The Enbridge Line 4 pipeline, a 796,000 barrels per day pipeline from Alberta to Superior, Wisconsin, has spilled 1,350 barrels of oil at a pumping station in Regina.
Council of Canadians Regina chapter activist Jim Elliott says, "It only took 2 minutes and 26 seconds to spill 1,350 barrels of oil in the latest spill in Regina."
Enbridge's Line 1 to 4 pipelines converge at Lake Superior and from there join with Line 5 which goes around the northern shore of Lake Michigan (and under the Straits of Mackinac) and Line 6 which goes around the southern shore of the lake.
It is not clear at this point how long Line 4 will be shut down because of the leak which is now under investigation. Enbridge said in June that it was building a connection between Line 4 and Line 67 so that barrels could be diverted to Line 67 during a prolonged disruption. Line 67 also runs from Alberta to Wisconsin.