USA TODAY | Top 20 onshore US oil and gas spills since 2010 USA TODAY The spill of an estimated 210,000 gallons of crude oil in South Dakota on Thursday from TransCanada's Keystone Pipeline is one of the 20 largest onshore oil or petroleum product spills since 2010. Here are the top 20 spills during that period as ... Keystone pipeline spills 5000 barrels of oil in US Energy Recap: Keystone Pipeline In The News After Oil Leak TransCanada Shuts Down Part of Keystone Pipeline After 210000-Gallon South Dakota Oil Spill |