FAIRFAX, Calif. (KGO) -- CHP officials told ABC7 News a construction worker was operating a piece of heavy equipment when it became unstable and rolled approximately 200 feet down an embankment off of Iron Springs Road in Fairfax Monday morning.
Emergency crews transported the man to John Muir Medical Center in Walnut Creek in critical condition.
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Stay with ABC7 News for more on this developing story.
An emergency helicopter is seen off Iron Springs Road in Marin, Calif on Monday, October 23, 2017. (KGO-TV)