On January 20, 2021, President Joe Biden signed an executive order to revoke the permit that was granted to TC Energy Corporation for the Keystone XL Pipeline (Phase 4). On January 24, 2017, President Donald Trump took action intended to permit the pipeline's completion. In 2015 KXL was temporarily delayed by President Barack Obama. The pipeline became well known when Phase IV KXL attracted opposition from environmentalists, becoming a symbol of the battle over climate change and fossil fuels. It would have run through Baker, Montana, where American-produced light crude oil from the Williston Basin ( Bakken formation) of Montana and North Dakota would have been added to the Keystone's throughput of synthetic crude oil (syncrude) and diluted bitumen ( dilbit) from the oil sands of Canada. The proposed Phase IV, Keystone XL (sometimes abbreviated KXL, with XL standing for "export limited" ) Pipeline, would have connected the Phase I-pipeline terminals in Hardisty, Alberta, and Steele City, Nebraska, by a shorter route and a larger-diameter pipe. By comparison, production of petroleum in the United States averaged 9.4 million barrels (1.5 million cubic meters) per day in first-half 2015, with gross exports of 500,000 barrels (79,000 m 3) per day through July 2015. Phase III has capacity to deliver up to 700,000 barrels (110,000 m 3) per day to the Texas refineries. In 2013, the first two phases had the capacity to deliver up to 590,000 barrels (94,000 m 3) per day of oil into the Midwest refineries.
TransCanada Keystone Pipeline GP Ltd, abbreviated here as Keystone, operates four phases of the project. It runs from the Western Canadian Sedimentary Basin in Alberta to refineries in Illinois and Texas, and also to oil tank farms and an oil pipeline distribution center in Cushing, Oklahoma. The Keystone Pipeline System is an oil pipeline system in Canada and the United States, commissioned in 2010 and owned by TC Energy and as of 31 March 2020 the Government of Alberta.