WILLARD -- Officials are crediting a beaver dam with helping contain a diesel fuel spill at Willard Bay State Park.
More than 8,000 gallons of diesel fuel spilled from a leaky pipeline has been recovered so far, an executive of Chevron Corp. said Wednesday.
Terry Duhon, vice president of Chevron's midcontinent region, addressed efforts to clean up the spill during a news conference at the company's South Salt Lake offices.
Since Monday's discovery of the leak from an 8-inch pipeline, 195 barrels of fuel have been collected from 7 acres at the park, Duhon said. He did not say how much fuel has leaked from the pipeline, which has been closed off at the park.
"We continue to monitor the situation and are working closely with the U.S. Environmental Protection Agency and state Department of Environmental Quality," Duhon said, adding the cause of the leak remains under investigation.
Chevron wants to determine what caused the leak to ensure it doesn't happen again, he said.
John Whitehead, assistant director for the state Department of Environmental Quality, said it's too early to determine if the company will face civil penalties for the spill, adding his office is concentrating on cleanup efforts at this time.
In 2010, Chevron spent $75 million to clean up environmental damage caused by two oil pipeline leaks along Red Butte Creek in Salt Lake City.
Federal regulators determined 10 hours passed in June 2010 before Chevron discovered a leak in a 10-inch pipeline that delivers crude oil 182 miles from Rangely, Colo., to Chevron's Salt Lake City refinery.
The leak occurred in the mountains near the University of Utah and sent 33,000 gallons of oil into the creek.
About 300 birds were coated in oil and had to be cleaned at Utah's Hogle Zoo. Fewer than 10 died.
Chevron was fined $423,000 after regulators determined the oil company needed better leak-detection safeguards.
There was another accidental release on the same pipeline of about 500 gallons just six months later. Officials blamed a frozen valve. That oil did not make it to the creek.
About 50 workers are at Willard Bay State Park, removing the fuel. The fuel leaked into a retention pond but did not flow into Willard Bay because of the beaver dam.
The 63-year-old pipeline extends from Salt Lake City to Burley, Idaho. Duhon declined to say when Chevron last inspected the section of pipeline that leaked.
Cleanup could take more than a week, said Jeffery D'Agostino, a spokesman for the Bureau of Reclamation, which owns the 10,000 acres where the park sits.
The beaver dam prevented the spill from reaching Willard Bay, D'Agostino said.
Two beavers covered in fuel were cleaned Tuesday at the Wildlife Rehabilitation Center in Ogden. There have been no other reports of injuries to wildlife.
Willard Bay's north marina will remain closed until the task is finished, D'Agostino added.
Willard Bay's south marina, which had been closed for winterization, reopened Wednesday to accommodate campers and anglers, said Utah State Parks spokeswoman Deena Loyola.
The spill occurred north of Eagle Beach, near Cottonwood Campground.
Crews have placed flotation booms to collect the spilled fuel. Absorbent pads are also being used to soak up the fuel, and vacuum trucks are sucking up contaminated water for treatment.
The Associated Press contributed to this article.