Penarth

Alternative name

Hafod y Llyn

Location

Parish

Owners

1918		Morris & Williams agent O Morris
1919–1922		Cambrian Manganese Co. agent Thomas O Williams

Worked

after 1916, working in 1923

Production and Employment

	(tons)	Manpower underground surface
1918		2	3
1920		6	7
1921			20

Transport

By road to Llanbedr?

Remains

Mostly overgrown with trees. There appears to have been a significant build-up in ground level which has almost closed-off some of the entrances. The down-dip entrances in the outcrop have rubbish and standing water in them and some entrances look unsafe. Low adit leading to stoped area. Possible building foundation or ore dressing platform. Two pieces of bridge rail have been driven vertically into the ground in line with one of the entrances (possibly an anchor for a windlass). (August 2002)

Ore bed described as being .3–.36 m thick and having a dip of 15–20°. Workings were inclines driven down-dip from which stoping was carried out. The mine was just above lake level and “heavy” pumping was required. The mine was described as “active” in 1923. [Dewey & Dines 1923: 65]

At the south-west end of the outcrop is an adit along the strike with working up and down dip.

The track from near the adit mouth to the base of the outcrop is built up on a substantial dry-stone causeway.

		Hafod-y-llyn Looking north-west from SH60052920. The mine workings are in the trees at the left of the picture.
		Workings One of the down-dip entrances on the outcrop. As can be seen from this picture, much of the site has been overgrown by trees.
		Workings Walled-up rock from workings.
		Workings Another view of the overgrown workings. One of the entrances to the underground workings is concealed in the dark area in the centre of the picture.
		Adit Entrance The apparent low height of the adit in this picture is due to the build-up of ground level outside the entrance.
		Adit Note pack wall on left and part walled-up down-dip stope on right.