi-Year
Authorization

10a_supp
August 11, 2026

Agenda
• Program Purpose & Objectives
• Project Status
• Requested Authorization
• Commission Roadmap
• Construction Schedule
• Design - Renderings
• Fly-Through Animation
• Next Steps
2

• The S Concourse Evolution project (SCE) is a part of Upgrade SEA
• Collaboration from project team happening amongst SEA departments as
well as External Relations, Customer Experience, etc.
• Updates will be communicated pre-construction with media moments and
tours, social media, and information on website project page.
• Working with External Relations on drafting a communications plans as we
move forward. This includes ongoing information to external audiences on
project information and opportunities.
3

3

Program Purpose & Objectives
• SEA S Concourse renovation, renewal, and upgrade of 50-year-old facility
• Upgrades the facility to meet current seismic, structural, and building
codes
• Repurposes space vacated by the International Arrivals Facility (IAF)
• Elevates passenger experience through expanded dining, retail, and
amenities
• Provides improved level-of-service with larger boarding areas and
technologies
• Achieves LEED Silver certification with reduced emissions and energy use

4

Project Status
• Base Building currently in Design
- 90% Design deliverable on 11/6/26

• Multiple Early Works packages in Procurement and Permitting
• Facilitating projects:
- Completed: Cargo 3 Bus Parking & Cargo 6 Hardstand
- In Progress: Gate D6, 188th St Duct bank, Spot 99, Cargo 7 Hardstand

• Coordination for Nov 2026 Construction start

5

Funding & Requested Authorization
• Funding Sources
- Revenue Bonds
- $270 Federal Aviation Administration Grants
- No Local Tax Dollars

• Request Commission authorization for the Executive Director to
increase funding project authorization for S Concourse Evolution by
$1,100,000,000 for a total authorization of $1,400,000,000. This
authorization to provide project funding for all activities will provide
funding for all activities necessary to advance the program into 2029.
6

Commission Roadmap Update

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Construction Schedule

8

Building Levels
7

7 Mechanical Penthouse Level

6 Upper Concourse Level

6
5

5 Concourse Level

3

2

4

4 International Corridor Level
3 Ramp & Baggage Level
2 Amenities Level

1

1 STS Train Level

9

Current Design - STS Train Level

View facing South after exiting the train
10

Current Design - Concourse Level East

View facing East towards A Concourse
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Current Design - Concourse Level West

View facing West towards runways
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Current Design - Upper Concourse

View facing West towards runways
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Current Design - Northeast Exterior

14

Current Design - Southwest Exterior

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Fly-Through Animation Video

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Next Steps
•
•
•
•
•

Execute multiple MACC (maximum allowable construction costs) contracts
90% Design Deliverable November 2026
Construction start November 2026
Groundbreaking event Q1 2027
Future Commission Items
- Q1 2027 - Briefing
- Q1 2028 - Briefing & Action
• Action to increase funding for Phase 2 MACC

- Q1 2029 - Briefing
- Q1 2030 - Briefing & Action
• Action to increase funding for Phase 3 & 4, including Final MACC

17

Requested Authorization
• Request Commission authorization for the Executive Director
to increase funding project authorization for S Concourse
Evolution by $1,100,000,000 for a total authorization of
$1,400,000,000. This authorization to provide project
funding for all activities will provide funding for all activities
necessary to advance the program into 2029.

18

Questions

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