7/2/2023 0 Comments Seismac on yosemite![]() Additionally, the Calaveras Fault runs through the reservoir and within 1,500 feet of the existing dam. The Calaveras Dam is located in the East Bay, approximately 15 km northeast of the city of San Jose. Additionally, the largest project, which gained more public attention in recent days, is the Calaveras Dam Replacement Project. Some of the completed projects include seismic upgrades to pipelines along the Peninsula, and a seismically-designed lifeline which carries water from the East Bay to the Peninsula. Now, nearly 15 years after the bond’s approval, the entire program is approximately 91% complete. As it winds its way for approximately 230 km, it crosses three major faults, the San Andreas, Hayward, and Calaveras, each of which pose great hazards. Such a project is significant as the system extends from San Francisco to Yosemite National Park. Included in this plan were steps to reduce the vulnerability of the system to damage from earthquakes. (Image from San Francisco Public Utilities Commission)īack in 2002, San Francisco voters approved a bond measure to fund a $4.8 billion project to significantly improve the Hetch Hetchy Regional Water System. Therefore, the scope of the project is significant. This map shows how the Hetch Hetchy Water System crosses three major faults, the San Andreas, Hayward, and Calaveras, between San Francisco and Yosemite National Park. Fortunately, not all dams are like this, and in many cases in the Bay Area, projects are either underway or have been completed to reduce the vulnerability of water resources to earthquakes. Over the last few days, we have focused on two dams that have been in the public spotlight due to fears of catastrophic failure either by erosion or earthquake. (Photo from Water System Improvement Program Sunol Valley) Building began in 2011, and is scheduled to be finished in 2019. ![]() Check your seismic hazard rank This photo show the scale of the project to construct a new Calaveras Dam 14 km northeast of San Jose.
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