It has been a year since the Keystone pipeline leaked about 407,000 gallons of oil in northeastern South Dakota, and although the resulting damage has been mitigated, a final federal investigation report has yet to be released.

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A federal judge heard conflicting arguments Thursday on whether he should block a capacity expansion on the Alberta Clipper oil pipeline or allow a temporary workaround that lets Enbridge Energy move hundreds of thousands of barrels per day of Canadian tar sands crude across the border without triggering the kind of environmental review that has held up the proposed Keystone XL pipeline.

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Oklahoma oil producers said the planned opening next month of the southern leg of the Keystone XL pipeline will remove a glut of crude oil at a storage hub in Cushing and help them get a price that better competes with what producers along the Gulf Coast receive.

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The chief executive of TransCanada Corp. said Friday the long-delayed Keystone XL pipeline will be in service months later than expected and cost more as it continues to await U.S. government approval.

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Prominent environmental leaders, including the head of the Sierra Club, were arrested Wednesday after tying themselves to the White House gate to protest the Keystone XL oil pipeline.

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A two-year federal transportation bill passed by Congress on Friday spares Wisconsin both a feared $60 million cut and the uncertainty of another short-term extension.

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The House has passed legislation aimed at keeping alive prospects for a long-term transportation plan that would provide highway and transit aid to states this year.

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