Mackenzie Valley Pipeline Inquiry

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The Mackenzie Valley Pipeline Inquiry, also known as the Berger Inquiry after its head Justice Thomas Berger, was commissioned by the Government of Canada on March 21, 1974, to investigate the social, environmental, and economic impact of a proposed gas pipeline that would run through the Yukon and the Mackenzie River Valley of the Northwest Territories. This proposed pipeline became known as the Mackenzie Valley Pipeline.

The inquiry cost C$5.3 million, and produced over 40,000 pages of text and evidence, comprising 283 volumes. The commission recommended that no pipeline be built through the northern Yukon and that a pipeline through the Mackenzie Valley should be delayed for 10 years.