Expansion Projects

Bluestem Pipeline

  • Kansas
  • Oklahoma

Originating in Conway, Kansas, the Bluestem Pipeline has been designed to transport 120,000 barrels-per-day (bpd) of natural gas liquids (NGLs), expandable to 225,000 (bpd).

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Constitution Pipeline

  • New York
  • Pennsylvania

Approved by the Federal Energy Regulatory Commission in December 2014, the Constitution Pipeline is a new 30-inch, approximately 125-mile pipeline with a capacity to transport 650,000 dekatherms of natural gas per day.

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Gateway Expansion Project

  • New Jersey

The Gateway Expansion Project has been designed to provide up to 65,000 dekatherms per day of natural gas transportation service to northeastern consumers.

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Hillabee Expansion Project

  • Alabama

The Hillabee Expansion Project is an expansion of the existing Transco pipeline’s capacity in Alabama to supply natural gas to the Sabal Trail pipeline.

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Kalama Lateral Project

  • Washington

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.

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Leidy South Expansion Project

  • Pennsylvania

The Leidy South Project is a proposed expansion of Williams’ existing Pennsylvania energy infrastructure designed to connect robust supplies of natural gas in northern and western Pennsylvania with growing demand centers along the Atlantic Seaboard.

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North Seattle Lateral Project

  • Washington

Northwest Pipeline LLC (Northwest) is one of three interstate natural gas pipelines operated by The Williams Companies.

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Northeast Supply Enhancement

  • New Jersey
  • New York

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.

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Regional Energy Access

  • New Jersey
  • Pennsylvania

Williams is developing the Regional Energy Access expansion to enhance existing energy infrastructure and increase Northeast consumer access to clean, affordable natural gas.

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Southeastern Trail Expansion

  • Virginia

The Southeastern Trail Expansion (SET) is an expansion of the Transco pipeline system designed to provide additional pipeline capacity to serve markets in the Mid-Atlantic and Southeastern states by November 2020.

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Landowners & Developers

We’re committed to honoring the trust and respect we’ve established with our landowners and developers. We take extra steps to ensure those near our pipelines can take part in the planning process.