 View of Cwm Ratgoed on 18 October 2008; the northern workings of Cymerau are in the middle distance, and the trackbed of the former Ratgoed Tramway passes below | |
| Location | |
|---|---|
  Cymerau Location in Gwynedd | |
| Location | near Aberllefenni |
| County | Merioneth (now Gwynedd) |
| Country | Wales, UK |
| Coordinates | 52°41′06″N 3°48′50″W / 52.68500°N 3.8140°W grid reference SH 768 102 |
| Production | |
| Products | Slate |
| Type | Quarry |
| History | |
| Opened | c.1860 (southern quarry); c.1880 (northern quarry) |
| Active | c.1860–1914; 1918–October 1946 |
| Closed | October 1946 (both quarries) |
Cymerau quarry was a slate quarry served by the Ratgoed Tramway, a horse-worked section of the Corris Railway. It is located about half a mile north of Aberllefenni in Merioneth (now Gwynedd), North Wales, on the eastern side of the isolated Cwm Ceiswyn. It worked the Narrow Vein, the highest-quality slate vein in the Abercorris Group.