Author Topic: Deepest caves in the Peak  (Read 10295 times)

Offline Rob

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Re: Deepest caves in the Peak
« Reply #50 on: September 15, 2020, 04:15:37 pm »
Either that or you've worn the top down by too many visits (or just a more accurate survey)...
Yes, that 80m is using my 2015 survex data. I'd love to add more Badger exploration/discoveries to the survex file........  :spank:
The end is where we start....

Offline alastairgott

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Re: Deepest caves in the Peak
« Reply #51 on: September 15, 2020, 07:55:49 pm »
Longcliffe Mine (and Pot) is given as 84m on the DCA registry. https://registry.thedca.org.uk/sitedetails.php?id=23
« Last Edit: September 15, 2020, 08:04:17 pm by alastairgott »

Offline pwhole

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Re: Deepest caves in the Peak
« Reply #52 on: September 15, 2020, 10:46:29 pm »
Haha - shooting straight into the top ten, with their new hit single - a revamp of an old classic: 'Under the Boardwalk'   ;D

Online Katie

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Re: Deepest caves in the Peak
« Reply #53 on: September 15, 2020, 11:02:08 pm »
What is the criteria for being on the list?
Robins shaft is pretty much all mine, with limited natural - surely there are lots of other deep mine shafts in Derbyshire that hit some natural?


Offline pwhole

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Re: Deepest caves in the Peak
« Reply #54 on: September 15, 2020, 11:09:34 pm »
I guess Long Rake Mine should be on there then - and there's several more where that one came from. I guess it's more of an interpretation of how you get to the natural, and whether you could without the mine shaft. Though that would exclude Rowter Hole and JH immediately! I can't remember, but is that what the asterisks signify? That's they're accessed by an artificial shaft?

Online mikem

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Re: Deepest caves in the Peak
« Reply #55 on: September 15, 2020, 11:13:38 pm »
Criteria are on the original post - it includes those he thinks should be, but excludes those he thinks shouldn't! (Do longcliffe / long rake include natural passage?)

* Assisted by mines
« Last Edit: September 15, 2020, 11:30:13 pm by mikem »

Offline 2xw

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Re: Deepest caves in the Peak
« Reply #56 on: September 15, 2020, 11:21:44 pm »
Aye if we're including mine then Ladywash pops into the number 2 spot from entrance to sough

Offline pwhole

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Re: Deepest caves in the Peak
« Reply #57 on: September 16, 2020, 07:49:56 pm »
Criteria are on the original post - it includes those he thinks should be, but excludes those he thinks shouldn't! (Do longcliffe / long rake include natural passage?)

* Assisted by mines

90% of Longcliffe is natural passage. We're still trying to work out where most of the galena was ;)

I've never been down Long Rake as it was 'closed' due to a carbon monoxide scare the week before my first trip. It's never been resolved and it's never been re-tested as far as I know, and as a committee member of DCA, that bothers me - not least from a safety perspective, as CO in a mine is very, very odd (though I have subsequently been on a test where we found lethal levels in a shaft near Elton, but the circumstances were extremely fuzzy to say the least - but the meter was calibrated). But mainly as Long Rake's meant to be one of the best trips in Derbyshire, and does have plenty of natural, I'm assured - and a swallow at the bottom that goes to I know not where, but I have an idea. The landowner is iffy about the liability issues, despite reassurances that there are none, but I think we should politely but firmly request another test - it's been over ten years. We don't have to go down immediately and could easily do a controlled test down the shaft first. But I'm straying off-topic ;)
« Last Edit: September 16, 2020, 08:02:06 pm by pwhole »

Offline AR

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Re: Deepest caves in the Peak
« Reply #58 on: September 16, 2020, 09:13:35 pm »

90% of Longcliffe is natural passage. We're still trying to work out where most of the galena was ;)


Probably in the sediment fill, just waiting for the miners to dig through and buddle out! :thumbsup:
Dirty old mines need love too....

Offline Rob

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Re: Deepest caves in the Peak
« Reply #59 on: September 17, 2020, 11:18:55 am »
So i think the "deepest caves" could be judged in two ways:
  • the maximum vertical extend of continuous natural formation
  • the maximum depth accessible below the entrance/highest point

My current list uses option (2), admittedly missing a lot of deep mines that intersect some cave.  After some further consideration i think option (1) is more appropriate.

This is trickier however because, where caves also have a significant portion of mine connecting, a keen understanding of the natural development is required. For example, the highest natural in the known Peak Speedwell system is the top of Horne's Gulley in Titan. This connects to Main Rising (the deepest point) through entirely natural development. It is 29m below the entrance of JH, so therefore reduces the judged depth to 239m.

Before i start to update the list I'd be interested in other people's thoughts regarding this approach.
The end is where we start....

Offline alastairgott

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Re: Deepest caves in the Peak
« Reply #60 on: September 17, 2020, 12:33:45 pm »
Keep option 2, but the title I left on that survey I sent you still stands  :alien:

Offline pwhole

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Re: Deepest caves in the Peak
« Reply #61 on: September 17, 2020, 01:33:21 pm »
I'd still stand by Longcliffe with option 2, minus 5.4m for the plastic entrance pipe!

But admittedly it is much trickier with some - we'd have to set specific points where the natural was judged to have 'begun', and especially where miners have modified the place, that could be almost impossible in many cases. JH would presumably then only qualify from the top of Leviathan to the bottom as all the passage up to that point is artificial - though I suspect Bitch Pitch may be an enlarged natural rift, it's impossible to know for sure now. Portions of our recent westward extensions from the entrance shaft base were almost certainly natural, and were only 6m below the surface - far higher than Leviathan, though not, admittedly continuous with Leviathan  - perhaps 'contiguous' would be a preferable term?

 

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