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TransCanada's application.
TransCanada applies for permission for the Keystone XL Pipeline in the US. -
Opposition.
Without any concrete response from the United States government, TransCanada visits various landowners of the pipeline route. The first opposition was in Nebraska, to which the corporation responded with eminent domain of the land used by them. -
First approval.
The National Energy Board of Canada approves the project with 22 conditions. -
US Opposition.
Scientists, legislators, and EPA experts oppose to the Keystone XL Pipeline. -
Period: to
North Dakota spills.
Several pumping stations of the Keystone Pipeline in North Dakota spilled about 400 barrels of "dirty" oil more than 10 times in less than a year. -
Rerouting.
The US government announces that the pipeline has to be rerouted and TransCanada agrees. -
Rejection.
US President Barack Obama rejects the Keystone XL Pipeline, though states that the corporation can send another application. -
New route.
TransCanada applies for permission with the new route. -
Opposers vs. Supporters.
Opposers demand Nebraska's government after they approve the pipeline. -
Disagreement between the US government.
The US Senate approves the extension of the Keystone Pipeline and Obama rejects it once again. -
Pending approval.
President Donald Trump is elected and shortly after decides that the US government will reconsider the extension of the pipeline, although he also mentions he intends to renegotiate.