Project
EBMUD's seismic upgrade of the Claremont Water Tunnel has completed the mining phase as of November 1, 2005. The tunnel will be lined with reinforced concrete 1'5" to 2'5" thick. The western outlet is at Chabot and Golden Gate Avenues. Contractor is Atkinson Construction.
Claremont Water Tunnel; western outlet at Chabot and Golden Gate Avenues
EBMUD is undertaking a major $31 million seismic retrofit of the Claremont Water Tunnel, the 'crown jewel' of the local water system. Work involves blasting a bypass through the hill around the most vulnerable section crossing the Hayward Fault, and filling voids between the pipe and tunnel wall with new grout. Work started the prior summer and is scheduled for completion by June 2006.
EBMUD's seismic upgrade of the Claremont Water Tunnel has completed the mining phase as of November 1, 2005. The tunnel will be lined with reinforced concrete 1'5" to 2'5" thick. The western outlet is at Chabot and Golden Gate Avenues. Contractor is Atkinson Construction.
“The Claremont Water Tunnel — the 'crown jewel' of the local water system, is being upgraded to avoid service disruption by an earthquake. Work started last summer and is scheduled for completion by June of 2006.”2005_04 - Seismic Retrofit for Claremont Water Tunnel article
“The purpose of the seismic upgrade is to prevent an interruption in water delivery in the event of a major quake. The 9-foot Claremont Water Tunnel crosses the Hayward Fault 130 feet below Tunnel Road.”2005_04 - Water Tunnel Retrofit article
“Mining was completed November 1. The tunnel will now be lined with reinforced concrete that is 1'5" to 2'5" thick.”2005_12 - Article on EBMUD tunnel project