A copper mine, first mentioned around 1800, by the lake of Llyn Llydaw on the slopes of Mt Snowdon. The mine was worked intermittantly if rather unsuccessfully for over 100 years by a number of companies including the Snowdon and Dalawin Copper Mines (1847); Cwm Dyle Rock and Green Lake Copper Mining Company (1851); Cwmdyle Copper Mining Ltd (1857); Gt Snowden Copper Mining Company (1873); North Wales United Mines (1890); by perhaps the best known company, the Britannia Copper Mine Ltd (1898); and finally by the Penypass Copper Company (1915). The mine closed in 1916.
Some of the 8 levels remain, together with the remains of the Britannia mill and other buidings around the lake shore.
Ref.:
The Old Copper Mines of Snowdonia, David Bick, 3rd Edition 2003.
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UK OS Grid Reference: SH616547
Map Reference: 53°4'16"N , 4°3'57"W
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