Passengers at Washington Dulles International Airport will undergo security checks in a new location starting Sept.15, as the airport plans to complete part of a long-awaited project by the end of the year.

The screening process will take place at a new permanent facility, and the old checkpoints will no longer be used, said Rob Yingling, a spokesman for the Metropolitan Washington Airports Authority. The new security mezzanine will be on the airfield side of the main terminal.