Keystone pipeline leak in South Dakota likely caused by 2008 damage: report | Globalnews.ca
Pipeline Expert: Government Underestimated Risk of an Oil Spill from Dakota Access Pipeline | Earthjustice
Massive 2013 oil spill in North Dakota still not cleaned up | AP News
Pipeline Spill Adds To Concerns About Dakota Access Pipeline : NPR
Tesoro's North Dakota oil pipeline cleanup (PHOTOS)
Land affected by Keystone pipeline leak bigger than thought
2013 North Dakota oil spill cleanup ongoing; work to be done by 2017 : The American Energy News
KXL oil spill in North Dakota
Cleanup Ongoing after North Dakota Pipeline Oil Spill
North Dakota: The Oil Spill State | Earth Focus | News & Community | KCET
North Dakota Pipeline Oil Spill | Preserve the Beartooth Front
Keystone Pipeline Spill Affecting Gas Prices Over Thanksgiving Holiday - KVRR Local News
Oil spill from Keystone Pipeline in South Dakota twice as big as first thought | Globalnews.ca
North Dakota farmer makes crude discovery: largest oil spill on US soil | Fox News
Keystone South Dakota Oil Spill | Workers clean up an oil sp… | Flickr
December Crude Spill In North Dakota Thrice As Big As Originally Estimated | OilPrice.com
In Wake of North Dakota Spill, Congress Wants Review of Keystone Pipeline
In North Dakota, Oilfield Spill Problems Worsen | Inside Energy
Keystone pipeline reopens after 1.4 million-litre spill in North Dakota | CBC News
TransCanada Fails the Safety Test Again: A Timeline of the South Dakota Keystone I Pipeline Spill | Bold Nebraska
With Big Spill to Clean, Pipeline Owner Seeks Keystone XL Approval - The New York Times
Keystone Pipeline spill in South Dakota twice as big as first thought
Keystone Pipeline Spill History | Bold Nebraska
Democrats call for review of Keystone pipeline following spill | CBC News
Opposition to Keystone 1 Pipeline in South Dakota and huge oil leak, USA | EJAtlas
