"The Alaskan Way Viaduct and nearby soil have sunk 1.2 inches this fall alongside stranded tunnel machine Bertha, senior state engineers said Friday afternoon. The settling shows that the tunnel team is having trouble controlling the soil, crucial to protecting downtown as the Highway 99 tunnel project attempts to move ahead."
“Originally they said the viaduct has settled 6 inches in the last 15 years,” he said. “And we were told it could go another inch before it would be too dangerous to be on.”
So he said there could be major problems if it sinks just 6/10th of an inch more.
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