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Transco Project Would Add Capacity For National Grid by 2019

Transcontinental Gas Pipe Line Co. LLC (Transco) has asked FERC staff for permission to begin the prefiling review process for its proposed Northeast Supply Enhancement Project, which would expand the Transco system to serve additional needs of National Grid beginning with the 2019-2020 heating season.

Transco, a Williams pipeline, plans to place the project in service Sept. 15, 2019. It would be designed to provide 400,000 Dth/d of firm transportation from Transco's Compressor Station 195 in York County, PA, to the Rockaway Transfer Point, an existing interconnection between the Lower New York Bay Lateral and the Rockaway Delivery Lateral in New York State waters [PF16-5].

The project is fully subscribed. Transco said it has precedent agreements in place to provide 188,700 Dth/d of incremental firm service to The Brooklyn Union Gas Co. (d/b/a National Grid NY) and 211,300 Dth/d of incremental firm service to KeySpan Gas East Corp. (d/b/a National Grid).

Transco said it wants to start the pre-filing process by Monday (May 16). A draft of its first resource report and other documentation would likely be submitted to FERC in June, it said. A certificate filing for the project would likely follow in March 2017 with a request for Commission approval by May 2018.

Facilities being considered for the project are:

  • A 10-mile, 42-inch diameter loop of Mainline D in Lancaster County, PA;
  • An additional 21,000 hp electric-powered compressor unit at the existing Compressor Station 200 in Chester County, PA;
  • The new 32,000 hp Compressor Station 206 in Somerset County, NJ, near the Transco Mainline;
  • A 3.4-mile, 26-inch diameter loop of the Lower New York Bay Lateral from Compressor Station 207 downstream to the Morgan Metering and Regulating (M&R) Station in Middlesex County, NJ;
  • A 22-mile, 26-inch diameter loop of the Lower New York Bay Lateral from the Morgan M&R Station to the Rockaway Transfer Point in New York state waters (offshore); and
  • Appurtenant underground and aboveground facilities.

Transco's previously filed New York Bay Expansion Project would also serve National Grid (see Daily GPIJuly 10, 2015). Northeast Supply Enhancement would be in addition to the New York Bay project.

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