A nifty BIM-type view of the proposed bored tunnel for Washington SR 99, the tunnel to replace the aging Alaskan Way Viaduct along Seattle’s waterfront. It’s pretty neat to see the piles and foundations for other structures and major utilities as the bore passes by them. A little on the longer size, at around 5 minutes.
Geologic Hazards
Seismic upgrade of San Francisco’s huge water system moves into high gear to prepare for the next big quake
The San Francisco Public Utility Commission has a $4.6B program in place to try and make the water storage and supply system for the Bay Area ‘earthquake proof’ by 2015. It involves 86 separate projects, […]
Project Related
Seattle tunnel will go under 158 buildings
The tunnel replacing the Alaskan Way Viaduct (SR-99) will pass beneath 158 existing structures requiring an extensive program of vibration and settlement monitoring as well as some remediation. Of the 158 buildings, WSDOT identified 20 […]
Miscellaneous
Port Authority Covers Hudson Subway Tunnels with Blast Shields to Protect Against Terror Attacks
The century-old PATH subway tunnels underneath the Hudson River were not excavated through bedrock, but rather under a thick layer of silt and clay. Apparently there is a a sufficient security concern to warrant protecting […]