Keystone Pipeline Shut Down After Leaking 383,000 Gallons of Crude Oil Into US CC BY 2.0 / shannonpatrick17 / Trans Canada Keystone Oil Pipeline Environment 00:06 01.11.2019(updated 00:07 01.11.2019) Get short URL 4102 TC Energy, formerly known as TransCanada, is searching for answers and has been faced with extensive cleanup efforts after the Keystone pipeline system “released” 400,000 gallons of crude oil into North Dakota wetlands Tuesday night. An emergency response crew was dispatched by TC Energy on October 29 after the Canada-based energy company detected a drop in pipeline pressure around 9:20 p.m. local time and shut down its...