A Minnesota crude oil pipeline with an elevated risk of rupturing finally may get replaced — much to the relief of state officials who for years have warned about its threat to people and the environment.
Enbridge Energy announced this week that it would spend $2.6 billion to replace the U.S. portion of the line by 2017. The 1968-era pipeline carries oil from Canada through northern Minnesota to Superior, Wis.
After a 2002 rupture in Cohasset, Minn., federal investigators concluded that improper shipping of the original pipe left tiny cracks that can turn into big ones. To reduce risk, the pipeline known as "Line 3" operates at roughly half its maximum capacity.
"We are welcoming the retirement," said Steve Lee, manager of emergency response for the state Pollution Control Agency, which once warned of potentially "frightening" consequences if the line failed near places like the Mississippi River.
Two environmental groups have immediately taken stands against the replacement project. MN350, a climate advocacy group, and the Sierra Club said they will fight the Line 3 project because it would shift to carrying the same Canadian tar sands oil as the controversial Keystone XL pipeline proposed through western states.
"We see the line as another tar sands line," said Tom McSteen, lead convener for MN350, which is loosely affiliated with the activists that have held anti-Keystone protests at the White House. "We are really opposing the extraction of tar sands oil whether shipped by pipeline or oil train."
Both groups also oppose the expansion of Enbridge's Alberta Clipper pipeline which carries crude oil through Minnesota from Edmonton along the same corridor as Line 3.
In announcing the Line 3 replacement, Calgary-based Enbridge said it had become expensive to maintain, and that a new line could safely operate at 760,000 barrels per day. The existing line was designed for that capacity, but operates at roughly 400,000 barrels per day. It now carries light crude, but the new line would be dedicated to heavy crude to meet shipper demand from the oil sands region of northern Alberta, said Lorraine Little, an Enbridge spokeswoman.