This environmental impact statement (EIS) analyzes the environmental impacts of the TransCanada Keystone Oil Pipeline Project. The U.S. Department of State (DOS) was the lead agency. The U.S. Department of Energy's (DOE's) Western Power Administration (Western) participated as a cooperating agency in the preparation of this EIS in order to address Western's proposed response to interconnection requests from Minnkota Power Cooperative, Central Power Electric Cooperative, and East River Electric Power Cooperative requiring modification of three existing Western substation facilities and construction of one new tap facility. DOE adopted the DOS Final EIS as DOE/EIS-0410 on January 21, 2009.