Interstate 44 cuts through downtown St. Louis, four lanes of asphalt, the city center on one side, the Mississippi River on the other. On a sweltering weekend last July, construction crews shut down the highway where it dips 20 feet below ground level. A massive crane wheeled onto the roadbed. One by one, the crane swung 40 huge girders into place, 100-foot-long steel ribs spanning the highway like fingers reaching out from downtown to the water below. The girders form the foundation of what will be part of a resplendent park.
Image: http://www.popularmechanics.com
