High Island Offshore Gas Pipeline System

From Global Energy Monitor
This article is part of the Global Fossil Infrastructure Tracker, a project of Global Energy Monitor.

High Island Offshore Gas Pipeline System is an operating natural gas pipeline.[1]


The pipeline runs from gas fields located in the Galveston, Garden Banks, West Cameron and East Breaks areas of the Gulf of Mexico to a junction platform in West Cameron Block 167.[2]

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Project Details

  • Operator: Genesis Energy
  • Capacity: 1.8 billion cubic feet per day
  • Length: 287 miles / 462 km
  • Diameter: 30, 36, 42 inches[3]
  • Status: Operating
  • Start Year: 1978
  • Cost: $353 million[4]


In September 1975, affiliates of American Natural Gas Co., United Gas Pipe Line Co., Texas Gas Transmission Co., Natural Gas Pipeline Co. of America, and Transco announced plans to build a 203-mile pipeline network to bring gas reserves discovered in the High Island area offshore Texas into onshore markets, one of the largest natural gas pipeline systems in the Gulf of Mexico. Construction of the project which began in August 1976 was completed in 1978 and the pipeline was placed in service.[4]

The Michigan-Wisconsin Pipeline Co., a subsidiary of American Natural Gas Co., served as the operator of the pipeline when it began operations.[4] Enterprise Products acquired the pipeline from GulfTerra in 2008.[5][6] Genesis acquired the pipeline in July 2015 from Enterprise for $1.5 billion.[6][7][8]

The High Island Offshore Gas Pipeline System (HIOS) is owned and operated by Genesis Energy.[9] In November 2015 Genesis announced that it had sought permission from FERC to repurpose HIOS to send onshore gas to the proposed Delfin LNG deep water export terminal, while sending gas that had been flowing through HIOS through Genesis's Stingray Pipeline.[10] In September 2017 FERC approved this request on the grounds that HIOS’s gathering facilities have "the capacity to deliver its currently transported volumes of gas to Stingray Pipeline, and that Stingray Pipeline’s pressure will permit it to accept and transport the gas without causing operational problems."[11]

Certain portions of the pipeline are used for the gathering natural gas, while others are used as transmission pipelines, for instance, HIOS pipeline segment connecting the UTOS is a transmission line.[5] An FERC order determining the jurisdictional status of the HIOS stated:

“the pipeline facilities located in and upstream of HIA Block A-264, except for the compression-related facilities located in HIA Block A-264, are gathering facilities exempt from the Commission’s jurisdiction pursuant to NGA section 1(b)... the HIA Block A-264 compression facilities and 66-mile HIOS mainline are “jurisdictional transmission facilities” under section 1(b) of the NGA.11"[5]


In June 2015 the Center for Biological Diversity submitted a Motion To Intervene with FERC against the Delfin FLNG facility that would be supplied by HIOS. The motion states: "The Center, on behalf of its members, strongly believes that the Project’s construction and operation, including exporting U.S. natural gas abroad, is not in the “public interest” because it will: (1) increase natural gas drilling in the United States, including the use of dangerous, controversial, and inadequately-regulated onshore and offshore hydraulic fracturing or “fracking” methods that contaminate water, degrade habitat, pollute the air, and require huge quantities of water; (2) harm wildlife and habitat and diminish air and water quality; (3) increase global warming due to emissions from wells, the energy intensive process of liquefying natural gas, and the ultimate use of the product; and (4) cause an increase in domestic gas prices for American homeowners. C.f. 18 C.F.R. § 153.7(c). Our members will be directly affected by the construction and operation of the Project."[12]

Articles and resources


  1. High Island Offshore Gas Pipeline System, Wikipedia, accessed January 2018
  2. Gulfterra Energy Partners SEC Form S-1, SEC, Aug. 26, 1999
  3. Ewing, R C (1977/01/00). "HIGH ISLAND OFFSHORE SYSTEM'S PIPELINE NETWORK UNDER WAY IN GULF". Oil and Gas Journal. 75 (2). ISSN 0030-1388. {{cite journal}}: Check date values in: |date= (help)
  4. 4.0 4.1 4.2 "High Island Offshore System brought several 'firsts' to pipelining in the Gulf of Mexico". Offshore Magazine. 02 March, 2018. Retrieved 24 August, 2023. {{cite web}}: Check date values in: |access-date= and |date= (help)CS1 maint: url-status (link)
  5. 5.0 5.1 5.2 "Offshore gathering and transmission, new interpretation". 08 March, 2011. Retrieved 24 August, 2023. {{cite web}}: Check date values in: |access-date= and |date= (help)CS1 maint: url-status (link)
  6. 6.0 6.1 "High Island Offshore Natural Gas Pipeline System - A Barrel Full". abarrelfull.wikidot.com. Retrieved 2023-08-24.
  7. "Our History - Enterprise Products". www.enterpriseproducts.com. Retrieved 2023-08-24.
  8. "Genesis Energy, L.P. Enters into Agreement to Acquire Enterprise Offshore Pipeline and Services Business". Business Wire. 16 July, 2015. Retrieved 24 August, 2023. {{cite web}}: Check date values in: |access-date= and |date= (help)CS1 maint: url-status (link)
  9. HIGH ISLAND OFFSHORE SYSTEM (“HIOS”), Genesis Energy, accessed January 2018
  10. Offshore pipeline plans to serve Delfin LNG Argus Media, Nov. 25, 2015
  12. Center For Biological Diversity, Motion To Intervene, Docket No. CP15-490-000, FERC, Jun. 11, 2015

Related GEM.wiki articles

External resources

External articles

Wikipedia also has an article on the High Island Offshore Pipeline System (High Island Offshore System). This article may use content from the Wikipedia article under the terms of the Creative Commons Attribution-ShareAlike 3.0 Unported License].