After spending billions to renovate three aging terminals, Dallas/Fort Worth Airport is now turning its attention to runways, taxiways and other parts of the airfield that need an expensive facelift.

DFW Airport CEO Sean Donohue recently told a congressional committee that the airport, which opened in 1974, faces $5 billion to $10 billion in new capital infrastructure projects.

“We have four runways that are 40 years old. We have roadways and bridges that are 40 years old,” Donohue said in an interview with the Star-Telegram. “When you look at our airfield needs, that’s several billion right there.”

While the airfield is still safe by government standards, airport executives know that the concrete and pavement of its runways and taxiways are reaching the end of their expected lifespan. Earlier this year, the airport’s staff began testing airfield pavement to determine how many layers of runway will need to be rebuilt.

Fort Worth Mayor Betsy Price said the airport board hasn’t yet received a full presentation on which runways and infrastructure improvements need to be done first. But she said she supports committing the money to make needed improvements.

“You don’t want infrastructure that’s crumbling and not going to be up to the quality you expect from this airport,” said Price, noting that DFW was recently awarded the best large airport in North America for customer service in 2016.

Read more here at our media partners at the Star-Telegram