They were both operated by the same company throughout their history, and were both connected by the Deeside Tramway to the Llangollen and Corwen Railway.

Edward Rowlands was riding on a loaded slate wagon that was sent down from the Deeside quarry to the head of the incline down to Glyndyfrdwy.

[6] In 1915, two men, Robert Jones and John Lloyd, were crushed by an unexpected rockfall, weighing 100 tons, in the quarry.

The tramway originally ran between the slate works and Deeside quarry, before being extended in the late 1870s down to the wharf.

Several beds of Ordovician shales and mudstones run across Mid Wales, from Tywyn in the south-west to Chirk in the north-east.