(Reuters) - Shares of PG&E Corp fell 3 percent on Wednesday after federal filings showed that the power utility had delayed a safety overhaul of a high-voltage transmission line, a prime suspect behind the deadliest wildfire in California history.

FILE PHOTO - A PG&E truck carrying an American Flag drives past PG&E repair trucks in Paradise, California, U.S. November 21, 2018. REUTERS/Elijah Nouvelage

The company filed for bankruptcy protection in January in anticipation of liabilities from the wildfires, including the catastrophic 2018 Camp Fire that killed 86 people..

The Wall Street Journal earlier in the day reported that the company had told federal regulators in 2013 it planned to replace many of the towers, wires and hardware pieces on the line.

PG&E said the Journal report inaccurately portrayed planned electric transmission regulatory compliance work, and omitted key aspects of the work the company was doing to enhance safety.

“Our customers also should know that enhanced electric transmission and distribution inspections to help further enhance public safety are well underway. Specifically, PG&E is inspecting its electrical equipment in areas at elevated and extreme wildfire risk,” the company said.

The plans to replace components of the Caribou-Palermo line have been in the works since at least 2013, filings with the Federal Energy Regulatory Commision show.

The company said in 2017 that it would spend $30.3 million in 2018 to eliminate clearance issues on the line that were identified in 2013. The project was expected to be operative in December of 2018.

The Camp Fire broke out on the morning of Nov. 8 near the Northern California mountain community of Paradise. The cause of the blaze is still under investigation, though the utility reported to regulators that it experienced equipment problems on the Caribou-Palermo line around the time the fire began.

PG&E provides electricity and natural gas to 16 million customers in northern and central California and employs 24,000 people.

The company is seeking court approval for $5.5 billion in debtor-in-possession financing from J.P. Morgan, Bank of America, Barclays, Citi, and other banks, the sum being roughly the same as the utility’s annual spending.

PG&E has promised to keep working as it grapples with fire-related costs it estimates at more than $30 billion.

Shares of the company, which is due to report fourth-quarter results on Thursday, were down 3.1 percent at $17.94 in afternoon trading on Wednesday.