Whaley Bridge evacuated as dam starts to crumble after heavy rain
Whaley Bridge evacuated as dam starts to crumble after heavy rain
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Whaley Bridge evacuated as dam starts to crumble after heavy rain
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RE: Whaley Bridge evacuated as dam starts to crumble after heavy rain
Basically it's 180 years old, built mainly of earth and possibly some clay. Built to feed the peak forest canal which is still in operation as a leisure canal and apparently now also a wildlife refuge.
They are basically draining it as fast as they can via the normal feed into the canal.
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RE: Whaley Bridge evacuated as dam starts to crumble after heavy rain
https://www.youtube.com/watch?v=Zm_MMRA9Szk
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RE: Whaley Bridge evacuated as dam starts to crumble after heavy rain
The news over here is just overreaction. Nobody has attempted to explain how it's supposed to work and what appears to have gone wrong. Many viewer questions along the lines of: "Why can't they just pour quick-setting concrete into the hole?".
Steve
RE: Whaley Bridge evacuated as dam starts to crumble after heavy rain
Keith Cress
kcress - http://www.flaminsystems.com
RE: Whaley Bridge evacuated as dam starts to crumble after heavy rain
As far as I can tell no. If water starts spewing from a dam hole then it is usually all over, especially if it is an earthen damn.
This isn't too different Oroville damn spillway failure.
https://www.eng-tips.com/viewthread.cfm?qid=420883
To summerise:
Water was flowing down the spillway as designed but due to poor design/maintenance the concrete spillway failed enabling significant erosion on the back side of the dam. If such a scenario continues damn collapse is almost inevitable.
(I typed all the above quickly. So if anybody spots any mistakes I've made then please forgive me and correct me.)
This posted above explains it better:
https://www.youtube.com/watch?v=Zm_MMRA9Szk
RE: Whaley Bridge evacuated as dam starts to crumble after heavy rain
That's what I was thinking but if that was a spillway that explains the possibility of avoiding a catastrophe.
Thanks for clarifying that.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Whaley Bridge evacuated as dam starts to crumble after heavy rain
RE: Whaley Bridge evacuated as dam starts to crumble after heavy rain
Weather warnings for today.
Getting the level down is going to be an issue.
RE: Whaley Bridge evacuated as dam starts to crumble after heavy rain
[edited for clarity]
I'd say theat the dam is like a poorly maintained, loaded gun that the community have been living with for nearly 200 years.
Steve
RE: Whaley Bridge evacuated as dam starts to crumble after heavy rain