Leah Hogsten | The Salt Lake Tribune Over 1,800 tradesmen are working on the new Salt Lake City International Airport expansion project, Monday, Oct. 22, 2018. The first phase construction of the $3.6 billion project is due to open in 700 days. Nearing completion is the new concourse for aircraft gates, an enclosed terminal, the steel skeleton of a new "gateway" building, a five-story parking garage and elevated roadways.