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Kiln Piece Hole - A new entrance to the Slaughter Stream Cave system?

Today, Saturday 19th July 2025, six of us made the first through trip through Slaughter Stream Cave, entering via Kiln Piece Hole and exiting the cave from Wet Sink.

Proper report to follow, but suffice to say, it was a seriously tough and committing trip that pushed me to my limits both physically and psychologically at one time or another. Not one I'll be repeating in a hurry!
 
Once you connect Redhouse Lane to Slaughter Stream, Kiln Piece to Redhouse will be quite an outing!
Before yesterday's trip, I was saying that we'd have to do it at least three times.
Once to Wet Sink, again when we can go all the way to Redhouse and a third time when we can go all the way to Yat Grotto (or wherever we pop out).

After yesterday's trip, I'm inclined to say that someone else can do the second and third through trips!
 
Before yesterday's trip, I was saying that we'd have to do it at least three times.
Once to Wet Sink, again when we can go all the way to Redhouse and a third time when we can go all the way to Yat Grotto (or wherever we pop out).

After yesterday's trip, I'm inclined to say that someone else can do the second and third through trips!
Yes, I certainly have no plans to go back ever again! A very tough mental and physical trip, and you need a lot of things in your favour with weather and logistics working. Trouble is, I said I'd help with the survey! (Thankfully that can be done from KPH end, but still very wet and tight - not good surveying conditions..)
 
Another thing to report from yesterday was a high level of CO2 build up.
Crawls that Dan and I had been through and back a week ago just after Sump 2 were a real struggle with everybody panting.
Very worrying when you have only just started.
This will be a big factor when we survey. We'll also need extra thick wetsuits and an able team looking after the dam and sumps.
There is no way I'm doing the through trip again. As the oldest member of the team, I think there needs to be an age limit....
As I mentioned before we will write up for Descent and provide a full route description (not that you can get lost, but to confirm that the impossible passage in front of you is the way on)!
At present the trip requires serious planning with a support team and will only ever be possible in very low water conditions.
 
Before yesterday's trip, I was saying that we'd have to do it at least three times.
Once to Wet Sink, again when we can go all the way to Redhouse and a third time when we can go all the way to Yat Grotto (or wherever we pop out).

After yesterday's trip, I'm inclined to say that someone else can do the second and third through trips!
I think I'll be leaving the hypothetical trips for the next generation. That one was plenty, thanks 🙂
 
Kiln Piece Hole to Wet Sink through trip! 19/7/25.

Through trippers: Tim Nichols, Pete Hall, Ian Healey, Rhys Williams, Joel Foyster, Dan Sandford.

Underground support: Falkland Anderson, James Higgins

Overground support: Paul Taylor, Jon Forster, Danny Copeland.

For 31 years, there has been a dream of a through trip from Kiln Piece Hole to Wet Sink in Slaughter Stream Cave. On Saturday, a large team worked together to achieve that dream!

After various discussions throughout the week, it was decided that a one way trip was on from KPH to WS. (A proposal for an exchange trip was discussed and dropped on practical and safety grounds).

Pete and myself went down KPH first, just before 10am, followed by Rhys, with the job to pump the dams and clear the way for the rest. Pete saw the 2nd duck was lower than when he first pushed through, so decided to go for it, with his neoprene hood on. He planned to push forward, to enlarge the slot in One Nostril chamber, and then start digging the squeezes bigger. I looked at it and decided that it was far too high for us all to go through and would need pumping. The only way we could do this was to get everyone to Blind Optimism chamber, then pump the water back to fill sump 1, in effect trapping us in. We eventually got everyone through and started pumping back. James manned the dam, and agreed to hang around for a while, after we had all pushed through, just in case we had to return to the KPH entrance. Thanks James – You were an important safety ‘cog in the system’.

We all slithered through the wet, cold, muddy ducks and crawls, and popped out into the Coal Bunker chamber. The next crawls were a real struggle - everyone was really blowing hard. We had hit a section of bad air in the low passages. We got to a small higher aven and regrouped. We were all quite worried and we hadn’t yet found Pete! No other choice but to push on, the air gradually got better as the passages got a little bigger.

We eventually found Pete, thankfully still conscious, in the tight squeezes that had been recently surveyed. He had been enlarging he as went with a spade. He was very glad to see us, as by now it was at least 2 hours since he had left us. We speculated that his efforts may have used up some oxygen and digging up the mud and gravel may have release some CO2. With the extra 5 of us coming through, O2 levels had been used up quickly!

Rhys and myself took to the front, with crowbars, and enlarged the tight passages as went (I’m not sure Pete was convinced we had widened them!) Joel and Tim wanted to survey a side passage, as rightly, it was assumed that it may be a while before anybody gets back there, whilst Ian got all the drama on video.

Finally, the passages started to get bigger heading down Pirate Passage - hands and knees crawling was quite a relief. Ploughing onwards, it seemed to take ages to get to Star Shaft.

We came out in drabs and drabs, all thoroughly knackered and vowing never to do the trip again - all out by about 6pm. It was great to be greeted by Falky and Paul at the entrance and there was a good bottle of Champagne waiting for us to toast our achievements! (I’m not sure I savoured the fizz much – it was gulped down!)

Massive kudos to Paul and Dave Appleling, who managed most of the trip 30 odd years ago -They were so close to KPH!

A great, hard day for Forest caving and a magnificent team effort. Well done to all involved.

More pics and video will be out soon + write up in Descent, and of course full report at Hidden Earth!
 
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We speculated that his efforts may have used up some oxygen and digging up the mud and gravel may have release some CO2.
For the record, I had done no digging in the areas with highest CO2, so any CO2 that had been released from the mud (if it was), was simply from people crawling through, combined with six people working hard in a confined space at a natural low point. Something to get very wary of for future trips!

Also of note, was that all evidence of Dan and Tim passing through the week before had been erased through these low muddy sections; I might as well have been in virgin cave. Clearly the whole passage had flooded during the week and it hadn't even rained that much!

Fortunately, the water seems to disappear into the gravel and once past the initial section there was no evidence of recent flooding.

For the above reasons, combined with the logistics of managing the dam, it would seem unwise to attempt the through trip in the opposite direction. Any issues would mean having to reverse the whole trip, just as Paul and Dave did 30 years ago, which would be no small undertaking!
 
What an achievement. Unlike Redhouse Lane, I don't think I'll be gagging to join you on a trip down this one, chaps. But thanks again for keeping forum readers up to date with your exploits!
 
When you break the sumps does that generate any instant airflow? Or are you only breaking them one at a time? I would have thought a big system like that would have a good draught. Well done BTW
 
When you break the sumps does that generate any instant airflow?
In a word, no. I've never noticed a sudden change in draught, however there is a noticable draught in some places.

My speculation is that there are open rifts linking the various avens we pass under which allow air pressure to equalise through the cave, while leaving some of the low sections to stagnate.
 
When you break the sumps does that generate any instant airflow? Or are you only breaking them one at a time? I would have thought a big system like that would have a good draught. Well done BTW
We were surprised about the bad air. The sumps were open, with an inch or two of airspace throughout the week, so there was a draught. We could feel it quite strongly, when coming through the ducks. Presumably the main airflow went over the lower crawls (they were rifty passages, with tight space above the crawls) and the CO2 sunk to the floor.
 
Well done all! Don't think that trip is going to be repeated often or possibly at all!!

In case you missed my post, here is the song (AI) I created specifically for our trip in Slaughter yesterday. I played it to Falkland and Alex at the Wet Sink entrance, before they did the round trip..

Bring your Daughter to the Slaughter ... Stream Cave (also known as Wet Sink)
That's great. However, you need to change the chorus now....
Slaughter Stream Cave is the system. Wet Sink is the name of one entrance (Kiln Piece Hole being the other).
Of course as and when they connect SSC becomes an inlet to Redhouse and we'll rename the lot Symonds Yat Master System LOL
 
Of course as and when they connect SSC becomes an inlet to Redhouse and we'll rename the lot Symonds Yat Master System LOL
I thought it was already "Slaughter Stream Cave" (capturing the then-hypothetical multi-entrance cave system), accessed initially via the Wet Sink entrance.

We can now access SSC via Kiln Piece Hole entrance, and before long we'll be able to traverse the system from Redhouse Lane Swallet entrance too!
 
I thought it was already "Slaughter Stream Cave" (capturing the then-hypothetical multi-entrance cave system), accessed initially via the Wet Sink entrance.

We can now access SSC via Kiln Piece Hole entrance, and before long we'll be able to traverse the system from Redhouse Lane Swallet entrance too!
It probably wasn't worded properly. Apologies.
The system is Slaughter Stream Cave.
It now has two entrances - Wet Sink and Kiln Piece Hole.
Other feeders that are small caves/digs or simply swallets that are not a passable way in include - Dry Sink, Kiln Hole, Hole in the Hedge, Tip Sink, Gwyn Sink and Whirley Hole (Barn Sink).
Redhouse Lane is downstream and has much larger cave passage. We already know one part of SSC is an inlet into Redhouse.
A large section of cave in between both systems towards the common resurgence (The Slaughter), is currently unknown.
Major cave almost certainly exists at the western limits of Redhouse and the northern limit of SSC.
 
A brilliant video, Ian.

The thought of going back through the sumps to the end of Pirate and back again to finish the survey is terrifying. I just hope the air has improved.

Needs to be done though....
 
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