- The Seattle Convention Center (SCC), formerly the Washington State Convention Center (WSCC), is a convention center in Seattle, Washington, United States. It consists of two buildings in Downtown Seattle with exhibition halls and meeting rooms: Arch along Pike Street and Summit on the north side of Pine Street. The former straddles Interstate 5 and connects with Freeway Park. The convention center was planned in the late 1970s and funded through $90 million in bonds issued by the state legislature.