Gateway Expansion Project

Williams is pursuing an expansion of its Transco interstate natural gas pipeline to provide additional service to natural gas consumers in New Jersey and New York in time for the 2020/2021 winter heating season. The Gateway Expansion Project has been designed to provide up to 65,000 dekatherms per day of natural gas transportation service to northeastern consumers — enough natural gas to meet the daily needs of about 300,000 homes. Williams has executed agreements with PSEG Power and UGI Energy Services for firm transportation service under the Gateway Expansion Project.


Project Need

Natural gas demand in the Northeast continues to increase, in large part due to its abundance, environmental advantages and affordability when compared with other energy sources.  Clean-burning natural gas currently produces one-third of all electric generation and heats about half of all U.S. homes – and those numbers continue to climb.

PSEG is New Jersey’s largest provider of electric and gas service –serving 2.2 million electric customers and 1.8 million gas customers. UGI Energy Services supplies and markets natural gas, liquid fuels, and electricity to 40,000 customer locations across the Mid-Atlantic and Northeastern US.

The Transco pipeline delivers about half of the natural gas consumed in New Jersey and New York City. Because the existing Transco pipeline capacity is fully utilized, the Gateway Expansion Project allows additional natural gas volumes to be transported to northeastern consumers. An abundant, reliable supply of natural gas is critical to help reduce carbon emissions and provide the flexibility needed to support a growing renewables component in power generation.

Project Scope

The Gateway Expansion Project has been designed to minimize impacts to landowners and the environment by increasing the utilization of existing pipeline infrastructure. Virtually all of the project activities are within Transco’s existing rights of way and/or property boundaries.

The project will require the installation of additional electric horsepower at an existing Transco compressor station in Essex County, N.J., (Station 303) in addition to modifications to an existing Transco meter station in Essex County and the replacement of an existing Transco meter station in Passaic County, N.J.

Station 303 Horsepower Addition

Transco Station 303 is an existing electric motor driven compressor facility in Roseland, N.J. The Gateway Expansion project proposal would require adding a 27,500 horsepower electric motor driven compressor unit to the facility. This proposed horsepower addition will help minimize air emissions at the station and surrounding environment, and as a result will not require any federal, state, or local air quality permits.

Meter Station Modifications

Meter stations are used to measure the flow of gas from the transmission pipeline to the pipeline customer. As part of this project, Transco would replace components of the existing above-ground metering facility in Paterson, N.J., with new, state-of-the-art equipment and buildings. The majority of this work will be confined to the existing facility footprint.

The proposal also includes the installation of a new valve at the existing meter and regulating facility in Roseland, N.J.


The Transco pipeline has been safely operating in this area for decades, and the pipe in this area consists of both Class 3 and 4 pipe, which is the highest pipeline design class standard established by U.S. DOT code.  It is also important to note that Station 303’s horsepower addition will not result in an increase to the main pipeline’s current operating pressure. In addition, the pipe will continue to be monitored 24/7 and regularly tested to validate its integrity.


Station 303 utilizes an electric motor to drive the natural gas compressor units.  These motors use electricity to generate the necessary power for natural gas pipeline compression, and therefore do not generate air pollutant emissions at the station.


Although there are wetlands outside of Station 303, construction will be limited to our existing fence line and therefore will not have any direct impacts on existing wetlands.

Regulatory Process

Interstate natural gas pipelines are regulated by the Federal Energy Regulatory Commission (FERC). As such, FERC requires pipeline operators to obtain a federal Certificate of Public Convenience and Necessity, in addition to various state permits, before any pipeline facilities can be built.

Williams submitted an application to the FERC for the Gateway Expansion project on Nov. 15, 2017. The project was assigned Docket No. CP18-18-000. View the certificate application here.

On July 17, 2018, the FERC staff released its Environmental Assessment for the Gateway project, concluding that “approval of the proposed project, with appropriate mitigating measures, would not constitute a major federal action significantly affecting the quality of the human environment.”

Proposed Schedule

  • November 2017 – FERC filing
  • As early As Spring 2019 – Construction
  • Winter 2020 – In service

Contact Us

If you have any questions, feel free to contact us anytime.

Phone: 713-215-2264