The mine, featuring two levels, includes Skears Low Level, with the grid reference provided, and Firestone Level, which had its portal at NY94242787. In a departure from the norm in the orefield, the Skears Veins were designated alphabetically from A to H. Skears Low Level is distinguished by remarkable calcite flowstone deposits formed within the ore passes.

1821 London Lead Company 1861 Edmund Backhouse & Co. 1907-1912 Teesdale Lead & Zinc Mines Ltd 1940-1945 New London Lead Co. 1948 Coldberry Lead Co. Ltd