In New York City , the greatest number are in hilly sections of the Bronx and Upper Manhattan , where most of the 10 or so retaining wall collapses in the city over the past 100 years have occurred , according to news accounts dating as early as 1906 .
Upper Manhattan
New York City
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New York City
Upper Manhattan
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LOCATION
New York City
LOCATION
Bronx
LOCATION
Upper Manhattan