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Dam Solution?

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Alan Vos09/08/2019 19:01:25
162 forum posts
7 photos
Posted by John Olsen on 08/08/2019 23:40:02:

However they [properly bult earth dams] are vulnerable if water is able to overtop them, and the situation with this dam where the spillway concrete had failed would have much the same effect. Water running over the dam is quite capable of eroding the dam quite quickly and catastrophically.

This.

Eric Sinclair09/08/2019 19:46:56
9 forum posts
Posted by Michael Gilligan on 09/08/2019 18:18:56:
Posted by Eric Sinclair on 09/08/2019 17:54:00:

I'm interested to know how the 70% failure probability mentioned earlier was calculated. [ ... ]

.

Eric

Estimated [not Calculated] was the word that Bill used ...

From something [as yet uncorroborated] that I was told today; that estimate was a 'gut feel' based on one of the very early videos of the spillway event. ... These are probably worth a second look.

MichaelG.

But putting a number to a gut feel gives it an unwarranted weight. I wonder how much experience of similar circumstance the gut feel was based on. Unless it was vast I would argue that a numerical probability should not have been used. I stick by my gut feeling of the error bounds (noting the inconsistancy of that).

Michael Gilligan09/08/2019 21:10:17
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23121 forum posts
1360 photos

I have no desire to argue the point, Eric

MichaelG.

.

Meanwhile: here is a review [nice unconfrontational word, I hope] of the Toddbrook occurrence, by a Californian observer: **LINK**

https://m.youtube.com/watch?v=rxwfmuB-t1s

David Riley11/08/2019 21:46:30
12 forum posts

There is a cross section of Toddbrook Dam on the Waterways Archive.

http://collections.canalrivertrust.org.uk/bw101.2.1.6

Michael Gilligan11/08/2019 22:05:26
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23121 forum posts
1360 photos

Thanks, David !!

MichaelG.

Michael Gilligan03/09/2019 15:05:35
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23121 forum posts
1360 photos

NEWS Today:

**LINK**

https://www.bbc.co.uk/news/uk-england-derbyshire-49566517

... This enquiry will, I suspect, be interesting

MichaelG.

Michael Gilligan17/06/2021 19:50:00
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23121 forum posts
1360 photos

.

UPDATE:

Nearly two years later … we have a plan **LINK**

https://canalrivertrust.org.uk/about-us/where-we-work/north-west/restoring-toddbrook-reservoir

MichaelG.

Oven Man17/06/2021 20:12:01
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204 forum posts
37 photos
Posted by Michael Gilligan on 17/06/2021 19:50:00:

.

UPDATE:

Nearly two years later … we have a plan **LINK**

https://canalrivertrust.org.uk/about-us/where-we-work/north-west/restoring-toddbrook-reservoir

MichaelG.

And this isn't the only job that thr CRT have got on. Harthill reservoir near Rotherham is due to have its valves and spillway upgraded next year, probably as a result of the Todbrook episode.

Peter

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