Sinkhole on Upper West Side in Manhattan, New York

August 17, 2011 local Uilamson Kirk says he first noticed the failure on Friday. Since then, it has expanded to 3.5 meters in diameter and 6.5 meters deep. Causes of unknown violations of underground utilities have been identified. People are worried and asked city officials to deal with the causes, as this is not the first time, reports newyork.cbslocal.com

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