Flooded third bore of Caldecott reopened to traffic 

The third bore of the Caldecott tunnel, closed around noon due to flooding caused by a blocked drain, has reopened to traffic but will close again tonight for further work, Caltrans officials said this afternoon.

Flooding inside westbound bore No. 3 prompted its temporary closure while crews investigated whether there was a drainage problem inside the tunnel, CHP Officer Kevin Kroncke said.

The closure created a traffic backup in both directions, according to the California Highway Patrol.

Drivers headed west on state Highway 24 were directed to the middle bore, CHP Officer Sam Morgan said. Normally on weekday evenings, the middle bore is used for eastbound commute traffic.

Caltrans officials said they determined that the flooding was caused by a blocked drain, but was unable to clear the drain completely this afternoon. The third bore was reopened around 3:30 p.m., but will be closed again tonight at 10 p.m. to complete debris removal.

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