The collision and power outage were reported in the area of Industrial Boulevard east of Hesperian Boulevard in Hayward around 5:40 a.m., PG&E spokeswoman Jana Morris said.
The crash brought down a 55-foot utility pole, knocking out power to 1,064 customers in Hayward and Union City, Morris said.
Power was restored to all customers as of 7:51 a.m., she said.
PG&E personnel will remain at the site of the downed pole throughout the day to make repairs.
