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Transco's Northeast Supply Enhancement project gets positive draft review

Transcontinental Gas Pipe Line Co. LLC received a positive draft environmental impact statement from Federal Energy Regulatory Commission staff for a natural gas expansion project that would deliver up to an additional 400,000 Dth/d to New York City area customers.

In the March 23 review, staff at the FERC Office of Energy Projects said construction and operation of the Northeast Supply Enhancement project would result in some adverse environmental impacts. However, the impacts would be either temporary or reduced to less-than-significant levels with recommended mitigation measures, staff said.

"The project area has been substantially impacted by human activity," staff said.

The project would consist of 10.2 miles of 42-inch-diameter pipeline loop in Lancaster County, Pa.; 3.4 miles of 26-inch-diameter pipeline loop in Middlesex County, N.J.; 23.5 miles of 26-inch-diameter loop in Middlesex and Monmouth counties in New Jersey and Queens and Richmond counties in New York; modification of a compressor station in Chester County, Pa.; a new compressor station in Somerset County, N.J.; and appurtenant facilities. The project would expand Transco's onshore interstate gas transmission system in Pennsylvania and New Jersey and its offshore natural gas transmission system in New Jersey and New York.

FERC staff observed that the loop in Middlesex County and 97% of the loop in Lancaster County would be collocated with existing Transco facilities.

The U.S. Environmental Protection Agency, the U.S. Army Corps of Engineers and New York City contributed to the report.

Transco, a Williams Partners LP subsidiary, estimated it would begin construction on the project in early 2019, which will allow it time to place the project into service by Dec. 1, 2019. The project would deliver all the incremental firm transportation capacity to two National Grid USA companies, which would provide New York City residential and commercial customers with gas for the 2019 and 2020 heating season.

Transco applied for the project on March 27, 2017, saying it would support gas price stability and reduce the potential for supply disruptions to National Grid. (FERC docket CP17-101)

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