High Quality Content by WIKIPEDIA articles! The Cumberland County Civic Center is a 6,733-seat multi-purpose arena, in Portland, Maine. Built in 1977, at a cost of $8 million, it is home to the Portland Pirates ice hockey team, various trade shows and the Maine Principals` Association high school basketball tournament. There are 6,733 permanent seats in the arena, and it seats up to 9,500 for concerts.