Seismic upgrade of San Francisco’s huge water system moves into high gear to prepare for the next big quake

Claremont Tunnel - a water supply tunnel that crosses the Hayward Fault

Claremont Tunnel - a water supply tunnel that crosses the Hayward Fault

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, some already underway with others beginning in 2011. I’m not sure if the Claremont Tunnel Project is considered part of these projects, but it was designed to accommodate over 7-ft of horizontal offset on the Hayward Fault and not disrupt water flow in the tunnel. You can read about that project on GeoPrac. [Source: ENR via ASCE SmartBrief. Image: Sue Bednarz, Jacobs Associates, Inc. by way of Civil Engineering Magazine]