Canada's government says it will buy controversial Trans Mountain pipeline to ensure it gets built. : Canada's federal government said Tuesday it is buying a controversial pipeline from the Alberta oil sands to the Pacific Coast to ensure it gets built. Prime Minister Justin Trudeau's government plans to spend $4.5 billion Canadian (US$3.4 billion) to purchase Kinder Morgan's Trans Mountain pipeline. The pipeline expansion would triple the capacity of an existing line to ship oil extracted from the oil sands in Alberta across the snow-capped peaks of the Canadian Rockies.