FIRST AIRED: November 27, 2017

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00:00:00
>> The keystone pipeline which runs from Canada down to the US Gulf Coast, leaked substantially more oil, and more often than indicated in spill risk assessments TransCanada provided to regulators. That's according to documents reviewed by Reuters, which showed that TransCanada, which owns the pipeline, estimated the chance of a spill of more than 50 barrels to be "not more than more than once every 7 to 11 years over the entire length of the pipeline in the United States.
00:00:30
For South Dakota alone, where the pipeline has leaked twice, the estimate was for a spill no more than once every 41 years. But the pipeline has already been operating for about seven years, and already has had three major spills in the U.S, including a 5,000 barrel spill earlier this month in rural South Dakota.
00:00:50
TransCanada is seeking to expand the pipeline with its proposed Keystone Excel project. It already has President Trump's approval.>> Keystone Pipeline.