Delta A12 Passenger Boarding Bridge Expansion
Delta A12 Passenger Boarding Bridge Expansion / SeaTacWA
Expanding Horizons: Delta's Commitment to Seamless Travel at SEA

As airport passenger volumes continue to increase at SEATAC, new accomodations are underway to make existing terminals more accessible to wide-body international jets. Following a series of changes and upgrades made to Concourse A and a gleaming new International Arrivals experience, Delta engaged Mortenson to modify gate A-12 to accomodate newer, wide-body aircraft, increasing the ports overall capacity for larger jets to be parked simultaneously within the terminal. The project, excuted Design-Build with architect Corgan associates, involved the relocation of an existing jetbridge to the new A-12 location, the addition of a second jetbridge, and implementation of a gate desk within the terminal. With the surrounding gates being primarily used by Delta Airlines, an additional Delta concierge desk was placed to support passengers. Mortenson engaged with AERO as a design-build partner to assist with procurement.

In order to complete the project, a new point of use preconditioned air unit, ground power unit equipment, and potable water cabinet were added. All demolition included proper off-site disposal and removal of glycol. The replacement for the gate included standardizing controls, senors, hyrdraulics , motors, electrical functions and security access controls. Prior to becoming operational, the gate underwent significant testing for readiness, acceptance and gate fit. The Delta A12 project was executed in concert with a series of significant airport enhancements and upgrades. More information about our work at Seattle Tacoma International Airport can be found in both Aviation Pros as well as Civil and Structural Engineering Magazine.

Facts And Figures

2 jetways (one relocated, one new)

Supports wide-body international jets

Interior concourse boarding gate renovation

Delta concierge desk included

Delivery Methods


The Team


Corgan Associates