Hillside working deepened into 3 pits. The site is now heavily overgrown, with much of the mill area and spoil tips having been disturbed by later aggregate extraction activities. The most impressive surviving feature is the long main incline that rises dramatically from the mill bank and climbs into the woodland above. At the foot of this incline, traces of a tunnel leading to what was known as the “Old Quarry” can still be found. A wet hollow midway up the incline marks the location of the former header reservoir that once supplied water to the site’s waterwheel. At the top of the incline, the ruins of the original drum house still survive, though the incline was later shortened and only the lower section remained in operation during the quarry’s final phase. While there is no drum house at the later summit, a buried brake lever suggests that underground sheaves may still survive beneath the surface. The formation of the NWNGR branch line remains visible beside the quarry road, including the site where it crossed at a level crossing. Additional trial workings can be found further up the hill to the south, around grid reference SH 524 565, with possible evidence of other exploratory work in nearby areas.

Hafod y Wern Slate Quarry began as a small hillside quarry but expanded significantly after the railway arrived in the area. Over time, it developed into three distinct pits, each accessed through tunnels carved into the hillside. The slate output was transported down a long incline that descended to processing mills located on the valley floor below. In its final years of operation, the quarry worked only on a very small scale before closing in the mid-1920s. During its active period, a branch of the North Wales Narrow Gauge Railway once served the mill area.

The status of the road passing the site is unclear. Additonally, a high green fence has been built along side the road on both sides as it passes the quarry area making access difficult. There also seems to be an occupied caravan or some sort of household on site.