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January 4, 2013

Floods blamed for 16 spills

BILLINGS, Mont. — Pipeline spills caused by flooding and riverbed erosion dumped 2.4 million gallons of crude oil and other hazardous liquids into U.S. waterways over the past two decades, according to a new report from federal regulators.

The Department of Transportation report to Congress was crafted in response to a 2011 spill into Montana’s Yellowstone River. The spill highlighted concerns about federal pipeline rules that require lines to be buried just 4 feet below riverbeds — scant cover that can quickly be scoured away by floodwaters.

The Associated Press obtained the report this week before its public release.

Regulators found flood-related pipeline spills since 1993 in California, Texas, Iowa, Louisiana, Montana, Nebraska, South Dakota and Kentucky. Of the 2.4 million gallons of oil, gasoline, propane and other hazardous liquids released, less than 300,000 gallons was recovered.

Although those accidents account for less than 1 percent of the total number of pipeline accidents, the consequences of a release in water can be much more severe because of the threats to drinking water supplies and the heightened potential for environmental damage.

The 16 spills cost companies almost $200 million combined in property damages, lost product, cleanup work and other expenses, according to an AP review of accident records.

The most recent accidents came during flooding in 2011 throughout the Missouri River Basin.

Those include the Yellowstone River spill that saw a severed Exxon Mobil Corp. pipeline release 63,000 gallons. A NuStar Energy LP pipeline also spilled 4,200 gallons of anhydrous ammonia into the Missouri River in Nebraska, and an Enterprise Products Partners LP pipeline released 28,350 gallons of gasoline into the Missouri River in Iowa.

U.S. Sen. Max Baucus, who requested the report with fellow Montana Democratic Sen. Jon Tester, said the results reveal “some pretty clear holes in pipeline oversight when it comes to flooding.”

But Baucus said the report leaves unanswered basic questions about what steps can be taken to prevent future accidents.

Transportation Department officials will next evaluate whether pipeline crossing rules such as the 4-foot depth requirement are sufficient, said Jeannie Layson, communications director for the agency’s Pipeline and Hazardous Materials Safety Administration.

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