Cwm Mawr No. 1

Alternative names

Nant Steicyn
Cwm Mawr & Nant Steicyn
Cambrian ? [GAT SMR: 21749]

Location

Parish

Geology

The outcrop runs from near Llyn Cwm Bychan for almost 2.4km. The bed dips to the west and is at times much crumpled. At the northern extremity of the outcrop (1.2km north of the farm) it is cut off by a fault. North of the farm the bed is about .36m wide and much shattered, dipping at up to 40° in places. Near the farm the vein is described as being about .46m wide but very hard. The worked-out surface part of the outcrop was soft earthy manganese oxide. [Dewey & Bromehead 1915: 52]

Owners

1887–1890		Dyffryn Mining Co. Ltd agent 1888–1890 H J Wright
1891–1894		William Ryder
1895–1904		William Lewis
1907–1908		Edward W Turner agent William Jones

Recorded output

	(tons)	Manpower underground surface
1887	nil	6	2
1888	1,889	10	3
1889	2,803	22	3
1890	982	2	0
1891	nil	0	4
1892	nil	0	2
1893	nil	0	1
1894	nil	0	1
1895	200	0	1
1896	373	5	0
1897	130
1898	40
1899	5
1900	12
1901	300
1902	96
1903	24
1904	31
1907	440
1908	29
Total	7,354

Transport

Presumed cartage to Llanbedr station. A track can be traced for most of the extent of the mines north of the farm house.

Remains

Adits and loading bank to north of farm at SH63413202 there are workings on either side of river north of the farm. (March 2005)

The workings on the east side of the river pre-date those on the west side (see picture below).

The adits by the farm were opened (presumably by Turner) in 1907–1908 [Dewey & Bromehead 1915: 52].

Described as “idle” in 1923 [Dewey & Dines 1923: 65].

See also Cwm Mawr No 2 and Cambrian

Bridge abutments

Bridge abutments for bridge over river from workings on east bank.

The abutment on the right hand side has been over-tipped from later workings.

Bridge abutment

A further view of the east bridge abutment pictured above.

Track or tramway formation

The track, possibly a tramway formation, leading from the bridge location shown in the pictures above. The track has been built over by an incline to later workings, and has been tipped on behind the camera position.

Front page

Index of mines

Area maps: Arenig, Harlech