Ty'n-y-Bryn quarry

The original workings at Ty'n-y-bryn were started in the 1840s. In 1861, the quarry was restarted and a large mill was built just behind the Pentre-bont houses on the edge of Dolwyddelan. The mill had a large waterwheel which was fed from the Llyn Cwm-penamnen reservoir about 1 mi to the south. In 1875, the Penllyn quarry was taken over by the company. Penllyn had been worked on a small scale since at least 1873, and was immediately to the east of Ty'n-y-bryn. The Ty'n-y-bryn mill processed slate from both quarries. In 1879, an incline was built down from the mill level to exchange sidings at Dolwyddelan railway station. Unusually, the incline was laid as standard gauge, allowing wagons…