OFFUTT AIR FORCE BASE, Neb. (AP) — Military officials say 4,000 feet of mold-infested ductwork has been removed from the U.S. Strategic Command’s new headquarters at Offutt Air Force Base.

The Omaha World-Herald (http://bit.ly/1YRTNCN ) reports that earlier construction glitches and the mold problems have extended the $1.2 billion project by 11 months and potentially “tens of millions” of dollars.

Col. John Henderson, commander of the U.S. Army Corps of Engineers Omaha District, says the building is scheduled for occupancy in October 2017. It was originally expected to be ready at the end of 2016.

Last September, the corps’ quality-assurance inspectors found the mold in the insulation lining some ducts and temporarily paused installing parts of the heating and cooling system. Engineers determined mold was located in about 7 percent of the building’s ductwork.