Larry Keyser, third from left, hugs volunteers from Samaritan's Purse disaster relief after they helped him sift through remains of his family's home destroyed by fires in the Coffey Park area of Santa Rosa, Calif., Wednesday, Nov. 8, 2017. Rumbling front loaders began scraping up the ash and rubble of nearly 9,000 destroyed homes and other structures in Northern California this week as the U.S. Army Corps of Engineers launched a new phase of the largest wildfire clean-up in the state's history.
SAN FRANCISCO — The deadliest of last month’s wildfires in California’s wine country may have been started by electrical equipment not owned or installed by Pacific Gas and Electric Co., the utility said in a court filing.
PG&E said in a legal filing Thursday that a preliminary investigation suggests that a private power line may have started the blaze that killed 21 people and destroyed more than 4,400 homes in Sonoma County. Another 22 people were killed and at least 4,500 more structures were destroyed in Northern California wildfires that began Oct. 8.
Although the cause of the fire that decimated a Santa Rosa neighborhood has not been determined, “preliminary investigations suggest that this fire might have been caused by electrical equipment that was owned, installed and maintained by a third party,” PG&E attorneys wrote in the filing with the Judicial Council of California, the policymaking body of California courts.
PG&E did not name the third party but referenced a location in neighboring Napa County where CalFire investigators have zeroed in as they try to determine the cause of the blaze.
Lynn Tolmachoff, a spokeswoman for the California Department of Forestry and Fire Protection, said she couldn’t comment on the filing due to the ongoing investigation, “but we’ll take anything that PG&E submits to us as part of that investigation.”
The filing comes in response to 15 wildfire-related lawsuits against PG&E. It gives no supporting evidence other than referring to an electric incident report that the utility submitted to state regulators on Nov. 2 where it documented 10 cases in Sonoma and Napa counties of toppled trees, downed lines and other damaged equipment. The report does not say whether those incidents may have caused or contributed to the fires.
In that report, the utility noted CalFire investigators took possession of equipment at a fire damaged home near Calistoga, including a “secondary service line that had detached from the fire-damaged home.”
“Cal Fire also took possession of multiple sections of customer-owned overhead conductor that served multiple pieces of customer-owned equipment on the property,” PG&E said.
Earlier this year, the California Public Utilities Commission fined PG&E $8.3 million for failing to maintain a power line that sparked a massive blaze in 2015 Amador County that destroyed 549 homes and killed two people. A state fire investigation found the utility and its contractors failed to maintain a gray pine tree that slumped into a power line igniting the fire.
On Wednesday, the commission proposed a new set of tougher safety rules for power lines, phone lines and utility poles in parts of the state prone to fires.
According to the proposed rules, tree branches would have to be kept farther away from power lines, newly installed lines would have to be spaced farther apart from each other and utility companies would have to fix many safety problems in areas of high fire risk before making repairs in lower-risk zones. Those repairs would have to follow a set timetable, taking no longer than six months in extreme fire-risk zones.
The commission could vote on the new rules as early as Dec. 14.
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