W. E. Oakeley

William Edward Oakeley, landowner of the Tan-y-Bwlch estate on which the quarries stood, amalgamated the three previously separate Rhiwbryfdir workings into a single business, Oakeley Quarry, in the aftermath of the 1882-83 rockfalls — at the time, the largest underground slate mine in the world.

Mines operated

Record created: 22 August 2026