Wednesday night’s Keystone Pipeline crude oil spill in north-central Kansas’ Washington County is likely the pipeline’s largest spill to date. At an estimated 14,000 barrels, it is larger than all the pipeline’s previous spills combined, according to a report on the pipeline’s previous spills from the Government Accountability Office (GAO). The pipeline became operational in 2010. Since then, it has experienced 23 spills— ten of which have occurred in Kansas or Missouri. “This is very serious,” said Zack Pistora, a Kansas lobbyist for the Sierra Club, one of the nation’s largest environmental organizations. The spilled amount is equivalent to around 558,000 gallons— enough to fill around 43 ½ standard swimming pools. Crews continue to work on cleanup at the Mill Creek spill site northeast of the small city of Washington, Kansas, located around three hours’ drive northwest of Kansas City. TC Energy, the Canadian company which operates the pipeline, is now calling the spill the Mil...