The Keystone XL Pipeline (the proposed Project) is a proposed 875-mile pipeline project that would allow delivery of up to 830,000 barrels per day (bpd) of crude oil from the Western Canadian Sedimentary Basin (WCSB) in Canada and the Bakken Shale Formation in the U.S. to Steele City, Nebraska, for onward delivery to refineries in the Gulf Coast area. TransCanada Keystone Pipeline, LP has applied for a Presidential Permit that, if granted, would authorize the proposed pipeline to cross the U.S.-Canadian border at Morgan, Montana. The U.S. Dept. of State prepared this Final Supplemental Environmental Impact Statement to assess the potential impacts associated with the proposed Project and its alternatives. This Statement makes few changes to the conclusion reached in a previously issued report, that rejecting the Keystone XL pipeline would not hinder development of oil sands in Canada (which are emissions-intensive). However, it makes no statement about the impact of greenhouse gas emissions from the proposed Project. Tables and figures. This is a print on demand report.