Discovery Gas Pipeline System

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Gas Pipelines in USA

Williams Gas Pipelines

Pipeline News

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Summary Information

  • Source: Offshore
  • Destination: Larose natural gas processing plant, Louisiana
  • Ownership: Williams
  • Website:
  • Length: kilometres (150 miles)
  • Capacity: per day
  • Status: Operating


  • The Discovery system, which includes an offshore natural gas gathering system, as well as the Larose Gas Processing Plant and Paradis fractionation facility.
  • The pipeline has a 30-inch mainline and an 18-inch lateral
  • It serves South Timbalier, Grand Isle, Ewing Bank, Green Canyon and Mississippi Canyon areas offshore Louisiana
  • Keathley Canyon Connector Project:
    • A 20-inch diameter, 215-mile subsea natural gas gathering pipeline for production from the Keathley Canyon, Walker Ridge and Green Canyon areas in the central deepwater Gulf of Mexico

Related Oil and Gas Fields


  • Saipem: T&I for Keathley Canyon Pipeline project


  • 1997 - MAPCO Joins Texaco as partner of the project
  • 1997 - FERC grants permission to build pipeline
  • 1997 - Pipeline completed
  • 2002 - Duke Energy acquired the pipeline
  • 2005 - Expansion project completed
  • 2008 - The pipeline was damaged in hurricane Ike
  • 2012 - Keathley Canyon Connector Project launched
  • 2015 - First gas flows on Keathley Canyon extension

Other Information

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  1. Saipem Pipeline References
  2. EIA Natural Gas Pipeline Projects
  3. MAPCO Joins Texaco in Gulf of Mexico Natural Gas Pipeline Project
  4. Williams Partners L.P. Announces Return to Service of Discovery Mainline
  5. Texaco and MAPCO Receive FERC Approval for Construction of the Discovery Pipeline
  6. ChevronTexaco Closes Sale Of Discovery Pipeline System To Duke Energy Field Services
  7. New Long-Term Gathering, Processing, Transportation Agreements for Lucius, Hadrian South Fields Signed in Support of New Project
  8. Williams and DCP Midstream Partners Announce First Gas from Ultra-Deepwater Gulf of Mexico Pipeline
  9. Technip awarded pipeline installation contract in the Gulf of Mexico

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