Hillside quarry.*

Remains of tramway linking with Forn Boeth incline.

Operated during the late 19th century as a slate quarry employing approximately 20 men. Between 1877 and 1883, the operation produced roughly 240 tons of slate annually. The slate extracted from this site was noted for its brittle quality. The workings were later absorbed into the larger Pant Mawr and Fron Boeth system, where its open workings became designated as Floors 19 and 20 of the combined operation.