TransCanada could lose Keystone permit over oil spill, South Dakota regulator says - MarketWatch
Video Keystone pipeline spills over 380,000 gallons in North Dakota - ABC News
Tesoro's North Dakota oil pipeline cleanup (PHOTOS)
Opposition to Keystone 1 Pipeline in South Dakota and huge oil leak, USA | EJAtlas
S. Dakota Keystone pipeline shut down after oil spill
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Keystone Pipeline Leaks 14,000 Barrels of Oil in Kansas | Smart News| Smithsonian Magazine
North Dakota oil spill raises questions about safety | MPR News
Keystone pipeline reopens after 1.4 million-litre spill in North Dakota | CBC News
Massive 2013 oil spill in North Dakota still not cleaned up | whas11.com
HazardEx - US Keystone pipeline leaks for second time in two years
Documents Raise Important Questions About Tesoro's Pipeline Spill in North Dakota - DeSmog
South Dakota Oil Spill Reveals Major Pipeline Problems | Time
December Crude Spill In North Dakota Thrice As Big As Originally Estimated | OilPrice.com
Cause of Keystone Pipeline Spill Worries South Dakota Officials as Oil Flow Restarts - Inside Climate News
Oil Spill in North Dakota Raises Detection Concerns - The New York Times
In North Dakota, Oilfield Spill Problems Worsen | Inside Energy
In North Dakota, Oilfield Spill Problems Worsen | Inside Energy
The Keystone Pipeline oil leak is almost 10 times worse than initially thought | CNN
Keystone Pipeline Spill History | Bold Nebraska
Salting the earth: North Dakota farmers struggle with a toxic byproduct of the oil boom
How long did the North Dakota oil spill remain undetected? - Greenpeace USA
Oil spill from Keystone Pipeline in South Dakota twice as big as first thought | Globalnews.ca
Why Electric Cars are Better: Massive Keystone Pipeline Oil Leak Twice as bad as Thought
