Good Lord, would not all the soils (meaning the underlying strata) have been thoroughly(!!!) investigated before the Oroville (construction) project was even approved? Especially in CA?
We are not the Chinese... well... usually not...
Would not that soils information be public? Somebody needs to literally start digging that info. up, fast, before some idiot trying to CYA causes unnecessary deaths.
A high school buddy of mine is a foundation engineering expert — I’ll bet he’s “glued” to this story!
"You're a nosy fella, kitty cat, huh? You know what happens to nosy fellas? Huh? No? Wanna guess? Huh? No? Okay. They lose their noses."