WTC site damage assessment map, Sept 21, 2001

NYC 9/11 Public Portal Document

wastewater supply projects would be provided by the repaired ConEdison network and would not result in a significant demand consumed in the study area.

3.6.3.4 Energy

Although it is likely that the proposed new facilities constructed as part of the long-term redevelopment effort at the WTC would be more energy-efficient than the facilities they replace, a significant benefit to electrical resources is not anticipated. It may be that the electrical system will be upgraded during proposed projects although the existing supply system would be able to handle the additional loading. The existing electrical services are provided by ConEd and would be sufficient to handle the increased usage associated with the planned proposed action alternatives.

Environmental Impacts

No significant impacts to area electrical supplies are anticipated fi-om implementation of any of the proposed action alternatives.

3.6.3.5 Steam

Consolidated Edison (ConEd) provides steam for heating, hot water and air conditioning in lower Manhattan fi'om the Batteiy to 96*^ Street to 2,000 customers consisting of more than 100,000 commercial and residential establishments. The system has 105 miles of mains and services and 1,200 steam manholes. Five steam-generating plants located in Manhattan provide the steam. The peak winter send out is nearly 10 million pounds per hour. Steam would be used to heat the new facilities planned during the long-term redevelopment effort. The central steam production plant is located and has a rated capacity of.

Environmental Impacts

Based on the rated capacity of the steam plant, adequate capacity exists to provide the anticipated steam requirements. Thus, implementation of the proposed projects would not result in significant impacts to the NYC steam production capacity.

3.6.3.6 Natural Gas

ConEd provides natural gas to 350,000 customers in Manhattan. Of a total of 4,210 miles of gas mains, there are 1,470 miles of unprotected steel mains, 1,486 miles of cast iron maiitis, 876 miles of plastic mains, and 378 protected steel mains. Some natural gas lines were damaged during the WTC attack and will be repaired.

Environmental Impacts

Natural gas usage in the lower Manhattan area is not expected to change relative to pre­ disaster conditions. No impacts are expected.

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