The new history center will include a 15,000-square-foot main exhibit gallery, a 2,000-square-foot gallery for changing exhibits and a lobby that provides 3,000 to 4,000 square feet for event space. The main exhibit gallery will take up most of the first floor of the steam plant, but portions of the gallery extend two stories high. The back half of the building will be used for office space and the center’s new library and archives.