Addtional links for those who may want more sources…
http://www.cnn.com/2016/09/09/us/dakota-access-pipeline/
http://theantimedia.org/justice-department-dakota-access-pipeline/
http://www.nytimes.com/2016/09/10/us/judge-approves-construction-of-oil-pipeline-in-north-dakota.html?_r=0 (Link name is misleading, though the initial judge involved did okay the pipeline, the Justice Department shot them down.)