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Mine Exploration Forum

Author what's this adit
mountainpenguin

Joined: 18/12/2006

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what's this adit
Posted: 07/01/2019 16:33:31
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was out walking the other day and came across an open adit at SH 55498 53713.
There is a pretty big broken dam near by some bricks.
the gazette says its probably Clogwyn y Garreg mine
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davel

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Joined: 24/07/2007
Location: Gwynedd

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what's this adit
Posted: 07/01/2019 17:38:19
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mountainpenguin wrote:

... the gazette says its probably Clogwyn y Garreg mine

Don't read too much into that name, it's shown on the second edition OS 6" map as "Level".

When Jeremy Wilkinson was searching the maps he named the unnamed and otherwise undocumented levels, shafts, pits etc. after the nearest named feature on the map - which in this case was Clogwyn y Garreg. In the case of levels and shaft he usually called them such-and-such 'mine' - however it's likely that such workings were just trials and were never productive (if they had been they should have appeared in the Home Office Lists of mines).

I'm (very slowly) working through Jeremy's data and changing such names back to how they are tlabeled on the map. However I still have more than 1150 such cases so it's going to take some time to do this. It's now possible to reach Jeremy's data by map reference so, for something marked on the map it's possible to look up if there is any other information associated with it (though, as mentioned above, in most cases there isn't).

In the case of Clogwyn y Garreg 'mine', from the 6" map and aerial photography there seems to be little in the way of tip associated with it, so I would guess it was just a trial for copper. If anyone does have any more information on this (or any other) site I would be very interested to hear it.

The dam itself shows up very nicely at https://zoom.earth/#53.06333,-4.155734,18z,sat, I think it might have been a reservoir for the Drwsycoed mill.

Dave
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mountainpenguin

Joined: 18/12/2006

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what's this adit
Posted: 07/01/2019 23:00:51
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I wasn't expecting much but i wasn't going to look down the adit in running
As you say the spoil is pretty small but there is a very good track all downhill so i did wonder if maybe more of the spoil was lower

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