BarbaraRose wrote:Gonna be a rough spring up that way this year again.
Maybe, maybe not. "Spring" here usually lasts about three days or so. There will be one final, cold, rainstorm (temps maybe in the 50's) a couple of days after the storm is over temps will often jump to the low 90's.
Instant summer.
BarbaraRose wrote:I assume they got that spillway fixed and in working condition? I hope you don't need to evacuate, but good to be prepared just in case.
Thanks for asking.
We are all hoping that it is fixed, and in working condition. LOL. It has yet to be "tested", meaning that the water level behind the dam has not been high enough - yet - to be let out the flood gates, and then on down the spillway.
Thus, the newly (last year) completed "reconstruction" of the spillway (it was torn out and totally rebuilt, at around the cost of a billion) has yet to have any dam water
run down it.
Oh, yes.
It has been reported that "hairline" cracks (whatever that means) have developed on the surface of this new concrete.
DWR (California Department of Water Resources) tells the public that this is "absolutely no problem" and that "it always happens" (this is the same organization that told the public that the emergency spillway was "perfectly safe" an hour or so before 180,000 people were evacuated, because it was about to fail).
So, of course, we all should trust DWR. Absolutely. Hah.
Feds Ask State to Explain Cracks in New Oroville Spillway Concretehttps://www.kqed.org/news/11633422/feds-ask-state-to-explain-cracks-in-new-concrete-on-oroville-spillway"Robert Bea, a
professor emeritus of civil engineering at UC Berkeley and a veteran analyst of structure failures, said that DWR's letter leaves "a lot of uncertainties regarding the implications of the reported micro-cracking."
Bea, who heads a Berkeley-affiliated group that has issued several reports this year highly critical of DWR's management of the Oroville facility, added that
cracks in the concrete surface are potentially serious and require urgent attention.
"
Cracking in high-strength reinforced concrete structures is never 'to be expected,' " Bea said in an email. Even small cracks could increase stresses in the concrete when it is under "service loading" -- for instance, when large volumes of water hurtle down the structure at speeds approaching 90 mph.
The cracking also "develops paths for water to reach the steel elements embedded in the concrete and accelerate corrosion," Bea said. "
Such corrosion was responsible for the degradation and ultimate failure of the steel reinforcing in parts of the original gated spillway"
Probably the spillway is ok. Maybe. I hope.
If it keeps raining like it has, we are probably going to find out in pretty short order.
Anne