Risk of Anderson Dam Failure From Earthquakes
Updated findings from an ongoing study of Anderson Dam were released in October, 2010 indicated that the dam could fail if a magnitude 7.25 earthquake occurred within 2 kilometers of the dam, potentially releasing a wall of water 35 feet high into downtown Morgan Hill in 14 minutes, and 8 feet deep into San Jose within three hours. In response SCVWD has lowered the water to 54% full, which is 60 feet below the dam crest. According to the SCVWD, remediation of the problem will likely require lengthy construction that would take up to six years and cost as much as $100 million.
Because Coyote Reservoir Dam was built right across the Calavaras fault and there is a substantial risk of a seismic-triggered landslide on the east side of the reservoir at the dam site, an earthquake could cause failure of this dam upstream of the Anderson Dam, and the release of water could increase risk of failure of the Anderson Dam.
Read more about this topic: Coyote Creek (Santa Clara County)
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