Cold temperatures contributed to three brine spills at oil and gas wells in northwest North Dakota, according to statements released by the Oil and Gas Division on Monday.

Marathon Oil Co. reported Friday that 440 barrels, or 18,480 gallons, of brine spilled at well about 10 miles southwest of New Town due to a valve leak. The produced water, a waste byproduct of oil production, was contained within the dike around the well site and has been recovered, the company reported.

Oasis Petroleum reported Saturday that 245 barrels, or 10,290 gallons, of brine spilled Friday at a well about 6.5 miles south of Williston. The incident was caused by a valve or piping connection leak. The brine was contained to the well site and most had been recovered at the time the spill was reported.

On Sunday, Lime Rock Resources reported that 255 barrels, or 10,710 gallons, of brine spilled on Saturday at a central tank battery about 6 miles northwest of Manning. The incident was caused by an equipment failure. The brine was contained within the dike on the location. As of Sunday afternoon, about half of the brine the had been recovered.

Katie Haarsager, spokeswoman for the Oil and Gas Division, said initial reports indicate that freezing temperatures were a factor in all three incidents. Williston’s low temperature hit a record 43 degrees below zero on Friday, according to the National Weather Service.

State inspectors have been to each of the locations and will monitor additional cleanup.

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(Reach Amy Dalrymple at 701-250-8267 or Amy.Dalrymple@bismarcktribune.com)

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