The Knoxville fire – which began at 2:45 p.m. Saturday off of Berryessa-Knoxville Road, two miles north of Lake Berryessa – had burned 508 acres by Sunday evening, according to Cal Fire.
Cal Fire said containment grew to 80 percent on Sunday, with full containment expected at 10 a.m. Monday.
No structures were threatened and no evacuations were necessary, with the terrain extremely rugged and steep, Cal Fire said.
Lake Berryessa is not impacted by the wildland fire, and the lake is open to visitors, Cal Fire noted.
The agency said the cause remains under investigation.
At the height of the firefighting effort there were 566 personnel on scene, which decreased to 253 by Sunday evening, according to the most recent Cal Fire report.
Local firefighters were taking part in the effort, with Lake County Fire Protection District, Northshore Fire Protection District and South Lake County Fire Protection District among the cooperating agencies, along with Cal Fire, Napa County Fire, California Department of Corrections and Rehabilitation, California Highway Patrol, California Department of Fish and Game and Bureau of Land Management.
Resources on scene Sunday included 15 engines, 10 fire crews, three helicopters, two dozers and four water tenders, Cal Fire said.
Cal Fire said firefighters were continuing to construct and improve containment lines, and had half a mile of containment line to build. They were also improving and holding fire lines, puting out hot spots, mopping up and patrolling the site.
Berryessa-Knoxville Road will be closed until noon on Monday, Aug. 15. The road is closed in two locations, according to Cal Fire – two miles north of Lake Berryessa and three miles south of the Napa-Lake County line.
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