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Dozens of California Dams Need Repair as El Niño Winter Draws Closer
The audit says repairs could cost more than $28 billion and warns that failures could endanger 1.5 million people.
A report released Monday by the State Auditor identified 57 dams in poor or unsatisfactory condition, with 40 rated as high or extremely high hazard as of May.
Most of California's nearly 1,500 dams are aging, with the 40 riskiest clustering near densely populated coastal cities including Los Angeles, San Diego, and the Bay Area.
Failure of these riskiest dams could endanger 1.5 million people and cause more than $265 billion in economic damage; Water Resources has yet to approve emergency plans for 245 dams.
Tom Gleason, director of Water Resources, criticized the audit for a "fundamental lack of understanding" of flood management complexities, noting some deficiencies stem from updated safety standards rather than degradation.
Nationwide, the American Society of Civil Engineers estimates nearly 17,000 dams are potentially high hazard, while the State Auditor warns California's aging dams "continue to pose a risk to public safety" as heavy rain approaches.