Rising Costs and Delays in Seattle Area Wastewater Plant and Tunnels

This is an interesting video of crews changing cutterhead teeth on the Bertha TBM beneath downtown Seattle. [Source: WSDOT YouTube Channel. Image: YouTube]

Today crews on the Devil’s Slide bypass tunnels will break through after more than 3 years of excavation work. The pair of 4,000-ft long tunnels will each convey Highway 1 past a dangerous and landslide-prone […]

Grouting work done earlier in the week was a possible cause of a bulge in the lining of a train tunnel under the River Thames. Two trains hit the bulge before the line was closed, […]