University of Michigan moves 700,000-pound Burr Oak
Story originally found on NPR.org
The University of Michigan moved a 250-year-old, 700,000-pound Burr Oak 500 feet this month.
As part of the Ross Building School’s expansion, the Tree Campus hired Environmental Design, one of the few companies that can do this, to move tree to the front of the building.
This summer long pipes were inserted under the 44-foot root ball. It was then wrapped in plastic and burlap. Large rubber bags were then inserted under the pipes. These bags were then slowly inflated in order to raise the tree up. The bags looked like large, thick versions of inner tubes.
After that the tree was slowly moved over the transporter, and the bags were deflated so the tree could be lowered onto the transporter. The transporter with the tree on it was then moved at approximately 1 mph until it reached its new location in front of the school, where it was lowered into the ground.
The project cost $400,000 and was paid for by philanthropist Stephen Ross’s $100 million donation for the business school’s expansion. (The building is being renamed in his honor.)