A quick trip report, seeing as it's Monday morning and I should be doing something productive!
A good day out in Cwmorthin with a group of six, taking a rather 'interesting' route that may have led to some slight confusion as we avoided several of the more frequently trod areas!
We went in through the smoke flue adit (Floor 2 South) and descended to lake level (Floor 1) then down to Floor A atop a rubble-filled chamber which contained a fair sample of ash and coal waste, presumably dumped from the boiler which originally powered the Old Vein incline.
The descent down to Floor B was via a set of steps in Chamber 1 West, then downwards to Floor D and the once 'floating' bridges of the Old Vein. The ascent was via one of the huge chambers, filled with rubble and collapsed roof; only to descend again to get access to the top of the 'boiler chamber' with its recently repaired ladder.
From there, a brief interlude down the Chamber 34 incline followed with a look at a Caban and the 'Z' chambers which were dug underneath the Back Vein workings.
From there, we followed 'Lefel Ffrench' which was built to drain the Back Vein workings, although as we soon found, there's still a couple of feet of water at the foot of the incline!
From there, it was up the Back Vein incline before diverting off and up the newly-installed slate steps in Chamber 1 West before heading out through the Floor 1 Adit (lake level) and past the impressive gate installed by Friends of Cwmorthin.
All in all, a pretty good introduction to the workings of Cwmorthin, all the more impressive for the fact that virtually all we saw was dug out of the mountain in a 40 year flurry of activity at the end of the nineteenth century.
Hello again darkness, my old friend...