Southeastern Trail Expansion


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. There project has been designed to provide additional reliable service to utility and local distribution companies located in Virginia, North Carolina, South Carolina and Georgia.


  • Reliability for existing customers’ critical long-term supply needs for the 2020-2021 heating season and beyond.
  • Cleaner air by shifting away from dirty coal or expensive oil to clean-burning natural gas.
  • Affordability for consumers with lower heating costs from increased natural gas usage.
  • Carefully designed to minimize environmental impacts by maximizing the use of existing energy infrastructure corridors.

The SET project involves modifications to existing Transco pipeline facilities along existing pipeline corridors. It will include the installation of:

  • 7.72 miles of 42-inch mainline loop (Southern/Manassas Loop) in Fauquier and Prince William Counties, Virginia.
  • Horsepower additions at existing compressor stations in Manassas, Va., Scottsville, Va. and Chatham, Virginia.
  • Piping and valve modifications on other existing facilities in South Carolina, Georgia and Louisiana to allow for bi-directional flow.

April 2018 – Filed 7(c) Application with FERC
August 2019 — Construction Starts
November 2020 — In-Service Date


General questions related to the project can be directed to

Media inquiries related to this project can be directed to