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Mud Sump

JohnMCooper

Active member
My latest visit report:

Sunday 24th March 2024. Monica Bollani, John Cooper, Steven Lloyd, Matthew Ryan-East, Matt Voysey and Barry Weaver. Water levels down to normal winter levels. Went to look at the Mud Sump. Totally full, as was the Moles’ Dig. Decided not worth visiting for a few more weeks. No one else seen in cave. 2 hours.
 

Daniel Rose

New member
My latest visit report:

Sunday 24th March 2024. Monica Bollani, John Cooper, Steven Lloyd, Matthew Ryan-East, Matt Voysey and Barry Weaver. Water levels down to normal winter levels. Went to look at the Mud Sump. Totally full, as was the Moles’ Dig. Decided not worth visiting for a few more weeks. No one else seen in cave. 2 hours.
Thanks very much
 

mrodoc

Well-known member
Well the fourth generation has now been caving in my family. I got my father into it back in the mid 60's then persuaded my wife to try it then both my daughetrs (one has been to Meghalaya a couple of times) and now all my grandchildren have been underground (and Scarlett has been in Descent). Almost the same with scuba diving as my father got me into it about 60 years ago and the whole family dives apart from one partner and the grandchildren. I'm very proud of them all! Who else is out there?
 

Ian Ball

Well-known member
Is Mud sump the baleable from I e side only in Swindon's?

How do you know if it is possible? Is it a visible air gap or dont attempt?
 

mikem

Well-known member
Usually bailed to a more than obvious gap, although I don't know what anyone else's minimum is
 

PeteHall

Moderator
Is Mud sump the baleable from I e side only in Swindon's?

How do you know if it is possible? Is it a visible air gap or dont attempt?

It needs to be bailed from the 'near' side. There's a series of reservoirs and pipes to bail it back up the passage to a place where it can (usually?) get away. It's a job for a group, not one to do on your own. For as long as I've been active in Mendip, we owe a debt to @JohnMCooper for regularly keeping on top of it.

If you know what to expect, and therefore how deep it is, you can sometimes freedive it, but it's quite a snug passage and there's no freedive line in it. I've only done it once and it wasn't very pleasant!
 

darren

Member
To get to the other side you would have to do a reverse Short Round Trip minimum. This would involve bailing, or free diving , "The Troubles". These are 2 or 3 ducks that are ear deep (depending on how much bailing you do). They are set up to be bailed and siphoned from Mud Sump side. I don't remember any bailing equipment being the other "wrong" side of the ducks

When you eventually got to mud sump it would be a long way to carry the water if you tried to bail it. I also don't remember any bailing equipment on the other side of the sump. Free diving the 50cm long sump would theoretically be possible but there is a steep short downhill ramp into the sump. Feet first on your back maybe?

Coming at the sump from the correct side there is a small triangle at the top that becomes visible whilst bailing, just big enough for your nose. Before John came on the scene it was traditional to bail down to this level and carefully navigate through the sump NOT making any waves. Subsequent trips would then bail the sump lower on each visit, eventually arriving at the dry sump we now get
 

Ad W

New member
As Pete says, it is a job for a group to bail as although the low point is narrow, water backs up into quite a wide passage so it takes quite a bit of work to lower the levels initially.

As its now not muddy, I did wonder if it would be worth building a man powered pump to increase efficiency, but that is as far as I have got with actioning anything...
 

JohnMCooper

Active member
As Pete says, it is a job for a group to bail as although the low point is narrow, water backs up into quite a wide passage so it takes quite a bit of work to lower the levels initially.

As its now not muddy, I did wonder if it would be worth building a man powered pump to increase efficiency, but that is as far as I have got with actioning anything...
I believe the CSCC C&A Officer is investigating the use of a man powered pump for this very purpose.
 

alanw

Well-known member
I believe the CSCC C&A Officer is investigating the use of a man powered pump for this very purpose.
The Earby sump pump as used in Ireby Fell might be of interest


(Does anyone know why the domain is no longer registered?)



The Wessex seem to have built one, too
 

PeteHall

Moderator
The Wessex seem to have built one, too
Yes and it's still in regular use in Charterhouse to start the syphon at Portal Pool.

It got a new valve last year, as the original had broken, and it's got through a few drain rods, but it's otherwise done pretty well.
 
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