Nebraska’s approval of an alternative route could throw more uncertainty into the  mix for the long-delayed Keystone XL oil pipeline.

The Public Service Commission approved  TransCanada Corp.’s project on a three-to-two vote, removing one of the last hurdles to the Calgary-based company’s construction of the $8 billion, 1,179-mile (1,897-kilometer) conduit, which has been on its drawing boards since 2008. The decision, though, wasn’t wrinkle-free: The commission approved an alternative route that was immediately targeted by foes as lacking adequate vetting.

Jane Kleeb, president of the environmental advocacy group Bold Alliance, said green-lighting the alternative may have helped the commission reach a "middle ground solution.” But it opens new questions that she said her group would explore in federal court.

That view mirrored a dissenting opinion from Commissioner Crystal Rhoades, who spoke before the final vote. TransCanada didn’t meet "the burden of proof” in determining that the pipeline is in the state’s public interest, Rhoades said. The alternative route, she said, needed more study on both the state and federal level, and it failed to give landowners along that different path the ability to address the commission.

For example, she said Nebraska’s Department of Environmental Quality didn’t analyze the alternative route at all in its 2013 report. "It is clear” TransCanada “never intended it to be considered," Rhoades said.

‘Years of Study’

In its post-hearing brief, TransCanada told the panel its "preferred route was the product of literally years of study, analysis and refinement by Keystone, federal agencies and Nebraska agencies," and that no alternate route, even one paralleling the Keystone mainline as the approved path does, was truly comparable.

TransCanada didn’t immediately respond to emails and telephone calls seeking comment. Following the vote, the company’s shares rose 2.3 percent in New York trading.

The panel’s decision overrode the objections of environmental conservationists, Native American tribes and landowners along the pipeline’s prospective route. The project had the support of the state’s governor, Republican Pete Ricketts, its chamber of commerce, trade unions and the petroleum industry.

With Nebraska’s go-ahead in hand, TransCanada still must formally decide whether to proceed with construction on the line, which would send crude from Hardisty, Alberta, through Montana and South Dakota to Nebraska, where it will connect to pipelines leading to U.S. Gulf Coast refineries. The XL pipeline would add the ability to move 830,000 barrels a day, more than doubling the existing line’s capacity.

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