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Author Curious about an adit
Morlock

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Joined: 31/07/2008

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Curious about an adit
Posted: 05/07/2017 12:35:42
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There is a 'well' at Carsawsan.



(click image to open full size image in new window)
IP: 86.183.226.59 Edited: 08/09/2017 18:31:14 by Morlock
Jack Tempest

Joined: 04/07/2017

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Curious about an adit
Posted: 05/07/2017 19:34:58
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Thank you everyone for your help and time you've invested in my question. I'm impressed with the deductive logic, and thank you for uploading the maps and documents. It's sounding as if it's a relatively insignificant and probably stand alone feature. I hadn't connected the water wheel with it because it is a long way off and the pond isn't completely aligned but theoretically this stream could have supplied it, although it's barely a trickle right now. Exploratory mining has been mentioned and that was the answer the vendor gave when we bought the house. What's most impressive is the length of that tunnel to reach water. Did they know they would intercept it? It seems a random place to site it.

Anyone in the area is welcome to pop around for an inspection and a cuppa. There are a few bumps and lumps in the area which still hold a few secrets.
IP: 86.181.103.149
robnorthwales

Joined: 21/05/2008
Location: Denbighshire, North wales

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Curious about an adit
Posted: 05/07/2017 22:02:34
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The link pic is (allegedly) a well. Whilst it was originally a normal vertical well, at some point in the late 19th Century it was decided to make it into a spring to serve a growing small village. It's (allegedly) something like 300 metres in length.
https://www.aditnow.co.uk/Photo/Cwm-Well-Adit_62926/

Here's the inside of it :
https://www.aditnow.co.uk/Photo/Inside-Adit-For-Well-Spring-At-Cwm-Dyserth_62927/

The amount of work people were prepared to carry out to drain a mine/vein, or to get a supply of water to where it was needed, is continually surprising. The Halkyn deep level drainage tunnel (I posted the pic link of the portal yesterday) was 3 or 4 miles in length.
The Milwr tunnel - again, principally a drainage tunnel - is about 11 miles in length.
I'm currently trying to locate another drainage tunnel in Flintshire, allegedly 1.5 miles in length. The map references are not correct though, and fieldwork hasn't got me anywhere as yet.
IP: 81.174.185.197
Jack Tempest

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Curious about an adit
Posted: 05/07/2017 22:53:52
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robnorthwales wrote:

The link pic is (allegedly) a well. Whilst it was originally a normal vertical well, at some point in the late 19th Century it was decided to make it into a spring to serve a growing small village. It's (allegedly) something like 300 metres in length.
https://www.aditnow.co.uk/Photo/Cwm-Well-Adit_62926/

Here's the inside of it :
https://www.aditnow.co.uk/Photo/Inside-Adit-For-Well-Spring-At-Cwm-Dyserth_62927/

The amount of work people were prepared to carry out to drain a mine/vein, or to get a supply of water to where it was needed, is continually surprising. The Halkyn deep level drainage tunnel (I posted the pic link of the portal yesterday) was 3 or 4 miles in length.
The Milwr tunnel - again, principally a drainage tunnel - is about 11 miles in length.
I'm currently trying to locate another drainage tunnel in Flintshire, allegedly 1.5 miles in length. The map references are not correct though, and fieldwork hasn't got me anywhere as yet.


That's all staggering stats. Our entrance looks exactly the same construction as the Halkyn tunnel though there's not nearly enough spoil around for a very long tunnel. That said the beam of my 4-cell Maglite torch couldn't see the end of it.

I'm so glad I posted my question. It's opened up a whole new, interesting world, although I still have no desire to go subterranean!
IP: 86.181.103.149
robnorthwales

Joined: 21/05/2008
Location: Denbighshire, North wales

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Curious about an adit
Posted: 06/07/2017 09:19:49
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Jack Tempest wrote:


That's all staggering stats. Our entrance looks exactly the same construction as the Halkyn tunnel though there's not nearly enough spoil around for a very long tunnel. That said the beam of my 4-cell Maglite torch couldn't see the end of it.

I'm so glad I posted my question. It's opened up a whole new, interesting world, although I still have no desire to go subterranean!


Spoil doesn't really mean anything. The Halkyn tunnel, for example; in spite of being 3 or 4 miles in length, has no spoil at all in the area. It's in a lovely wooded valley, and you could be 50 yards from it and have no idea it even existed.
It wasn't only a drainage level either. When they dug it, it also intersected a few veins, so they dug those out too !
IP: 92.29.160.218
royfellows

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Joined: 13/06/2007
Location: Great Wyrley near Walsall

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Curious about an adit
Posted: 06/07/2017 09:21:27
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Exception though rather than the rule?

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"How people get on with these things as a mobile device I cannot begin to imagine, but it certainly explains a lot about peoples behaviour."
IP: 88.108.18.26
robnorthwales

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Location: Denbighshire, North wales

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Curious about an adit
Posted: 06/07/2017 10:05:23
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royfellows wrote:

Exception though rather than the rule?


Oh, agreed. I'm just saying not to assume that you need a substantial amount of spoil to indicate how large a tunnel or system is. There must have been huge quantities of material that came out of Halkyn Deep Level (even if it was just 8ft * 5ft * 3 miles, you'd be looking at 40-50,000 tonnes, even in low density rock) and yet there is nothing to indicate where all that material has gone to.
If you've got weak areas of rock, if the passage is bigger, if it is closer to the 4 miles than 3, patches of granite, etc, then you could easily be getting up to 100,000 tonnes of material that came out of there.
And yet, it all looks completely natural - unless you're walking up the stream in the woods, and then you come to a fork. The right branch is natural, the other is walled and dead straight, going 100 yards straight into the portal.
So the absence of a spoil heap doesn't really mean much.
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D.Send

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Curious about an adit
Posted: 06/07/2017 21:56:07
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Hi,
Halkyn adit...3-4 miles long. Milwr...11 miles !
Some Cornish adits are as long as Halkyn, but Milwr?
The Cornish 'County Adit' was supposedly some 30 miles long, but in fact referred to a surface drainage system that collected adit outlets on the way, (some miles long).
The Harz siver mines also drain a huge surface area, but more to feed underground waterwheel pumps than anything else....
All these adit diggers must have had considerable topographical skill for the time!
D.Send.
IP: 83.115.50.155
royfellows

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Location: Great Wyrley near Walsall

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Curious about an adit
Posted: 06/07/2017 22:02:14
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I fell into my own trap years ago.
The spoil from Camdwrbach indicated just a trial, actually much of it was trammed down to Brynyrafr for tipping. Misleading.

The now flooded stope has been plumbed at over 100 feet, something to think about if you stand on the false floor.

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"How people get on with these things as a mobile device I cannot begin to imagine, but it certainly explains a lot about peoples behaviour."
IP: 88.108.18.26
Delabeche

Joined: 24/08/2014

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Curious about an adit
Posted: 07/07/2017 11:12:50
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Sorry not been on here for a while, there are plans of the mines in Mylor and Carclew areas Wheal lemon and an iron mine with associated shafts. lots of shafts and at least one adit course recorded some tin and antimony mining locally too.
IP: 86.130.234.93
Morlock

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Curious about an adit
Posted: 07/07/2017 12:14:51
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Just an additional observation. The image of the portal shows very clear water with no mineral staining in the stream bed. IP: 86.183.150.3
Morlock

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Curious about an adit
Posted: 09/07/2017 15:25:35
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Forget all my drivel and speculative maps as I think I've been looking at the WRONG creek!Blush

IP: 86.183.150.3 Edited: 09/07/2017 15:30:09 by Morlock
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