A partial implosion of the Silverdome has failed to bring down the upper section of the Detroit Lions' former home.
Demolition company Adamo says that Sunday morning's blasts in Pontiac, Mich., did weaken the Silverdome and it could still fall, but it is unclear when that might happen.
Rick Cuppetilli, executive vice-president with Adamo, says that 10 per cent of the explosive charges failed to detonate due to wiring issues that crews are investigating.
Cuppetilli says that unless gravity causes the building to fall on its own, excavators will start taking down the structure this week.
The Lions played in suburban Detroit from 1975 through 2001. The Silverdome also was the home of the NBA's Detroit Pistons and hosted the Super Bowl in 1982.
