Sea-Tac's North Satellite terminal was renovated and expanded in close coordination with the Port of Seattle and Alaska Airlines, who is the terminal’s sole tenant. The expansion modernized and expanded the North Satellite from 12 to 20 gates. The terminal includes improved hold rooms, larger restroom facilities, operations spaces and improvements to circulation and baggage handling systems.
TLC is performing modifications and expansion of the airport-wide central PCA system that they recently completed at Sea-Tac to accommodate the phased expansion of the North Satellite. The piping was originally sized to accommodate this expansion, however, some of it must be carefully reworked to facilitate the structural seismic and architectural enhancements being performed on the existing building.