Mackenzie Valley Pipeline cancellation (2011)
A proposed 1,200-kilometre natural gas pipeline from the Arctic to Alberta spent more than a decade in regulatory review, with environmental and Indigenous opposition mounting and costs climbing.
The consortium pulled the project in December 2011, citing rising costs and policy uncertainty.
It became the standard cautionary tale for Canadian energy mega-projects stalled by permitting delays.
On the same Western Canadian gas resource, LNG Canada reached FID in a year under the Major Projects Office, a direct contrast with Mackenzie's fate.
