ORANGE (CBSLA.com) — A brush fire accidentally sparked by a Caltrans crew working near Irvine Lake was 90 percent contained Wednesday, authorities said.

The evacuation orders for the lake’s campground and 15 other structures in an unincorporated area near Orange were lifted Tuesday evening, according to the Orange County Fire Authority.

Santiago Canyon Road was reopened at the same time, Orange County Fire Authority Capt. Steve Concialdi said.

About 60 firefighters were deployed Wednesday, mostly for “mop-up” duty, Concialdi said. At the height of the fire, as many as 350 firefighters battled the blaze, which burned about 215 acres.

A Caltrans crew mowing brush in the area of the 241 Eastern Transportation Corridor and Santiago Canyon Road Monday apparently struck an object that caused sparks to ignite vegetation, Concialdi said.

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