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Hallowe'en Rift, Mendip Hills

Excursions [and other notes] involved in the exploration of Hallowe'en Rift; a cave, so far, formed within Triassic Dolomitic Conglomerate.

The exploration of Hallowe'en Rift was started in 1982 by Trevor Hughes with other members of the Bristol Exploration Club, then during the early 1990's Vince Simmonds and other, mostly, local diggers were active at a number of locations within the cave, including the start of the dig to the 'east' side of the entrance, leading to An Unexpected Development in August 2018, with Graham Johnson in December 1991. The current phase of exploration was commenced in 2009, with the majority of the early work being carried out by Vince Simmonds and Alex Gee, now the regular team also includes Rob 'Tav' Taviner, Graham 'Jake' Johnson, Nick Hawkes, Jonathon Riley, Paul 'Brockers' Brock, Roz Simmonds, Duncan Price, Mike Moxon and Matt Tuck. There has been occasional help from others including Mike Willett, John 'Tangent' Williams, Pete Bolt, Bob Smith, Callum and Hazel Simmonds, and several appearances by that well-known antipodean, Ray Deasy.

There have been visits from some notable experts in their various fields including: Charlie Self, Andy Farrant, Christopher Smith, Derek Ford, Joyce Lundberg, Don MacFarlane, Marc Luetscher and Gina Moseley. All have added to a better understanding of Hallowe'en Rift.

6th July 2019

digging 2019 Posted on Sat, July 06, 2019 16:22:00

With Jon, Nick and Tav.

The Cold Gnarly North was my destination today, the others decided to dig in the Soft South, which is the easier, more comfortable option.

Drag line attached, bags attached, drill tube and wire reel in hand I set off along the passage north. I was a bit surprised to find that there were two puddles of standing water, 50mm – 75mm depth, in the ‘lake’ but it wasn’t an issue. My plan was to widen the next constriction just beyond the small
rift to improve access and make digging and spoil removal easier. Drilled 4no. holes, 550mm, length x 12mm, diameter and charged. I looked around for “Trevor’s ball of tamp” that I had put to one side for safe keeping, but it had gone, added to the spoil heap I assume. Unfortunately, this is probably the only part of the cave where there is not any mud suitable for tamp. I had to make do with arisings and the little bit of mud that I could scrape up.

All done, I made my way south, dragging/shoving by bags and kit along the passage while reeling out the wire. At the junction, the ‘Soft Southerners’ were about finished digging, just the hauling out and emptying of bags to be
done, so I gave them a helping hand. About 70 bags were hauled to the surface and emptied. When the bags were all empty, I returned underground to bring my morning’s task to a satisfactory conclusion.

Then down the hill to the farm in the warm sunshine, changed and up the hill to the Hunter’s for refreshments.

29th June 2019

digging 2019 Posted on Sat, July 06, 2019 16:21:25

I was at a BCRA Field Meeting – Hypogenic Caves of the North Pennines, UNESCO Global Geopark at Nenthead. The rest of the team had other commitments, no digging took place.