The prospective route for the Keystone pipeline, which would connect Canadian tar sands fields to the Gulf coast, runs through the 922,759-acre (1,442 sq mi) Rosebud Sioux reservation in south-central South Dakota.
….. the creation of the pipeline would violate the 1868 Treaty of Fort Laramie, an agreement between the Sioux and the US government allocating parts of the Dakota territory to the Sioux. He also said he has not been consulted by the US government or TransCanada, the Canadian company behind the 1,700-mile pipeline.
http://www.theguardian.com/environment/2014/nov/17/sioux-tribe-keystone-xl-pipeline-south-dakota-act-of-war
….. the creation of the pipeline would violate the 1868 Treaty of Fort Laramie, an agreement between the Sioux and the US government allocating parts of the Dakota territory to the Sioux. He also said he has not been consulted by the US government or TransCanada, the Canadian company behind the 1,700-mile pipeline.
http://www.theguardian.com/environment/2014/nov/17/sioux-tribe-keystone-xl-pipeline-south-dakota-act-of-war