BISMARCK, N.D. - A 30-gallon release of hydraulic oil in was reported in Williams County. The spill occurred while Zavanna, LLC was pumping water from the Little Muddy River to use for enhanced oil recovery.
The incident took place about 7 miles northeast of Williston on January 12 and was reported to the North Dakota Department of Environmental Quality two days later.
The cause of the spill was a failed seal on a water heater unit.
To date, 10 gallons have been recovered. The remaining oil spill onto ice along the Little Muddy River, with an estimated 5 gallons spilled into the river.
NDDEQ has inspected the site and will continue to monitor the investigation and remediation.