LIVERMORE (CBS SF) — Alameda County Fire Department, Livermore-Pleasanton and CalFire firefighters had 90 percent containment Sunday night on two separate grass fires.

The fires burned a total of about 60 acres along state Highway 84 between the Ruby Hills area southwest of Livermore and the GE Hitachi Nuclear Energy Center.

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Livermore-Pleasanton Fire Department firefighters responded to the initial alarm at about 3:50 p.m., and were joined by firefighters from the Alameda County Fire Department and CalFire.

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The fire agencies mobilized 30 engines, two tankers, helicopters and two bulldozers to fight the fast-moving fires, and it took about two hours to achieve 90 percent containment, said Aaron Lacey, a battalion chief with Livermore-Pleasanton Fire Department.

The California Highway Patrol closed some lanes of Highway 84 in the Pigeon Pass area at the height of the firefighting work.

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No injuries were reported, and no structures were burned, but some PG&E power poles sustained damage, Lacey said.