A 2020 inspection revealed external corrosion along a 22-foot section of pipe in the same area as the spill.
Most of the fuel drained into two artificial ponds called “borrow pits” and thousands of fish, birds and other animals were killed, state and local officials said. Most of the fuel was recovered, according to the pipeline owner.
The spill from the 16-inch-diameter line operated by Collins Pipeline Co. was discovered Dec. 27 near a levee in St. Bernard Parish, just east of New Orleans, according to documents from the Pipeline and Hazardous Materials Safety Administration.
An inspection of the 42-year-old Meraux Pipeline more than a year earlier, in October 2020, revealed external corrosion along a 22-foot section of pipe in the same area as the spill. But repairs were delayed and the line continued operating after a subsequent inspection indicated the corrosion was not bad enough to require work immediately under federal regulations, according to the pipeline agency.
The spilled fuel also contaminated soil in an environmentally sensitive area near the Mississippi River Gulf Outlet, a closed canal, according to state and federal officials. A small amount of diesel remains in the two borrow pits, said Louisiana Department of Environmental Quality spokesman Gregory Langley.
The spill killed 2,300 fish and more than 100 other animals, including 39 snakes, 32 birds, a few eels and a blue crab, according to statistics provided by Robert “Trey” Iles, a spokesman for the Louisiana Department of Wildlife and Fisheries.
Nearly 130 animals — 72 alligators, 23 birds, 20 snakes and 12 turtles — were captured for rehabilitation, he said.
Diesel is a highly toxic petroleum product that can kill fish and plants that come into direct contact with it, according to the National Oceanic and Atmospheric Administration. Fuel from small spills can evaporate or disperse naturally in just a couple of days but larger spills can take months to degrade.
A pipeline safety advocate said it was “maddening” that the corrosion was known about for more than a year prior to the spill yet fuel kept flowing through the 125-mile-long line from Chalmette to a storage terminal in Collins, Mississippi.
“It’s especially maddening to learn that Collins Pipeline’s initial analysis deemed the pipe in such poor condition that it warranted an immediate repair,” said Bill Caram with the Pipeline Safety Trust. The Bellingham, Washington-based organization advocates for more stringent oversight of the nation’s sprawling network of pipelines transporting oil, natural gas and other hazardous fuels.
Collins Pipeline is a subsidiary of Parsippany, New Jersey-based PBF Energy Inc., which owns six petroleum refineries in the U.S. including the Chalmette Refinery in St. Bernard Parish.
The company has repaired the line since the spill and resumed operations, PBF Vice President Michael Karlovich told The Associated Press in an email Wednesday.
Karlovich said work to recover fuel that spilled into the artificial ponds had been completed with about 323,000 gallons of diesel collected — a figure that includes both spilled fuel and diesel that was remaining inside the pipeline after the accident. He did not provide a breakdown.
“Although we continue to remediate and monitor the area, on-water recovery operations have been completed,” Karlovich said. He said the site was about 4.5 miles from the Mississippi River, not just a few hundred feet away as federal officials had said.
In an order to PBF Chairman Thomas Nimbley describing the steps the company had to take before it restarted the line, the associate administrator of the federal pipeline safety agency, Alan Mayberry, identified the probable cause of the spill as “localized corrosion and metal loss” based on preliminary reports.
More than two months before the spill, a PBF Energy representative said in an October 2021 email to federal pipeline regulators that the company had completed repairs on another flawed section of the line, but was still awaiting approval to address the corrosion found in the vicinity of the rupture site, according to federal records.
The company already had reduced pressure inside the line in November 2020, shortly after the corrosion was first found. The company reduced the pressure it slightly more in November 2021 because it had not repaired the line within a time frame required under federal regulations, according to pipeline officials.
The spill had not been previously publicly reported.
Federal regulators have initiated six enforcement cases against Collins Pipeline since 2007. They include a 2021 warning letter alleging management problems at the company’s pipeline control room in Texas and a 2011 warning for not conducting external corrosion tests frequently enough, federal records show.
No fines or other penalties were levied against the company, according to the records.