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Caltrans removes concrete chunk from Webster Tube

Submitted by on 1, February 5, 2009 – 7:55 amNo Comment

Caltrans crews have removed a 24 foot by 20 foot chunk of concrete from the ceiling of the Webster Tube following inspection of both the Webster andPosey tubes earlier this week.

The inspections came after an 8 foot by 8 foot piece of concrete fell from the ceiling into the roadway of the Webster Tube (the one that runs from Oakland to Alameda) on January 25.

Caltrans spokesman Allyn Amsk said the one to one-and-a-half inch thick slab was removed from the ceiling at the mouth of the Tube when inspectors discovered it was “delaminating,” meaning it was not sticking well in some places. The slab was taken out Monday and Wednesday nights.

He said the concrete wasn’t loose or falling, but inspectors “were tapping around and heard some things they were uncomfortable with. So they took it out.”

Amsk said inspectors are continuing to review inspection reports for the Alameda-to-Oakland Posey Tube, where they discovered the same issue with some of the concrete Tuesday night, and they are deciding whether to repair or remove it. But he said the Tube is safe to travel through in the meantime.

“Caltrans is really concerned about safety,” he said. “I was assured that if there was anything unsafe about that, they would shut the Tube.”

Amsk said the concrete is cosmetic and was placed in the tubes’ ceiling in 2004. He said it was laid in place of tiles removed during a retrofit of the tubes.

Stay tuned for updates.

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