Wyoming company accused of concealing problems with a broken pipeline after a crude spill

Broken pipeline left MT town with tainted drinking water

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U.S. prosecutors suspect a Wyoming company of potentially concealing problems with a pipeline that broke in 2015 and spilled more than 50,000 gallons of crude into Montana’s Yellowstone River, fouling a small city’s drinking water supply, court filings show.

The government is suing Bridger Pipeline for violations of environmental laws in the 2015 spill, which came after the line buried beneath the Yellowstone became exposed and broke when ice scoured the river bottom near Glendive, Montana.

The accident came a few years after an Exxon-Mobil pipeline spilled into the river near Billings, The spills helped put a national focus on the nation's aging pipeline network, which has continued to suffer high profile accidents including recent spills in Louisiana and California.

A survey of Bridger's pipeline on the company's behalf in 2011 included a note that the pipe was buried only 1.5 feet beneath the ever-shifting river bottom. That would have put it at heightened risk of breaking.

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But after the spill, prosecutors alleged, company representatives referenced a second survey when they told federal regulators that the pipeline had been buried at least 7.9 feet (2.4 meters), giving it "adequate cover" to protect against spills.

Federal prosecutors are suing pipeline operator Bridger Pipeline for violations of pollution laws following spills in Montana and North Dakota. 

Federal prosecutors are suing pipeline operator Bridger Pipeline for violations of pollution laws following spills in Montana and North Dakota.  (AP Photo/Matthew Brown, File)

"This raises questions – which Bridger has yet to answer – about whether Bridger concealed material facts about the condition of the crossing before the Yellowstone spill," assistant U.S. Attorney Mark Elmer wrote in court documents.

Attorneys for Bridger rejected the allegations about conflicting surveys as "conspiracy theories."

Pipeline company spokesperson Bill Salvin said the government misunderstood the surveys.

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"There was adequate depth of cover across the entire crossing," Salvin said. "We think the government is trying to find something that’s just not there."

Federal prosecutors are pursuing a separate case against a sister company, Belle Fourche Pipeline, over a 2016 spill in North Dakota that released more than 600,000 gallons of crude and contaminated the Little Missouri River and a tributary.

Both pipeline business are part of Casper, Wyoming-based True Companies, which operates 1,800 miles of line in Montana, North Dakota and Wyoming.

Prosecutors allege the spills violated the Clean Water Act and are subject to penalties of up to $6.6 million in the Montana case and up to $89.5 million in the North Dakota case.

Salvin declined to comment on the North Dakota case. Thursday is the deadline for the company to respond to the government’s allegations, under an order from U.S. Magistrate Judge Clare R. Hochhalter.

The legal challenges over the spills come as Bridger seeks to build a new pipeline from western North Dakota to southeastern Montana. North Dakota Public Service Commission approved part of the line last month.

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Bridger last year reached a $2 million settlement with the federal government and Montana over damages from the Yellowstone River spill. The company was previously fined $1 million in the case by the Montana Department of Environmental Quality.