SF Twin Peaks Tunnel worker dies after hit by steel beam

- A construction worker on the Twin Peaks Tunnel Project was hit Friday by a steel beam and taken to a trauma center where he died, San Francisco Mayor London Breed confirmed Saturday. 

The worker, who has not been identified, was struck by the beam shortly after 4:30 p.m. Friday on the West Portal side of the tunnel, officials with the San Francisco Municipal Transportation Agency said. The victim was taken the Zuckerberg San Francisco General Hospital 

San Francisco Mayor London Breed said the police and OSHA are investigating the incident. 

“We are saddened to hear about the passing of a signal technician who was working in the Twin Peaks Tunnel yesterday evening," said Breed in a statement. "Our sincerest condolences are with his family, friends, and colleagues at this time."

The tunnel goes under the Twin Peaks and extends from West Portal to the San Francisco Municipal Railway's Eureka Valley station. 

The worker was an employee for Shimmick Construction, transit officials said. Shimmick Construction's corporate office is in Oakland, according to the company's website. 

Bay City News contributed to this report.

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