Ogof Draenen – Sunday 20th March 2022

David MacDonald, Gareth Farr, Louise Lucas

By David MacDonald

We met up on the not so bleak Pwll-du, the sun was beaming and the parking area was packed! Lou struggled to find us, but she got there in the end.

Gareth, Lou and myself kitted up and walked to the entrance. The entrance series was great and surprisingly easy to navigate, and before we knew it we were at the climb. None of us had a problem with it, well once Gareth and I transformed into human steps Lou didn’t have a problem. We signed the logbook at Cairn Junction and headed right towards Wonderbra. Once through Wonderbra we got to the “mud bank” and thought the left here was the left onto White Arch Passage, and carried on down the streamway.

Once we realised our mistake we turned around and headed back towards Tea Junction. We made good time through White Arch Passage, after a quick snack break at Tea Junction, and found our way into Lamb and Fox Chamber easily. We refilled our drinks at the cascade and then had another snack break at the cairn to Indiana Highway. Lou was feeling quite tired after the detour down and back up the streamway. Once we were ready to go again we were quite cold and tense. I don’t think this helped our nerves for the traverse. We climbed up the cairn and turned the corner into Indiana Highway, the mud bank was a challenge in itself! Once in the beginning of the passage we were all struck with its beauty, not that it’s decorated with formations, just the beautiful organic flow of the phreatic passage is enough! We quickly passed the side passages and round the tight corners to the start of the traverse.

I was first and headed into it around the first awkward corner to where it straightens out. I heard Gareth call and he was saying Lou was unsure about carrying on. We had a quick chat and decided amongst us we should just head back. On the way back we had a quick look at the side passages close to the start of Indiana Highway, we saw the fossil in the roof of the one chamber and couldn’t work out if we saw a shark tooth in the roof where you climb in/out of the side passage. On the way out we had no problems whatsoever and had a look in some side passages. We signed out on the logbook and headed back to the climb. We all had no problems climbing and route finding, and quickly found ourselves being soaked again on the final stretch. We got out and it was still a really nice day, so changing wasn’t too bad. We warmed up with a cuppa and headed on our way.

Upper Dinas Silica Mine – 3rd January 2022

Barry Burn
Andrew ‘Zeb’ Zerbino
Xavier Zerbino

This was to be my first trip underground in a very long time. This time last year, we had missed a lot of caving due to COVID restrictions and I was looking forward to the prospect of caving again in the New Year. I was unaware that in just three days time, I would be looking at a positive test result followed by several weeks in intensive care and a further few weeks on a renal ward before finally coming home in the latter part of March. It’s been a long haul since then and had taken me a long time to recover enough fitness to even think about getting underground again. I was now thinking that a nice easy trip would be achievable and Upper Dinas Silica mine with its large galleries and no crawling with minimal scrambling would fit the bill. Previously, access to the mine has been via either the very steep path up the rock from the car park or by following the river upstream and climbing up the waterfalls. Now though, an old right of way has been re-opened due to the efforts of Roy Fellowes, the owner of the mine and I thought this would be an easy way up.

The Monday was a bank holiday and Zeb and Xavier had said they fancied a trip and I picked them up at a nice reasonable time of about lunchtime and we managed to make reasonable time through the roadworks to the car park at Dinas Rock.

Dinas Rock is an imposing place and legend tells that this is the resting place of King Arthur and his Knights. It is also said that there are many fairies here and in British Goblins, Wirt Sykes wrote of the place’s bad reputation. More recently, the area has seen extensive mining for silica that was used for the production of fire bricks that were used extensively in the steel making industry throughout the world. Now, mining has ceased and the area is more likely to be infested with cavers, climbers and walkers.

There are a number of caves and mines here and we were to visit the largest, Upper Dinas Silica mine. The re-opened way to the mine is to come out of the car park and follow the road over the bridge and up a hill past some glamping pods on the right until a clear path is found leading off to the left. The path is well kept although muddy in places and takes you to the top of the gorge where some old structures that used to support the pylons for the aerial ropeway are to be found. The path takes you down a steep slope that ends at the bridge on the other side of the river from Upper Dinas by the entrance to the smaller mine opposite, Middle Dinas Silica Mine.

Base of Aerial Ropeway Pylon

Middle Dinas consists of three levels, the lower of which floods, the level of which depends on the river level outside. On previous visits, there has been a large, deep pool in the main passage but this time it was more or less dry and we were able to have a good look around. Zeb climbed an ascending passage that goes up to another passage and a higher entrance. After a look around, we crossed exited and crossed the bridge to enter Upper Dinas itself.

Looking out from Middle Dinas Silica Mine
Climbing Ascending Passage
Way Down to Lower Level

Upper Dinas is a massive, impressive place with the upper, unflooded section being effectively a massive chamber on a steep incline, interspersed with many pillars that support the roof.

Looking Back Towards Entrance

We did the usual thing which is to follow the big level just up from the flooded levels until near the end then drop down and continue to reach the furthest point east in the mine to find there had been some other idiots there before us.

Graffiti at Far End Of Mine

Retracing our steps, we climbed up to the remains of the winch which has a large ventilation shaft that slopes upwards to the side of the winch. Zeb went off to explore whilst Xavier and I were more sensible and hung around below taking photos until Zeb returned with a tuft of grass to prove he’d found the the exit to the surface above.

Xavier Posing with Winch
Ventilation Shaft

Heading back towards the entrance, we gradually climbed upwards as we went by climbing up a level, following on for a way and then climbing back up again. This way we made it to the top entrances and emerged into the open. A short scramble then to the path that took us back down to the car park.
It was great to get out and get underground again. It showed me that I still have a way to go as I found some of the scrambling and hills difficult. With time and effort though, I am confident that I will be able to get some way back to where I was before COVID. However, for my first trip back, I was thoroughly knackered but very chuffed to be back.


Surveys of the mines can be found in Caves and Mines of The Sychryd Gorge.

Information on access to this mine and others can be found at the website of Cambrian Mines

The Cambrian Mines site contains a lot of interesting information such as the History of Mining and links to a collection of historical photos from when it was a working mine.