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Sea-Tac Names Hensel Phelps as GC/GM for $1.5B Concourse Improvement

Courtesy the Port of Seattle

The $1.5 Billion South Concourse Evolution project at Seattle-Tacoma International Airport, is moving forward with Hensel Phelps Construction Co. as the general contractor/construction manager. The Port of Seattle recently issued a notice of intent to award Hensel Phelps a preconstruction contract estimated at $8 million, with a maximum allowable construction cost contract of $900 million, records show.

The Port also enlisted AECOM last month to oversee design and engineering of the project, with HOK serving as the lead designer and Jacobs providing project management services. The anticipated end date for Construction to conclude is set for 2031.

According to the Port, the project will refurbish the airport's 350,000-square-foot South Concourse, originally constructed in 1973 and last expanded in 1984. The renovations will bring the facility up to current building code standards and include seismic retrofitting.

Additionally, unused areas that once housed Federal Inspection Services and Customs and Border Protection will be repurposed for passenger amenities. The concourse level will see improvements in walk-ability, and the penthouse level will be expanded to provide more lounge space.

Hensel Phelps has a history of working on several projects at Sea-Tac airport, including the $494 million North Satellite Modernization project completed in 2021. Additionally, they are currently involved in a $250 million progressive design-build North Main Terminal Redevelopment project for Alaska Airlines, scheduled for completion in January 2025.

To promote diversity and inclusion, the Port has set a 2% disadvantaged business enterprise participation goal for this project, which is also subject to a project labor agreement.

Read full story on Engineering New Record

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