US Forest Service investigators working to determine the cause of the Mosquito Fire have taken possession of one of Pacific Gas and Electric’s transmission poles and attached equipment. According to a report released by the company September 24, the Forest Service said the fire started in the area of one of the company’s power lines on Forest Service land. PG&E is conducting their own investigation of the cause of the fire.

The agency has not released the cause of the fire which has burned 76,781 acres and destroyed 78 structures near Foresthill, California 35 miles northeast of Sacramento.

In October, 2020 investigators from the California Department of Forestry and Fire Protection looking for the cause of the Zogg Fire southwest of Redding seized PG&E equipment. The fire which burned 56,338 acres, destroyed 204 structures, and resulted in four civilian fatalities, was caused by a tree contacting a power line operated by PG&E. In September, 2021 the company was charged with manslaughter and dozens of other charges related to the fire.

In 2018 investigators seized parts of a 99-year old PG&E transmission tower at the origin of the Camp Fire which burned into Paradise, California killing at least 85 people and making thousands homeless. In May, 2019 CAL FIRE announced that their investigators determined the fire was caused by the power line.

The Wall Street Journal (subscription) reported that investigators attributed more than 1,500 fires to PG&E power lines and hardware between June 2014 and December 2017. In 2021 we put together a list of 18 fires, mostly large, attributed to failures on PG&E power lines between 1999 and 2020.

Firefighters are mopping up the Mosquito Fire, which received substantial amounts of rain last week. It is still staffed by 1,248 personnel.

Thanks and a tip of the hat go out to Kelly.