Whaley Bridge - Toddbrook Reservoir Damage

[fossyant]

That's why I don't think we should be 'concerned'. I'm local (8 miles away) and have been checking, and that pattern on the right hasn't changed. The grass errosion was a worry also at first...

So long as they keep it down/drained, then affect repairs, it should be OK. Won't be a quick fix though....

 

[fossyant]

That's a noble sacrifice, surely the aggregate and concrete should be sufficient!

That's enough about my country bumpkin neighbour....

 

[NorthernDave]

View attachment 478971

Thunderbirds are go

I can only presume that Derbyshire Constabulary don't wear hats any more?

 

[perplexed]

I can only presume that Derbyshire Constabulary don't wear hats any more?

Not as tall as they used to be...

 

[Ming the Merciless]

View attachment 478971

Thunderbirds are go

Rachel Swann warns of the dangers of sticking your fingers in the socket.

 

[Rezillo]

By way of light relief, here's me at the failure point of a 200m long 12th century dam. It was only 4m high but it held back a pond 550m long and up to 300m wide. The spillway was a few metres to the left but the failure occured through water leaking through the unstable hillside to the right. The entire (shallow) hillside was washed away and a 5m deep channel was carved out. A few hundred metres further down, the water flowed round to the right after wiping out a small settlement, creating eddies that gouged out bowl depressions that can still be seen in Lidar today.

There was a medieval profession of pondcaster, whose job was to drain dams to maintain them and clear out silt thought to be harmful to fish health. The aristocracy ate freshwater fish on days when eating meat was not permitted and these large ponds were used to breed fish and eels. It must have have been quite a hazardous job

 

[fossyant]

By way of light relief, here's me at the failure point of a 200m long 12th century dam. It was only 4m high but it held back a pond 550m long and up to 300m wide. The spillway was a few metres to the left but the failure occured through water leaking through the unstable hillside to the right. The entire (shallow) hillside was washed away and a 5m deep channel was carved out. A few hundred metres further down, the water flowed round to the right after wiping out a small settlement, creating eddies that gouged out bowl depressions that can still be seen in Lidar today.

There was a medieval profession of pondcaster, whose job was to drain dams to maintain them and clear out silt thought to be harmful to fish health. The aristocracy ate freshwater fish on days when eating meat was not permitted and these large ponds were used to breed fish and eels. It must have have beeen quite a hazardous job

View attachment 478984

No-one has joked about it really where we live -it's a shoot load of water and I'm down stream, but out of the way.

But it's all simple physics though.....

We've all built sand castles and defence walls.... goes quickly under a breach. Simple physics we've all taught our kids when busy building up the dam.

 

[Rezillo]

No-one has joked about it really where we live.

Why would they joke about it? It's the worst UK dam event for many years and incredibly worrying for people. I was horrified when I saw the initial damage. Now the pumping has been so successful (stunning work by all involved), people may be able to relax a bit. As I said, my post was some light relief [from all of that]

 

[fossyant]

Why would they joke about it? It's the worst UK dam event for many years and incredibly worrying for people. I was horrified when I saw the initial damage. Now the pumping has been so successful (stunning work by all involved), people may be able to relax a bit. As I said, my post was some light relief [from all of that]

I think we've all gone, WTF is a reservoir doing that height over Whaley. Never noticed it myself, nor when I was in the closed park a few winters ago..... It's not seen from the roads.... Whaley is in the bottom of a valley - and has a canal... I never noticed the res in my life riding through it....

 

[fossyant]

Nearly 200 years no issues....

 

[Rezillo]

I think we've all gone, WTF is a reservoir doing that height over Whaley. Never noticed it myself, nor when I was in the closed park a few winters ago..... It's not seen from the roads.... Whaley is in the bottom of a valley - and has a canal... I never noticed the res in my life riding through it....

I must admit I was unaware that earth dams of that height and in such a location are still around. Big inquiry coming up, I expect.

 

[Joey Shabadoo]

Village of the dammed.

 

[Joey Shabadoo]

No, what you want to do is push the water up that big hill over there. Job jobbed.

 

[classic33]

I must admit I was unaware that earth dams of that height and in such a location are still around. Big inquiry coming up, I expect.

Scammonden Dam is of a similar construction.

1515,760,136 gallons supporting in part the M62.

 

[Rezillo]

Scammonden Dam is of a similar construction.

1515,760,136 gallons supporting in part the M62.

Just looked that up It's a kind of hybrid - 53,000 tonnes of clay core but supported by an embankment of 3.4 million cubic metres of rock. That shouldn't shift in a hurry, plus it has a bellmouth overflow within the reservoir, not a spillway as such, 10m below the top of the dam embankment.