To make way for a new Metrodome stadium in Minneapolis, Volvo Construction Equipment has helped to demolish the old stadium in just four months.
Built in 1982, the Hubert H. Humphrey Metrodome in Minneapolis has had a glorious career, hosting many famous events including a Super Bowl, two World Series, a major league baseball All-Star game and two college Final Four basketball playoffs..
Located in downtown Minneapolis, the Metrodome was a concrete structure with a fiberglass fabric roof – self-supported with some help from air pressure. Thirty-six steel cables, each 3.5 inches in diameter, anchored the fabric in place from the top. Inside, the structure supported three seating levels, holding 64,000 people.
Frattalone Companies was contracted by Ames Construction – a subcontractor to Mortenson Construction, the project’s main contractor – to bring down the Metrodome in January this year. Ames has a $36-million contract with Mortenson for the project’s excavation and demolition work.
Bigger and better
A new and larger $975 million stadium is being built simultaneously with the demolition of the old stadium, which took just four months to bring down and remove the remains using Volvo Construction Equipment (Volvo CE) machines. In temperatures below minus 7oC (20oF), the work took place on the same site – so as one section of the Metrodome was demolished, foundation work for the new facility began.
“We cleaned the building out first, removing materials that could not be recycled or transported to landfill,” says Chris Niemand, Frattalone’s project manager. “It took about three weeks to remove a loading dock from the facility and while that was happening, crews prepared the ring beam for removal. Small controlled explosive charges were used to sever each of the cables from their anchors, and the fabric roof fell safely to the ground.”
Bringing down the entire structure with explosives was considered, but the Minnesota Sports Facilities Authority ruled it out because of the impact it could have on the surrounding community, including a hospital. For this demolition project, Frattalone bought a new Volvo EC480D-Series high-reach excavator and a selection of demolition attachments.
“The Volvo high reach excavator has been used for multiple projects since we started the demolition,” says Niemand. “We brought it in immediately once the building was emptied to help prepare for the mass demolition process. The excavator machine was able to pull down all the chairs and debris to field level. It was a concrete stadium so it would not have been easy to get up there and clean away all the old concrete.”
Frattalone’s other Volvo equipment consists of two A40 D-Series articulated haulers, two L110 E-Series wheel loaders, two L90 D-Series and E-Series wheel loaders, one L250 G-Series wheel loader, and two Volvo excavators – an EC240CL and an EC360BL. “I think Volvo’s loaders are second to none,” says Tony Frattalone, president of the company. “One of our L90 loaders has clocked 18,000 hours and our other L90 has clocked around 15,000 hours.”