Sheriffs officials are now saying PG and E will be shutting off electricity from Big Oak Flat to the Yosemite park boundary at 5 p.m. this evening.
This is being done as a precautionary measure when bomb disposal team detonates that pipe bomb found along the highway this morning at Memorial Drive.
PG and E says the outage will affect 372 of their customers in the Groveland area.
Authorities say homes and businesses in the Highway 120 corridor will be without power up to a half hour during that time. No estimate when power will be turned back on.