TransCanada received permission from federal regulators to re-start the Keystone Pipeline a week after a 16,800-gallon spill in South Dakota. The pipeline started back up on Sunday morning at a reduced operating pressure.
The incident has given ammunition to a group appealing the decision by the South Dakota Public Utility Commission (PUC) to re-certify TransCanada’s permit to build the Keystone XL Pipeline, despite President Obama’s denial of a permit needed to cross international borders.
The PUC reasoned that the next president could decide to issue the permit — a reminder that TransCanada has not given up on building the northern route of the Keystone XL. However, this most recent spill renews questions about the company’s ability to build safe pipelines.
When Evan Vokes, a former TransCanada materials engineer-turned-whistleblower, heard about a small spill along the Keystone Pipeline, he guessed that the leak would be found at a transition weld near where the pipeline crossed under a road. Transition welds connect thinner-walled pipe to thicker-walled pipe.
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