Offshore Natural Gas Pipelines

Enterprise owns or has an interest in approximately 1,280 miles of offshore natural gas pipelines strategically located to serve production areas including some of the most active drilling and development regions in the northern Gulf of Mexico, Texas, Louisiana, Mississippi and Alabama.

Our offshore Gulf of Mexico pipelines provide for the gathering and transportation of natural gas or crude oil. Typically, these systems receive natural gas from production facilities and other pipelines through system interconnects and transport natural gas to various downstream pipelines, including major interstate transportation pipelines that access multiple markets in the eastern half of the United States. In general, these pipelines generate revenue based on transportation fees charged per unit of volume (typically in MMBtus of natural gas or per barrel of crude oil) gathered or transported multiplied by the volume delivered. These agreements are often long-term in nature, often involving life-of-reserve commitments with firm and interruptible fees.

Our offshore platforms are critical components of the energy-related infrastructure in the Gulf of Mexico and support drilling and producing operations, playing a key role in the development of offshore crude oil and natural gas reserves. Revenues from our offshore platform services generally consist of demand fees and commodity charges. Demand fees are charged to a customer regardless of the volume the customer actually delivers to the platform. Revenues from commodity charges are based on a fixed-fee per unit of volume delivered to the platform (generally per MMcf of natural gas or per barrel of crude oil) multiplied by the total volume of each product delivered.

Asset Descriptions

Offshore Natural Gas Pipelines
Facility Ownership Interest Miles Approximate Net Capacity (MMcf/d) Function
Independence Trail 100% 135 1,000 Offshore natural gas pipeline that transports natural gas from the Independence Hub platform to Tennessee Gas Pipeline in the West Delta area of the Gulf of Mexico.
Viosca Knoll Gathering System 100% 137 600 Natural gas gathering system located off the coast of Louisiana that gathers production into several major interstate pipelines including Tennessee Gas, Columbia Gulf, Southern Natural, Transco, Dauphin Island and Destin.
High Island Offshore System (HIOS) 100% 287 500 FERC-regulated offshore natural gas transmission system that transports production from fields in the Western Gulf of Mexico to numerous downstream pipelines off the coast of Louisiana including ANR and Tennessee Gas Pipeline, UTOS and Stingray.
Falcon Natural Gas Pipeline 100% 14 400 Natural gas gathering line located off the Texas coast that delivers gas processed on the Falcon Nest platform into the Central Texas Gathering System.
Green Canyon Laterals Various(1) 35 213 A group of 11 pipeline laterals (which are extensions of natural gas pipelines) located in the Gulf of Mexico offshore Texas and Louisiana, which deliver to numerous downstream pipelines including the HIOS system. 
Anaconda Gathering System 100% 183 300 Offshore natural gas pipeline that connects the Marco Polo and Typhoon platforms in the Green Canyon area of the Gulf of Mexico to the ANR pipeline system.
Manta Ray Offshore Gathering System 25.7%(2) 237 205 Unregulated natural gas gathering lines that transports natural gas from producing fields located in Green Canyon, Southern Green Canyon, Ship Shoal, South Timbalier and Ewing Bank areas to numerous downstream pipelines.
Nautilus Pipeline System 25.7%(2) 101 154 FERC-regulated natural gas pipeline and related facilities that connect our Manta Ray Offshore Gathering System to our Neptune natural gas processing plant located in south Louisiana.
Nemo Pipeline 33.9%(3) 24 102 Offshore Louisiana natural gas gathering pipeline that transports natural gas from Green Canyon developments to our Manta Ray Offshore Gathering System.
VESCO Gathering System 13.1%(4) 125 65 Regulated natural gas gathering line located in south Louisiana that is an integral part of the natural gas processing operations of VESCO.
Total System 1,278 3,539
  1. We proportionately consolidate our undivided interests, which range from 2.7% to 75.0%, in 64 miles of the Green Canyon Lateral pipelines. The remainder of the laterals are wholly owned.
  2. Our ownership interests in the Manta Ray Offshore Gathering System and the Nautilus System are held indirectly through our equity method investment in Neptune Pipeline Company, L.L.C. ("Neptune").
  3. Our ownership interest in the Nemo Gathering System is held indirectly through our equity method investment in Nemo Gathering Company, LLC ("Nemo").
  4. Our ownership interest in the VESCO Gathering System is held indirectly through our equity method investment in VESCO. This system is integral to our natural gas processing operations; therefore, our equity method investment in VESCO is accounted for under our NGL Pipelines & Services business segment.

For more information on the assets, please refer to the most recent Form 10k or Quarterly Reports on Form 10-Q and other SEC filings.