Engineers at Oroville Dam in northern California are about to start rebuilding two giant spillways that collapsed after heavy rains in February. State water officials also promise a full “forensic review” of the near-catastrophic failures, which forced mass evacuations.
As Craig Miller ( @voxterra) of Here & Now contributor KQED explains, that includes a hard look at the geology underlying the spillways, something that appears to have gotten short shrift when the dam was built 50 years ago.
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