Natural gas transmission and midstream



As the world transitions to a lower-carbon energy future, natural gas will play a vital role—as a replacement fuel for coal in electricity generation, a low-carbon source of home heating, a lower-emission fuel for heavy-duty vehicles and large transportation fleets, and a complement to the growth of renewable energy.

In Enbridge’s natural gas business, we like to say that “we go where the lights are.” Our natural gas pipelines connect North America’s most prolific natural gas supply areas to major demand centers in the U.S. and Canada—and to liquefied natural gas (LNG) and Mexico export markets as well.

Unrivaled in the industry due to their scale, scope and connectivity, Enbridge’s natural gas transmission and midstream pipeline assets cover about 26,000 miles (41,850 kilometers) in 31 U.S. states, five Canadian provinces and offshore in the Gulf of Mexico. They stretch from the far northeast corner of British Columbia to the southern tip of Texas, across to Florida and up into New England and the Atlantic provinces. (See Enbridge’s natural gas transmission and midstream assets on our interactive map.)

Our natural gas transmission and midstream operations include:

  • The transportation of more than 18.9 Bcf (billions of cubic feet per day) of natural gas;
  • 3.1 Bcf/d of processing capacity; and
  • 159.3 Bcf of net working storage.

U.S. Transmission

Enbridge moves about 22 percent of the natural gas consumed in the United States. We are the largest natural gas supplier to New England, the Southeast and virtually all of Florida. Our transmission network is also webbed throughout the Gulf Coast. We are also one of the largest offshore natural gas transporters in the Gulf of Mexico. Enbridge’s major transmission pipeline systems include:

  • Algonquin Gas Transmission: Algonquin transports 3.12 Bcf/d of natural gas through 1,129 miles of pipeline in New England, New York and New Jersey
  • East Tennessee: With 1,525 miles of pipeline, East Tennessee can deliver 1.86 Bcf/d of gas per day to meet the growing energy demands of the Southeast and Mid-Atlantic. The system begins in Tennessee and extends to an area just south of Roanoke, Virginia
  • Gulfstream: An offshore pipeline, Gulfstream extends from southern Mobile County, Alabama, across the Gulf of Mexico into Florida, with the capacity to deliver 1.30 Bcf/d of natural gas to Florida. Gulfstream is jointly owned by Enbridge and Williams Partners
  • Maritimes & Northeast Pipeline: With 889 miles of pipeline (346 miles in the U.S.), Maritimes brings offshore, onshore and LNG-sourced natural gas from Atlantic Canada to North American markets. Maritimes extends from Nova Scotia into New Brunswick, Maine, New Hampshire, and Massachusetts
  • NEXUS Gas Transmission: NEXUS is a 36-inch-diameter, 256-mile interstate pipeline system delivering natural gas to markets in the U.S. Midwest (including Ohio, Michigan, and the Chicago area) and the Dawn Hub in Ontario. NEXUS is a 50/50 joint venture between Enbridge and DTE Energy
  • Ozark Gas Transmission: The 366-mile Ozark interstate natural gas transportation system extends from southeastern Oklahoma through Arkansas to southeastern Missouri
  • Sabal Trail: A joint venture with Spectra Energy Partners, NextEra Energy and Duke Energy, Sabal Trail is a new 515-mile interstate pipeline system delivering natural gas to the US southeast, and entered service in 2017
  • Southeast Supply Header (SESH): The 287-mile SESH links the onshore natural gas supply basins of east Texas and northern Louisiana to Southeast markets now predominantly served by offshore natural gas supplies from the Gulf of Mexico. It has 1.09 Bcf/d of capacity
  • Texas Eastern: With 9,096 miles of pipeline, Texas Eastern Transmission connects Texas and the Gulf Coast with high demand markets in the northeastern United States, supplying fuel for electric generation facilities and helping to meet peak-day demands. Texas Eastern can transport 11.69 Bcf/d of natural gas
  • Vector Pipeline: Enbridge has an ownership interest in 350-mile Vector Pipeline, which connects with Alliance Pipeline and other pipelines near Chicago, and delivers natural gas to local distribution and end-user customers in Illinois, Indiana, Michigan and Ontario

Offshore pipelines: As one of the largest gas transporters in the Gulf of Mexico, Enbridge has 11 active natural gas transmission and gathering pipelines—handling more than 40% of total offshore natural gas production, and more than 50% of deepwater natural gas production, in the Gulf. (Learn more about Enbridge’s offshore pipelines.)

U.S. Transmission Growth Projects: In addition to our existing pipelines, we have a robust portfolio of growth projects—including Valley Crossing, the largest gas export pipeline to Mexico due to come into service in 2018.

(Spectra Energy Partners, an Enbridge master limited partnership, owns interests in many of our U.S. pipelines and storage facilities. These assets are operated primarily by Enbridge.)

Canadian Gas Transmission and Midstream

Enbridge’s Western Canadian natural gas assets connect one of the most vital and vibrant natural gas supply sources in North America—the Western Canadian Sedimentary Basin—with growing North American markets. Our business in this region includes gathering, processing and transporting natural gas and natural gas liquids.

Enbridge’s Western Canadian gas transmission business consists of two major pipelines—the BC Pipeline and the Alliance Pipeline.

  • BC Pipeline: The 2,818-km (1,751-mile) BC Pipeline serves as the backbone for natural gas infrastructure development in British Columbia. Stretching from Fort Nelson to the Canada/US border, at Huntingdon-Sumas, the BC Pipeline transports about 60 percent of the natural gas produced in British Columbia, and supplies about 50 percent of natural gas demand in the American states of Washington, Oregon and Idaho. The BC Pipeline can transport 2.9 Bcf/d of natural gas, and consists of two systems—Transmission North (T-North) and Transmission South (T-South).
  • Alliance Pipeline: Stretching southeast from British Columbia across Canada, the 3,848-km (2,391-mile) Alliance Pipeline is a 1.6 Bcf/d wet gas pipeline that brings gas into the Aux Sable processing facility in Chicago. Enbridge owns 50 percent of Alliance and about 50 percent of Aux Sable.

Canadian growth projects: The BC Pipeline is in the midst of a multibillion dollar expansion program, driven by prolific natural gas supplies in the region. Expansions are underway at both the T-North and the T-South systems. These projects are all backed by long-term, reservation based contracts.

DCP Midstream

Headquartered in Denver, DCP Midstream is a 50-50 joint venture between Enbridge and Phillips 66. DCP Midstream is the largest producer of natural gas liquids (NGLs) and the largest natural gas processor in the United States, gathering and/or processing about 12 percent of U.S. gas supply. The DCP network includes 61 owned or operated plants and about 64,300 miles of gathering pipe.

DCP Midstream gathers, compresses, treats, processes, transports, stores, and sells natural gas. DCP Midstream also produces, fractionates, transports, stores and sells natural gas liquids; recovers and sells condensate; and transports, stores and sells propane in wholesale markets.

In 2016, the company gathered and processed 6.5 trillion Btdu of natural gas and about 393,000 barrels per day of NGLs.