Northeast Supply Enhancement


The Northeast Supply Enhancement Project addresses serious natural gas supply constraints affecting New York City and Long Island by providing 400,000 dekatherms per day of additional natural gas supply to National Grid – the largest distributor of natural gas in the northeastern United States — in time for the 2020/2021 winter heating season. The environmental benefits made possible by the project build upon the significant progress that New York City has made in emissions reductions, allowing for the annual displacement of 900,000 barrels of heating oil and a 200,000-ton reduction of CO2 emissions, in addition to reducing other local emissions such as smog, acid rain and particulates.


  • Grow economy. The design and construction of the Northeast Supply Enhancement project will generate approximately $327 million in additional economic activity (GDP) in Pennsylvania, New Jersey and New York.
  • Ensure reliability. The Transco pipeline provides more than half of the natural gas consumed in New York City and Long Island. This project will help ensure that a reliable source of natural gas supply is available to meet the region’s growing energy needs
  • Reduce emissions. The Northeast Supply Enhancement project will reduce CO2 emissions by 200,000 tons annually. The CO2 emission reductions are the equivalent of removing nearly 500,000 cars from the road.

  • Create jobs. The project will, directly and indirectly, generate 3,186 jobs during the construction period, resulting in an estimated $234 million in labor income.
  • Reduce bills. The residential and commercial heating conversions from fuel oil to natural gas made possible by the Northeast Supply Enhancement project has the potential to reduce heating bills by 65%.

Support the project and sign the petition.


The project will add energy infrastructure in Pennsylvania, New Jersey and New York, specifically adding a total of about 37 miles of new pipeline and new compression to the existing Transco pipeline system. The proposed facilities include:

  • 23.5 miles of 26-inch pipe in the New York Bay (offshore)
  • 3.4 of 26-inch pipe in Middlesex County, New Jersey (onshore)
  • 10.2 miles of 42-inch pipe in Lancaster County, Pennsylvania
  • A new compressor station in Somerset County, N.J.
  • Other existing compressor facility modifications

May 2016 – FERC pre-filing process began
March 27, 2017 – Williams filed a Certificate Application with FERC
January 25, 2019 – FERC issued final Environmental Impact Statement
May 3, 2019 – FERC issued a certificate of public convenience and necessity
Fall 2019 – Construction start
Winter 2020/21 – Project in-service


Questions related to the project can be directed to 713-215-2264 or