Some interesting footage of Dorothea deep underwater.
Wales online website (not my video.)
http://www.walesonline.co.uk/news/wales-news/divers-filmed-fascinating-footage-abandoned-10979492 

Nice little video 🙂 and good on him, fair play, being so blind.

As with all mines...shame we cant get rid of the water :thumbdown::thumbdown:

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Have dived there myself many years ago - but only as far as 30m. Had expected to see the Ruston Bucyrus digger on the shelf about 10m down on the north side. Visited that in 1968 when I was taken around the then working quarry by The Gaffer then just 6 years later, sat in the cab working the levers with my SCUBA gear on!

'Think' that tunnel at the end of the clip might be the one through the bottom of the pinnacle - that's if they went that deep (probably getting on for 220m down) otherwise perhaps the one through the buttress on the east side which is about 25m down.

Just wish ordinary 'sport' divers wouldn't keep looking for the top of the pinnacle - it's very small cross section and too easy to miss at about 35-40m down. The 'narcs' (Nitrogen narcosis) starts hitting in anytime after about 25-30m when you're on plain comp air. That coupled with the very cold water beyond the thermocline at about 10m causes total disorientation and has caused most of the deaths in there. :guns::( 😮

To go deep, you need oxy-helium mix or tri-mix gas to breathe - and the training to go with it...

To be safe, they need to go down the old haul road on the north side and just head west to the digger or east to the buttress following the old tram track with NO heroics heading out into the middle!

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This looks like the same guy...

[youtube]mmza8qZwaFo[/youtube]

That coupled with the very cold water beyond the thermocline at about 10m causes total disorientation and has caused most of the deaths in there.

Sudden cold, sudden feeling of descending uncontrolled, disorientation, panic. Next thing you've buggered up your buoyancy and are falling like a rock. And its a long way down. Nasty.

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To go deep, you need oxy-helium mix or tri-mix gas to breathe - and the training to go with it...

... Oh well, I'll put the snorkle back in the attic then 😉

Still it's a nice video of somewhere most of us will never see.

Went down to a hundred feet there years ago. There were huge newts in there. They found a body in there a few months later... Didn't go again.

Don't know if there is any truth in it but someone once told me more people had died diving in Dorothea then died during the working life of the quarry.

There was a rumour going round, though I've not seen anything definitive, that when people had inadvisedly gone to the deeper parts, and managed to surface on getting to difficulty, that they were flown by helicopter under the Menai bridges to get to the decompression chamber at Ellesmere Port.

Yes, that's right, with the bends, the last thing you want is to reduce the external pressure on your body by going up in the air. There are already small bubbles of nitrogen stuck in your joints having come out of solution in your blood, even a few feet higher is enough for them to expand greatly - think Boyle's Law and p1.v1/t1 = p2.v2/t2. Temp won't be changing much so you're left with p1.v1 = p2.v2 so a small change in external pressure will make the bubbles expand greatly. RAF Valley's 'paraffin budgies' flew at almost sea level from N Wales to Ellesmere Port with a bends victim... (Here endeth your physics / diving lecture).

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There was a rumour going round, though I've not seen anything definitive, that when people had inadvisedly gone to the deeper parts, and managed to surface on getting to difficulty, that they were flown by helicopter under the Menai bridges to get to the decompression chamber at Ellesmere Port.

It is true. I was at work one day when they did it - my office window looks out at the bridge - and the reason became clear on listening to the news later.

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I have met this guy on trips there and he is a real inspiration to us all on his positive outlook :thumbsup:

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That's a wonderful story! The guy is impressive... doing things most people with good sight wouldn't dare. I'd love to do a dive there (if ever I manage to get my qualifications), but I think I would give it a miss because of the cold! Clear blue, warm water works perfectly ok for me! 😮

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Also these depths are WAY beyond most divers abilities and training

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