Federal Triangle is an island platformed Washington Metro station in Downtown Washington, D.C., United States. The station was opened on July 1, 1977, and is operated by the Washington Metropolitan Area Transit Authority (WMATA). Providing service for the Blue, Orange, and Silver Lines, the station's entrance is beneath the William Jefferson Clinton Federal Building. On January 13, 1982, an eastbound Metro train on the Orange Line derailed just east of the station resulting in three fatalities, the first fatalities in the system's history.