The extension of the Silver Line to Dulles and Loudoun County was in jeopardy until July 3, 2012, when the Loudoun County Board of Supervisors voted 5 to 4 to extend the line to Dulles Airport and into the county. On April 25, 2013, the Phase II contract was issued at a cost of $1.177 billion. On August 20, 2014, the United States Department of Transportation announced that Phase II would be funded with a $1.28 billion Transportation Infrastructure Financial Innovation Act (TIFIA) loan. This delivers part of an approximately $1.87 billion combined commitment of TIFIA loans for Phase II, which represents the largest TIFIA assistance for a single project in the program's history.