Bryneglwys
I was at the waterfall pit (Floor 25, Ch 9B?) on Tuesday and didn't spot any changes there.
Today (Sun 4 th Oct) I went for a look underground. I did the Floor 10C to Daylight Adit through trip and honestly didn't see any new falls. The last time I did this route was almost exactly a year ago and the first time that I went this way was in 2003. There has always been a fall across the haulage ledge on Floor 10C, two chambers in (where there are big, old bolts, which I think JSMTC Tywyn installed for an abseil.) It didn't seem any different and the rocks looked dirty and not clean, like a fresh fall. I'm sorry: I now realise that I should have taken some photos for people to see.
The handline down Chamber 12C is still there, as is the rigging for the 50m pull-through abseil. My main point of concern was between Floor 15C and Floor 20 in chambers 10C & 11C. There are big roof-fall blocks, with a lot of pyrite in them, that you scramble over. I've seen new falls in this area, over the decades but nothing seems to have changed here recently. A block might have recently come down and hit the catwalk chain that goes out left rom where the fixed rope starts.
Floor 20 was waist-deep in water behind the pebble damn. The water here always seems colder any other mine or river I've been in! The crawl under the collapsed rails was another area of concern but this looks unchanged too. The waterfall down the Main Shaft was thundering and the Daylight Adit was about its usual water level. There still ripe blackberries outside.
I also walked along Floor 15B, which I've visited fewer times. I couldn't see any fresh falls in the tunnel or in the parts of the chambers that I could get into. I'd left my bolt hangers at home and so I didn't go down the pitch to Floor 25 (Two 10mm plates required: nuts & washers in-situ).