November 20, 2012
Preventing Subway Floods with Giant Balloons
Henry Fountain, New York Times
With a few dull thuds, the one-ton bag of high-strength fabric tumbled from the wall of the mock subway tunnel and onto the floor. Then it began to grow.
As air flowed into it through a hose, the bundle inflated until it was crammed tight inside the 16-foot-diameter tunnel, looking like the filling in a giant concrete-and-steel cannoli.
TAGGED: Balloon, Flood