Massive 2013 oil spill in North Dakota still not cleaned up | whas11.com
Massive 2013 Oil Spill in North Dakota Still Not Cleaned Up
HazardEx - US Keystone pipeline leaks for second time in two years
TransCanada could lose Keystone permit over oil spill, South Dakota regulator says - MarketWatch
Opposition to Keystone 1 Pipeline in South Dakota and huge oil leak, USA | EJAtlas
December Crude Spill In North Dakota Thrice As Big As Originally Estimated | OilPrice.com
Over 380,000 gallons of oil spill from Keystone pipeline in North Dakota - ABC News
South Dakota Oil Spill Reveals Major Pipeline Problems | Time
In North Dakota, Oilfield Spill Problems Worsen | Inside Energy
Documents Raise Important Questions About Tesoro's Pipeline Spill in North Dakota - DeSmog
With Big Spill to Clean, Pipeline Owner Seeks Keystone XL Approval - The New York Times
Tesoro's North Dakota oil pipeline cleanup (PHOTOS)
Keystone Pipeline Oil Spill Reported In South Dakota : The Two-Way : NPR
North Dakota: The Oil Spill State | Earth Focus | News & Community | KCET
Pipeline Spill Adds To Concerns About Dakota Access Pipeline : NPR
Farmers Fight a New Kind of Pipeline Spill--Salty Wastewater - WSJ
North Dakota oil spill raises questions about safety | MPR News
Keystone Pipeline spill in South Dakota twice as big as first thought
How long did the North Dakota oil spill remain undetected? - Greenpeace USA
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Keystone Pipeline Leaks 14,000 Barrels of Oil in Kansas | Smart News| Smithsonian Magazine
S. Dakota Keystone pipeline shut down after oil spill
