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AUSTIN, TEXAS — HNTB, a Kansas City-based design-build firm focused on urban infrastructure projects, is underway on the renovation and expansion of Austin-Bergstrom International Airport. HTNB is working with global design firm Populous on the project, which will include updates to the existing Barbara Jordan terminal, a new below-grade passenger tunnel and a new Midfield Concourse with space for up to 30 gates. A tentative completion date for these pieces of the project was not disclosed.