Keystone Pipeline spill in South Dakota twice as big as first thought
With Big Spill to Clean, Pipeline Owner Seeks Keystone XL Approval - The New York Times
Tesoro's North Dakota oil pipeline cleanup (PHOTOS)
Pipeline Spill Adds To Concerns About Dakota Access Pipeline : NPR
South Dakota Oil Spill Reveals Major Pipeline Problems | Time
North Dakota oil spill raises questions about safety
North Dakota: The Oil Spill State | Earth Focus | News & Community | KCET
Democrats call for review of Keystone pipeline following spill | CBC News
TransCanada could lose Keystone permit over oil spill, South Dakota regulator says - MarketWatch
December Crude Spill In North Dakota Thrice As Big As Originally Estimated | OilPrice.com
In North Dakota, Oilfield Spill Problems Worsen | Inside Energy
Land affected by Keystone pipeline leak bigger than thought
Opposition to Keystone 1 Pipeline in South Dakota and huge oil leak, USA | EJAtlas
North Dakota farmer makes crude discovery: largest oil spill on US soil | Fox News
Keystone Pipeline Oil Spill Reported In South Dakota : The Two-Way : NPR
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 | AP News
KXL oil spill in North Dakota
2013 North Dakota oil spill cleanup ongoing; work to be done by 2017 : The American Energy News
TransCanada Fails the Safety Test Again: A Timeline of the South Dakota Keystone I Pipeline Spill | Bold Nebraska
How Much Oil Has Spilled From US Pipelines Since 2010
