I can bet that a tear in the roof material is what caused the collapse. This is due to air escaping out of the dome. I have seen air bags inflate and lift huge loads of concrete which obviously weighs more than snow. Though with the size of the roof the snow could be comparable, but I see a loss of air which dropped air pressure inside allowed gravity to collapse the roof. I never used the place, but also think the place was a eye sore. At least the University is getting rent now hosting some of the athletics. This helps with the budget for UAA.