Hydroblasting work starts on Oregon City Bridge

By: Sue Vorenberg//February 18, 2011//

Hydroblasting work starts on Oregon City Bridge

Sue Vorenberg//February 18, 2011//

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Crews from Wildish Standard Paving have started hydroblasting work to clean off the inside arch on the West Linn side of the Oregon City Bridge.

The effort is part of a $10.6 million, 2-year effort by the Oregon Department of Transportation to renovate the 88-year-old bridge, which began in January.

Hydroblasting removes the concrete coating of the bridge, called gunite, so that engineers can take a closer look at the steel structure underneath and see if it is corroded or damaged.

After the examination, the structure will be repaired and the coating will be replaced with shotcrete, another type of spray concrete, said Susan Hanson, ODOT spokeswoman for the project.

Wildish crews also ramped up work this month to add support structures to the bridge in order to even out weight so the columns can be inspected and repaired.

When work on the West Linn side of the bridge is finished, crews will move to the Oregon City side and repeat the process – likely starting sometime in March, Hanson said.

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