|Date||18 June 2011|
|Location||Tan-y-garth, Bethesda||SH 64007 66897; 53.18172°N, 4.03647°W|
The remains of these workings, which date back to the late 18th century, can be seen in a line following the 320 m contour around the lower slopes of Y Garth at the foot of the Carneddau mountains. This line stretches for some 160 metres and runs NNE from SH 63932 66751 to SH 64007 66897. There are several entrances, all of which are flooded.
David Bick (2003) provides the following information about this site:
David Bick, The Old Copper Mines of Snowdonia, 3rd Edition, 2003, Landmark Publishing (ISBN 1843060752), p. 118.