Item No.

11a_supp

Date of Meeting

April 28, 2026

S Concourse Evolution (SCE)
Program Update

Background
• The SCE Project is a critical infrastructure renewal effort at SEA, addressing the 53-year-old
facility's seismic, structural, and code compliance needs while enhancing the passenger
experience. SCE project will renew this important regional facility through two main
objectives:
o Extend the useful life and bring the facility up to current code
including structural and seismic upgrades
o Re-purpose space left vacant by services relocated to the
International Arrivals Facility (IAF) and enhance the passenger
experience by increasing amenities, expanding dining and
retail (ADR) opportunities, and elevating the level of service.

2

Facilitating Projects
• Convert existing parking area at Cargo 3 for GSE Storage
• Improve existing Cargo 6 location to allow for Passenger Operations
• Convert existing Gate D6 from a bussing gate back to a Passenger Loading Bridge
• Construct duct bank from Cargo 7 to Generator Yard and across 188th St to S Main Substation
188th St.
Ductbank

Cargo 6

SCE - Base
Building

Cargo 3
GSE
Parking

Gate D6
Conversion

3

Facilitating Projects - Active Construction
Cargo 3

Cargo 6
Gate D6

4

Supporting Project - Interim S Annex

Site Map

View looking South
5

Southwest Perspective

6

Northeast Perspective

North Perspective

7

Concourse & Upper Concourse View looking East

8

Circulation from STS Train level
to Concourse

9

Concourse Holdroom

10

Sustainability Status
• 60% Sustainable Design Strategies (SDS) review has been completed
- Tracking:
• 12% reduction in annual energy consumption
• 50% reduction in annual operational carbon emissions
• 25% reduction in embodied carbon emissions
• 23% reduction in annual potable water consumption

- Equity inclusions:
• Food donation center
• Employee break room

• Pursuing the United States Green Building Council's (USGBC) Leadership in Energy
and Environmental Design (LEED) Silver Certification (minimum)

11

Budget/Schedule Status
• Project schedule improved to 7 years and 10 months, with
substantial completion 4Q 2034
o Previous 30% schedule was 9 years and 4 months, with completion 1Q 2036

• Program budget established at ~$2.5B

o Reduced from 30% estimate range of $2.9 - $3.3B

12

Next Steps

Note: Action items subject to change
13

Questions?

14

Thank you!

15