SH 772 577
This one is near Betws y Coed and is along the riverside footpath that takes you from Betws y Coed, past Swallow falls and up to “The Ugly House”.
It is close to the miners Bridge and there are several areas around there that are fenced off with signs saying “Danger mine etc.” but it is not those.
The huge giveaway is an ochre impregnated stream running across the footpath which immediately takes you to an adit flooded (as usual) to chest depth
It is ungated and accessible but is on Forestry Commission land and their permission would be required.
Over 4000 feet
It is immediately flooded to, around, chest depth. Although logic suggests it should become shallow the further you enter – this is not always the case.
Unknown but probably lead
It is known that this is the drainage adit for the Coed Mawr Pool Mine of which the only known entrance is the engine shaft (which would require an abseil (and locating)).
In fact, the entrance is dammed with natural debris that has fallen from above the adit entrance (dirt etc.) and it is unlikely that the water level will reduce whilst this dam exists.
Potentially exciting as it is entirely unexplored but very deep water for (probably) a sustained distance.
Nothing has been explored
Release the Kraken .....