A joint venture of Turner Construction Company and Flatiron Construction Corporation, both subsidiaries of construction services provider Hochtief, has been chosen by the City and County of Denver to lead a $700 million expansion of Denver International Airport in the US.

The project involves adding gates, concessions, runways and taxiways. It will add more than 530,000 ft2 to Concourse A and 91,000ft2 to Concourse B, reports World Construction Network.

The project will also involve the addition of 16 aircraft gates, two international nodes with provisions for three more, and 1,128,000 square yards of aircraft-rated pavement.

Work on the project is scheduled to begin in January 2018.

In last August, the Denver City Council had approved a $1.8 billion public-private partnership to redesign the Jeppesen Terminal at the airport.

Turner vice-president and general manager Aaron Wiebelhaus said: “Together with our partner Flatiron, we’re gearing up to streamline and enhance the passenger experience for the more than 58 million travellers who fly to, from, and through Denver every year.

“Airports help connect people to new places, communities, and experiences – they bring you to the world and the world to you.

“We look forward to delivering a beautiful facility that will encourage and facilitate that exploration.”

Flatiron’s central division vice-president Eric Taylor said: “We are proud to be part of the team expanding and continuing the growth of Denver International Airport.

“We are also glad to be partnering once more with our sister company, Turner, as their vertical construction experience is a strong complement to our heavy civil expertise.

“Our selection as a joint venture reflects our past shared success as well as the trust and confidence placed in us by the City and County of Denver.”