Portland-Montreal Pipe Line

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

Portland-Montreal Pipe Line is an oil pipeline in Canada and the United States.[1][2]


The pipeline runs from South Portland, Maine, to Montreal, Quebec.

Loading map...

Project Details

  • Operator:
  • Owner: Portland Pipe Line Corporation, Montreal Pipe Line Limited[1][2]
  • Parent company:
  • Capacity: 600,000 barrels per day
  • Length: 236 mi (380 km)[2]
  • Diameter:
  • Status: Operating[2]
  • Start year: 1941[2]
  • Cost:
  • Financing:
  • Associated infrastructure:


The Portland Montreal Pipe Line is a series of underground crude oil pipelines connecting South Portland, Maine, in the United States with Montreal, Quebec, in Canada.[3]

The facility includes 23 oil tanks and a capacity of 3.5 million barrels (560,000 m3) of crude oil. The oil was then pumped through two separate pipelines, one of which is 18 inches (460 mm) in diameter and the other of which is 24 inches (610 mm) in diameter.[4] The pipeline extends 236 miles (380 km), 3 feet (0.91 m) beneath the surface, and has several pump stations distributed throughout the line. The pipeline crosses into the mountains of New Hampshire and Vermont, eventually passing under the St. Lawrence River, extending into Montreal. From South Portland to Montreal, it took between 36–43 hours for the oil to reach its destination for refining.[5] There is a third decommissioned line, 12 inches (300 mm) in diameter. Lines not being used are filled with nitrogen, an inert gas.[6]

From 2005 to 2015, use of the Portland-Montreal Pipe Line fell from a flow of roughly 150 million barrels annually to 22 million in 2015, as some Montreal refineries had closed and others have increasingly fed by crude extracted from the oil sands in western Canada.[7]

In January 2016, the pipeline flow was essentially stopped. Its volume had been decreasing for several years. The completion of a major pipeline project connecting the Montreal refineries to Alberta tar sands and Bakken Formation light sweet crude sources and the closure of the Shell Montreal-Est refinery made oil transportation from Maine unnecessary. According to consulting firm Turner, Mason & Co., "there is no need to move crude oil from Portland to Montreal. That is a permanent change." Any future use of the pipeline would be in the other direction.[8]


The pipeline traces its history to the early years of World War II when oil shipments to Canada were severely disrupted by the Kriegsmarine during the Battle of the St. Lawrence and the larger Battle of the Atlantic. In order to safely transport oil to central Canada, a pipeline was proposed to connect the Port of Portland in Maine with refineries in Montreal.[3]

The marine terminal was built on the south side of the Fore River in the city of South Portland immediately downstream of the Portland Terminal Company's railroad bridge over the river. The pipeline route from Portland to Montreal was mostly built alongside the existing right of way for the Portland - Montreal rail line which was owned at that time by the Canadian National Railways (CNR) and called the CNR's Berlin Subdivision. This rail line was built in the 1850s by the Atlantic & St. Lawrence Railroad which was purchased by the Grand Trunk Railway shortly after completion. The Grand Trunk Railway encountered financial difficulties after World War I, and the company was nationalized by the Government of Canada in 1923 with its properties merged into the CNR.[3]

Construction of the original pipeline was finished in 1941, and the transportation of oil to Montreal began. The pipeline originally consisted of three separate pipes, which crossed through the same common right-of-way. The third and smallest pipe was decommissioned in 1982. Up until 2016, two pipes operated after they underwent renovation. Since it has been in service, the pipeline has pumped over 5 billion barrels (790,000,000 m3) of oil to Montreal refineries.[9] The pipeline was the primary reason that the Port of Portland had the largest volume oil port on the Eastern Seaboard, as more than 200 tankers delivered oil to the pipeline marine terminal annually.[10]

In the summer of 2016 the pipeline broke a five-month dry spell, carrying nearly 3 million barrels of crude oil from storage tanks in South Portland to refineries in Montreal. However, the use of the pipeline was due to supply interruptions during the 2016 Fort McMurray wildfires in Alberta, Canada, and is expected to be temporary.[7]

South Portland Clear Skies Ordinance

A citizen-led initiative in August 2013 submitted a proposed city ordinance to the South Portland city council, via a petition. The "Waterfront Protection Ordinance" aimed to ban future Canadian tar sands oil from a reversed pipeline from being exported through the city's port. The city council voted against enacting the ordinance, which forced it to a public referendum that November.[11] Five of the seven councilors sided with oil and gas industry interests in opposing the ordinance as being too broad.[12][13] Despite the support of South Portland mayor Tom Blake, the measure was narrowly defeated in the ballot.[14]

A revised version known as the "Clear Skies Ordinance" was created by a Draft Ordinance Committee, supported by citizen group Protect South Portland. It was passed by city council in July 2014. The ordinance prohibits the bulk loading of crude oil onto tankers in South Portland, where the pipeline terminates. Tom Hardison, vice-president of the Portland Pipe Line Corp., characterized it as a "biased process" and a "vote against jobs, energy and the waterfront".[15]

The Bangor Daily News had reported that "while several cities and towns along the pipeline have adopted nonbinding resolutions protesting the movement of the bituminous oil through their communities, the South Portland ordinance is viewed as the only measure that could actually prevent it."[11]

Danielle Droitsch, of the Natural Resources Defense Council, said the Clear Skies Ordinance would be "very significant" in the fight against tar sands oil. The city received a letter from the American Petroleum Institute, a major lobby group, indicating that vigorous legal challenges would be made to overturn it. The oil industry had spent approximately $650,000 USD in the fight to defeat the original ordinance.[16]

In February 2015, Portland Pipe Line filed a lawsuit in U.S. District Court to overturn the ordinance as being unconstitutional, and interfering with interstate and international trade.[17] As of March 2016, the lawsuit is still pending. Since the transport of oil from Maine to Quebec has been stopped, the pipeline is likely to remain inoperational unless the ordinance is overturned.[8]

In August 2018, a federal judge ruled that South Portland's anti-pipeline ordinance was constitutional.[18]

Articles and resources


  1. 1.0 1.1 Portland-Montreal Pipe Line, Wikipedia, accessed September 2017
  2. 2.0 2.1 2.2 2.3 2.4 "About Us - Portland Montreal Pipe Line". Portland Montreal Pipe Line. Retrieved 2023-03-02.
  3. 3.0 3.1 3.2 "Portland-Montreal Pipe Line Honored for Maritime Protection", Association of Oil Pipe Lines/American Petroleum Institute, Dec. 2004
  4. "Neighbor's Guide". Portland Pipe Line Corporation / Montreal Pipe Line Limited. Retrieved May 20, 2016.
  5. Holmquist, Wayne R. "The Portland Pipeline". Raymond-Casco Historical Society. Retrieved May 20, 2016.
  6. Braithwaite, Chris (September 28, 2011). "Exposed pipeline is safe, company says". The Chronicle. Barton, Vermont. p. 3.
  7. 7.0 7.1 "Oil flowed from South Portland again this summer. But it probably won’t last," BDN Portland, August 25, 2016
  8. 8.0 8.1 Tom Bell (March 8, 2016). "South Portland-to-Montreal crude oil pipeline shut down". The Portland Press Herald. Associated Press. Retrieved May 20, 2016.
  9. "About Us". Portland Pipe Line Corporation / Montreal Pipe Line Limited. Retrieved May 20, 2016.
  10. "Pipeline pondering flow change". Portland Press Herald.
  11. 11.0 11.1 Seth Koenig (August 19, 2013). "South Portland becomes ground zero for Maine tar sands debate; new rules headed for vote". Bangor Daily News. Retrieved May 19, 2016.
  12. David Harry (August 20, 2013). "Tar sands ban goes to November ballot in South Portland". The Forecaster. Retrieved May 20, 2016.
  13. Harry, David (October 24, 2013). "South Portland waterfront ordinance: Tar sands shield, or oil industry silver bullet?". The Forecaster. Retrieved 10 April 2016.
  14. Whit Richardson (November 5, 2013). "South Portland narrowly rejects attempt to ban 'tar sands oil' from waterfront". Bangor Daily News. Retrieved May 18, 2016.
  15. Bouchard, Kelley (July 22, 2014). "South Portland approves law barring tar sands oil". Portland Press Herald. Retrieved 10 April 2016.
  16. Neela Banerjee (July 21, 2014). "Maine town fights plan to use pipeline to export oil sands crude". LA Times. Retrieved May 19, 2016.
  17. Duke Harrington (February 13, 2015). "South Portland sued over tar sands ban". South Portland Sentry. Retrieved May 20, 2016.
  18. South Portland’s Tar Sands Ban Upheld in a ‘David vs. Goliath’ Pipeline Battle, Inside Climate News, Aug. 28, 2018

Related GEM.wiki articles

External resources

External articles