Dakota Access, a project of Energy Transfer Partners and other companies, would supplant 740 railcars of oil a day. In early 2016, the $3.8 billion pipeline was moving ahead, with almost every mile of the 1,172 miles completed. It had gone through its environmental reviews and had received the approval of the U.S. Army Corps of Engineers, which is required by law to sign off on parts of pipelines that cross or go below rivers and waterways. The company had also consulted with about fifty Indian tribes and made 140 revisions in the route as a result.
