"TransCanada's proposed Keystone XL Pipeline would transport oil sands crude from Canada and shale oil produced in North Dakota and Montana to a market hub in Nebraska for further delivery to Gulf Coast refineries. The pipeline would consist of 875 miles of 36-inch pipe with the capacity to transport 830,000 barrels per day. Because it would cross the Canadian-U.S. border, Keystone XL requires a Presidential Permit from the State Department predicated on the department's determination that the project would serve the national interest. That determination considers environmental impacts, evaluated and documented in an environmental impact statement (EIS) pursuant to the National Environmental Policy Act (NEPA). TransCanada originally applied for a Presidential Permit for the Keystone XL Pipeline in 2008. An issue that arose during the permit review was environmental impacts in the Sand Hills region of Nebraska. This concern led the Nebraska legislature to enact new state pipeline siting requirements that would alter the pipeline route. The Presidential Permit was subsequently denied by the State Department. In May 2012, TransCanada reapplied for a Presidential Permit with a modified route through Nebraska. The new permit application initiated a new NEPA process."
CRS Report for Congress, R43787