The $150 million first phase of Spokane International Airport’s Terminal Remodeling & Expansion, or TREX, project is on track to be completed in 2025, airport CEO Larry Krauter says.

Construction of the first phase, which consists of a 144,000-square-foot expansion of Concourse C, kicked off in October 2022.

Spokane-based Garco Construction Inc. and Sparks, Nevada-based Q&D Construction LLC make up the general contractor-construction management team.

Part of the first phase includes adding three new gates to the west side of Concourse C. That portion of the project is expected to be completed this summer.

“We will move Alaska Airlines down to this new three-gate area,” Krauter says.

Construction then will shift to the east side of the concourse, where the existing ground boarding gates being replaced with three new gates. That portion is expected to be completed in June 2025, Krauter says.

Future phases of the TREX project are expected to include construction of a central hall facility, which will have a centralized security checkpoint and a post-security hallway that connects the A, B, and C concourses, as well as a consolidated baggage claim and new operations center. Future work also will involve improvements to the A and B concourses and relocation of the airport’s rental car facility.

Separate from the TREX project, the airport also is planning a roughly $12 million fuel facility modernization project.

That project is still going through the design phase, and no starting date has been determined, Krauter says.

Kansas City, Missouri-based Burns & McDonnell Engineering Co. Inc. is listed on the permit application as the engineer for the fuel facility project. Permit information shows that work on that facility, which will be located to the northeast of the airport’s terminal building, will include improvements to the automated gauging at the three existing tanks, upgrades to controls, and heat dissipation and an air venting replacement.

A $16 million office building west of the airport concourse building also has been proposed, as previously reported by the Journal of Business.

That project, if it moves forward, will consist of a 46,000-square-foot office building to be located on about 3.6 acres of airport property at 9000 W. Airport Drive.

“It’s still rolling through the design process,” Krauter says,

The project team includes Spokane-based contractor Bouten Construction Co. and the Spokane office of construction manager Turner & Townsend Heery LLC, preliminary application information states.

The Spokane offices of Ardurra Group Inc., GeoEngineers Inc., and DCI Engineers are providing traffic, geotechnical, and civil and structural engineering services, respectively.