Expansion Projects

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Constitution Pipeline

The Constitution Pipeline has been designed to consist of a new 125-mile pipeline with a capacity to transport 650,000 dekatherms of natural gas per day linking the Marcellus Shale with markets in New York and New England.

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Gateway Expansion Project

Transco pipeline expansion to provide additional service to natural gas consumers in New Jersey and New York in time for the 2020/2021 winter heating season.

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Gulf Connector Expansion Project

The Gulf Connector Expansion Project is a 475,000 dekatherm per day expansion of the Transco pipeline system in Texas and Louisiana to connect U.S. natural gas supplies with global liquefied natural gas (LNG) markets.

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Kalama Lateral Project

Northwest Innovation Works (NWIW) and Williams’ Northwest Pipeline have signed a pre-construction agreement for Northwest to construct a three-mile, 24-inch diameter natural gas pipeline and related facilities extending from Northwest’s mainline to NWIW’s proposed methanol production facility planned for the Port of Kalama – all located in Cowlitz County, Washington.

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Leidy South Expansion Project

Expansion of Williams’ existing Pennsylvania energy infrastructure to transport 582,400 dekatherms of natural gas supply per day from northern and western Pennsylvania in time for the 2021-22 winter heating season.

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North Seattle Lateral Upgrade Project

To meet the growing demand for natural gas in the North Seattle market area, Northwest has proposed the North Seattle Lateral Upgrade Project (Project) located in Snohomish County in the state of Washington. Northwest has executed firm agreements with Puget Sound Energy (PSE) for the project to expand the delivery capabilities of Northwest Pipeline’s North Seattle Lateral, which serves PSE customers. PSE operates Washington’s largest natural gas distribution system serving nearly 800,000 gas customers in six counties, approximately 25 percent of those are in north King and south Snohomish Counties.

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Northeast Supply Enhancement

Williams is developing the Northeast Supply Enhancement project to expand the existing Transco natural gas pipeline system by the 2020 winter heating season to provide important gas supply that will help the City reach its clean air goals.

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Rivervale South to Market

The Rivervale South to Market project is a Transco expansion to provide additional service to natural gas consumers in New Jersey and New York City in time for the 2019/2020 winter heating season.

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Southeastern Trail Expansion Project

The Southeastern Trail Expansion is designed to provide additional reliable service to utility and local distribution companies located in Virginia, North Carolina, South Carolina and Georgia by winter 2020.

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