 In the 1990s, the airport was explored as a candidate for expansion into a regional airport to relieve Seattle–Tacoma International Airport.The plan was ultimately abandoned by 1996, as the Puget Sound Regional Council instead chose to construct a third runway at Seattle–Tacoma International Airport.Electric power in Arlington is provided by the Snohomish County Public Utility District (PUD), a consumer-owned public utility that purchases most of its electricity from the federal Bonneville Power Administration (BPA).