Cwm Mawr No. 1

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Alternative names	Nant Steicyn Cwm Mawr & Nant Steicyn Cambrian ? [GAT SMR: 21749]
Location	SH635322 (Area map showing location.)
Parish	Llanfair
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 .36 m wide and much shattered, dipping at up to 40° in places. Near the farm the vein is described as being about .46 m 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
Production and Employment	(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)

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

From 21 July to 13 October 1905, about 30 tons of manganese at Cwm Mawr were offered for sale by auction [Cambrian News 21/7/1905 p. 1 and subsequent issues].

The adits by the farm were opened (presumably by Turner) in 1907–1908 [Dewey & Bromehead 1915: 52]. In March 1907 Edward Williams was injured by a fall of loose rock [North Wales Express 11/10/1907 p. 6].

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.