The wood used to make the roof came from trees that were downed in the 1980 eruption of Mount St. Helens . ( The Superior Dome in Marquette , Michigan , is a larger-diameter geodesic dome at , but is high and seats a maximum of 16,000 . ) Unlike most other arenas of its size , the arena contains little in the way of fixed seating , so as to maximize the flexibility of the seating arrangements and of the shape of the playing field . It can host American football , albeit with seating reduced to 10,000
1980 eruption of Mount St. Helens
1980 eruption of Mount St. Helens
Tacoma Dome