Author Topic: WARNING - Craig A Ffynnon  (Read 5517 times)

Offline Alkapton

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WARNING - Craig A Ffynnon
« on: June 05, 2013, 10:39:18 am »
A warning has been issued that people should avoid this cave for the time being.

Several rock falls have occurred at or near the entrance.   The entrance is now in a very unstable state.   Until remedial action has been taken you are requested not to visit this cave.
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Online NigR

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Re: WARNING - Craig A Ffynnon
« Reply #1 on: June 05, 2013, 09:02:54 pm »
Alkapton,

Have you seen this firsthand?

Any idea when the collapse(s) occurred?

Offline Alkapton

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Re: WARNING - Craig A Ffynnon
« Reply #2 on: June 05, 2013, 09:23:32 pm »
Cwmbran CC, and I guess all key holders, received a notice from the management committee sometime in the last couple of weeks - no idea when collapse(s) occurred.  Just I think it good idea to let others know.
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Offline Huge

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Re: WARNING - Craig A Ffynnon
« Reply #3 on: June 05, 2013, 10:34:18 pm »
I blame those bloody unicyclists!

Seriously, first Daren and now Craig A Ffynnon. Have there been any earth tremors in the area recently?

Offline bagpuss

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Re: WARNING - Craig A Ffynnon
« Reply #4 on: June 06, 2013, 12:11:26 am »
I blame those bloody unicyclists!

Seriously, first Daren and now Craig A Ffynnon. Have there been any earth tremors in the area recently?

I'm no geologist, but is it not just due to the volume of heavy rain we had over the winter and the length of the big freeze/thaw? Looking at places we have walked in Wales lately, and other cliff/quarry areas there have been a fair few rock falls of late.

Offline Duncan Price

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Re: WARNING - Craig A Ffynnon
« Reply #5 on: June 06, 2013, 09:30:43 am »
Have there been any earth tremors in the area recently?

http://www.earthquakes.bgs.ac.uk/earthquakes/recent_uk_events.html

I blame the gas companies myself.

Offline TheBitterEnd

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Re: WARNING - Craig A Ffynnon
« Reply #6 on: June 06, 2013, 09:46:48 am »
I blame those bloody unicyclists!

Seriously, first Daren and now Craig A Ffynnon. Have there been any earth tremors in the area recently?

I'm no geologist, but is it not just due to the volume of heavy rain we had over the winter and the length of the big freeze/thaw? Looking at places we have walked in Wales lately, and other cliff/quarry areas there have been a fair few rock falls of late.

Nah! it's bound to be those fracking unicyclists
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Offline paul

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Re: WARNING - Craig A Ffynnon
« Reply #7 on: June 06, 2013, 12:07:28 pm »
Global Moderator Comment This is a useful and serious post. Please keep on topic.
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Offline shortscotsman

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Re: WARNING - Craig A Ffynnon
« Reply #8 on: June 07, 2013, 09:29:34 am »
The advice on the MLCMAC website is

There has recently been a rock fall just outside the cave entrance. The cliff face is very unstable and there have been a number of rock falls here in the past. There is now a very large block that appears in danger of falling. Although access to the cave is available as usual, the advice from MLCMAC and NRW is that it would be better to avoid visiting the cave until the situation is resolved.


Offline LizW1985

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Re: WARNING - Craig A Ffynnon
« Reply #9 on: July 16, 2013, 10:03:28 pm »
Anyone know if the situation with the cliff has changed?

Offline Alkapton

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Re: WARNING - Craig A Ffynnon
« Reply #10 on: July 17, 2013, 10:45:57 pm »
I had a look 2 weeks ago.  A lot of small stuff has fallen recently but there is a lot of big stuff that could come down anytime - like everything above the gate wants to be below the gate.

Personally - in this weather I'd be happy going in.  I won't because if it all comes down while I'm in the cave I will inevitably be putting others in danger.

No nothing has changed.  The entrance this side of the gate is highly unstable.  Its hard to see how it could be made safe.
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Offline LizW1985

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Re: WARNING - Craig A Ffynnon
« Reply #11 on: July 17, 2013, 11:54:48 pm »
Maybe I'll give it a miss then.  Thanks for the info.

Offline Alkapton

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Re: WARNING - Craig A Ffynnon
« Reply #12 on: July 18, 2013, 12:42:12 am »
Just out of interest, while I looked at the entrance I picked up an obviously freshly fallen fragment about the size of a fist, very freshly broken, clean sharp faces.   It interested me because on at least one face one could see alternating layers of what seems to me to be a couple of millimeters (at most) limestone then a millimeter thick of mudstone repeating for all of that face.   I do not know how typical that fragment is (probably not very typical) but it suggests there is a very unstable fault above the entrance that is the cause of the problem.

I do not know enough to make any proper comment, but wish I did.
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Offline Alex

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Re: WARNING - Craig A Ffynnon
« Reply #13 on: August 22, 2013, 01:11:49 pm »
Would not the best solution be to dislodge all the loose stuff and then dig it away from the entrance? Or is the idea waiting for the winter faw/freeze cycle to do that for us?
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Offline LizW1985

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Re: WARNING - Craig A Ffynnon
« Reply #14 on: August 22, 2013, 02:45:22 pm »
Went in for a trip the other night,  yea if someone brought down whats left of the over hang above the entrance then I expect it could be cleared.  Did the nw inlet trip to the railway dig there was also a small collapse on the right a little way along the rail tracks, there was a few lose boulders above the collapse hanging by mud didn't look very safe, but im no expert.

Offline hell little caver

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Re: WARNING - Craig A Ffynnon
« Reply #15 on: May 05, 2014, 08:09:27 pm »
Is it open? Hopefully going this week?

Thanks
Hellie

Online NigR

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Re: WARNING - Craig A Ffynnon
« Reply #16 on: May 05, 2014, 09:51:44 pm »
Hellie,

Cave is open, it was never closed.

Notice on MLCMAC website is advisory in nature and still applies.

As with any cave entrance situated in a potentially dangerous position (i.e. partway up a disused quarry face), check for any recent signs of rock movement before you go down.

Could do with some fresh pencils to fill in the logbook when you go. Either take your own or contact Stuart France and he should be able to provide you with some.

Hope this helps.

Offline Alex

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Re: WARNING - Craig A Ffynnon
« Reply #17 on: May 05, 2014, 10:46:42 pm »
So we could have gone down today, oh well.
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Offline Pyro

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Re: WARNING - Craig A Ffynnon
« Reply #18 on: October 23, 2014, 04:54:51 pm »
Has any support work been done on the loose rocks now or is it still a case of being very careful? Planning a trip in about a month if the weather is ok!

Ta

Offline John S

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Re: WARNING - Craig A Ffynnon
« Reply #19 on: October 23, 2014, 05:09:26 pm »
No actual work has been done as it seems that if you start, you may have to take a large part of the hillside down and where would you stop. We have kept an eye on it and the entrance arch, does not seem to have had anymore stuff come down. On the outside, the hill side has shed a few more rocks, so that area needs to be caution.
The lock did get stiff but has now been oiled and is OK.
Still don't hang around outside is the key advise.

The recent wet weather brought a tree down and a bit of a land slip in the Clydach Gorge, but I have not heard anything moving near Ogof Craig Ar Ffynnon.

Offline Pyro

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Re: WARNING - Craig A Ffynnon
« Reply #20 on: October 23, 2014, 06:28:17 pm »
Thanks John!