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NORFOLK (AP) -- A state transportation spokeswoman says the Hampton Roads Bridge Tunnel wasn't damaged when a fire suppression and valve system was activated by accident.

The system's activation last week sent a deluge of water onto eastbound traffic inside the tunnel.

Virginia Department of Transportation spokeswoman Marshall Herman tells The Virginian-Pilot that the agency is investigating the incident.

Herman says the valve system activated as a VDOT contractor was performing a routine weekly system check.

The eastbound tube was closed while the water drained.

Herman says the incident was an inconvenience to motorists. But she says it showed that the tunnel's fire protection system worked as designed in the event of a vehicle fire.

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