Posted Sep 24, 2008, 5:30 PM
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Join Date: Sep 2006
Location: Vancouver
Posts: 213
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NYC Trade Center dig exposes Ice Age landscape
NEW YORK - Crews excavating the World Trade Center site this summer for the foundations of a new skyscraper have uncovered features carved into the bedrock by glaciers about 20,000 years ago, including a 40-foot-deep pothole.
Exposing the solid rock beneath at the ground zero site in lower Manhattan is critical for supporting what will be Tower 4 of the new World Trade Center, being built by Silverstein Properties.
"You want to make sure you're not perching something on a ledge," said Anthony Pontecorvo, a supervising structural engineer at Mueser Rutledge Consulting Engineers, which is working on the project.
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