(Portland, OR) -- The 11-year remodeling project at Portland International Airport is complete. The more than two-billion-dollar project included seismic resilience, better passenger flow and a reduced carbon footprint. The nine-acre roof is made from mass timber that came from forests within 300 miles of the airport. There are more than 70 live trees and 75-hundred plants inside of the building. A total of 27 local retailers are available for travelers.