The Environmental Protection Agency`s National Headquarters Project encompasses the design of the Agency`s 1.4 million-sf complex in Washington, D.C.`s historic Federal Triangle District. Located on Pennsylvania Avenue, midway between the White House and the US Capital, EPA`s high-profile National Headquarters was the nation's first significant federal office development to apply sustainable design principles. The new headquarters consolidation project began in August of 1995. The initial stage, 200,000 sf in the Ronald Reagan Building, was designed in 1995/96 and completed/occupied in July 1997. Design work in the Ariel Rios, Interstate Commerce Commission and United States Customs Services buildings followed.