EPA program revisions and coordination memo, July 2003

NYC 9/11 Public Portal Document

Demolition of Damaged Buildings

NYCDDC was responsible for the Seven Buildings Comprising the WTC Complex demolition of the damaged WTC buildings and removal of the demolition debris. In addition to the WTC towers, WTC 3 collapsed from tower debris and WTC 7 also collapsed after burning tmeheeked-for approximately 7 hours. The remaining three buildings in the WTC Complex were all significantly seyereiy damaged. According to an EPA on-scene coordinator, all parts of the damaged buildings were considered in danger of collapse, although some areas were deemed accessible t'orafter inspections by structural engineers prior to their demolition. The following table summarizes the condition of the WTC buildings after September 11. i 4 Source: New York Times [Buildings identified in table 4-1.]

Table 4-1: Condition of WTC Buildings

Building Condition WTC 1 - North Tower Complete collapse WTC 2 - South Tower Complete collapse WTC 3 - Marriott Hotel Complete collapse WTC 4 - South Plaza Partial collapse WTC 5 - North Plaza Partial collapse WTC 6 - U.S. Customs Partial collapse WTC 7 Complete collapse Source: New York City DoB/DDC/Structural Engineers Association of New York Cooperative Buiiding Assessment, November 7, 2001.

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