Followup on Oroville
Here's an HCN article on the expert report on the Oroville Dam incident in 2017, when the dam was nearly lost due to overfilling:
What went wrong at Oroville?
From the article:
[The report]...describes the physical factors that caused the spillways to crumble, problems like unstable rock foundations and cracked concrete that allowed water beneath the main spillway.
The report also highlighted human and organizational errors, including faulty design details, shortsighted inspections and “overconfident and complacent” management by the California Department of Water Resources. The department “take(s) the findings very seriously,” said then-director Grant Davis in a statement. “We will … incorporate the lessons learned going forward.”
Nothing in the world is more yielding and gentle than water. Yet it has no equal for conquering the resistant and tough. The flexible can overcome the unbending; the soft can overcome the hard. - Lao Tse