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TBM Stuck on Pittsburgh North Short Connector Project

April 28, 2008 rockman Project Related Comments Off on TBM Stuck on Pittsburgh North Short Connector Project

ENR reports that a Tunnel Boring Machine or TBM is stuck for the second time in two weeks on Pittsburgh’s light rail expansion project dubbed the North Shore Connector Project. As we described in a previous post, the project will consist primarily of a tunnel underneath the Allegheny River.  The drilling began the week of March 3 and has been progressing at a rate of 30-ft/day or 5-ft/day faster than the original goals. Read on for a location map of the project, or download the Google Earth KMZ file showing the project area. (File photo of TBM)

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Brightwater Tunnel Boring Machine BT-2, nicknamed Helene. It was stuck some 300-ft underground for sever months while waiting for repair parts.
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King County, WA sues contractor on $1.8B Brightwater Sewer Project for cost and schedule overruns

June 29, 2010 rockman Project Related Comments Off on King County, WA sues contractor on $1.8B Brightwater Sewer Project for cost and schedule overruns

Current projections put the project completion 35-months behind schedule because of problems with a portion of the TBM constructed tunnel. The County is suing for $74M in damages associated with the delays. This massive sewer […]