December 1979: Construction begins at downtown Minneapolis site.
January 1980: Bulldozers encounter 250,000-pound piece of granite. It's moved to Plymouth and dubbed "Plymouth Rock."
October 1981: Dome inflated for first time.
November 1981: Dome roof collapses under 10 inches of new snow.
April 1982: Stadium construction fully completed. The Twins play their first game there April 6.
December 1982: Dome roof falls after snow slides against large snow-removal bucket. The bucket, attached to a crane, twists and tears 3-foot gash that grows.
April 1983: Wet, heavy snow deflates roof; four-day repair results in cancellation of baseball game.
1985: Dome hosts baseball's All-Star Game.
