Boeing started construction on a new 367,000-square-foot facility in St. Louis that will build parts for the newest member of its 777 commercial airplanes family, the 777X. The plant will create about 700 new jobs. Construction should be complete in 2016, with work on 777X wing and empennage parts starting in 2017. The facility is an expansion of Boeing’s current tooling center at the site and will contain six autoclaves.

 Boeing’s St. Louis site, which marked its 75th anniversary this year, is renowned for military aircraft production. More than 12,000 fighter jets have been built there and the site is headquarters for the Boeing Defense, Space & Security business unit.

 Boeing selected its Everett, Wash., site earlier this year as the location for a new composite wing center for the 777X program. The company will perform fabrication and assembly of the 777X’s composite wing at this center.