WSDOT announced on Valentine’s Day that the plan to repair the damaged Bertha TBM was not ready yet, as engineers from Hitachi Zosen, the machine’s manufacturer, would need until the end of the month to have the plan ready. They did say maintenance would need to be done in front of the face, requiring the construction of a vertical shaft. It sounds like more work for STP JV team member Malcolm Drilling, and they may already have started on it. We’ll keep you posted. [Source: WSDOT. Image: Seattle Times]
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Pittsburgh PA Light Rail Tunnel Construction and Cost Overruns
The Port Authority of Allegheny County (Pittsburgh, Pennsylvania) has a major transit improvement project dubbed the North Shore Connector. Its main components are twin bored tunnels 1.2 miles long that will connect the Port Authority’s Light Rail Transit system, the T, 1.2 miles from the Gateway Subway Station underneath Stanwix Street and the Allegheny River to the North Shore. It will travel under the river and provide three new stations and allow for future improvements beneficial to future development and continued downtown revitalization. The $435 million project is making news recently for cost increases, drawing comparisons to Boston’s Big Dig much to the dismay of the Port Authority. Read on for project maps, links and more info.