Cof Cymru: National Historic Assets of Wales · Wales
Gorseddau or Ynysypandy Slate Factory
Dolbenmaen, Gwynedd, Wales
A scheduled monument in Dolbenmaen, Gwynedd, recorded as Slate Mill (Post Medieval/Modern).
The record
- Designation
- Scheduled monument
- Site type
- Slate Mill
- Period
- Post Medieval/Modern
- Community
- Dolbenmaen
- Unitary authority
- Gwynedd
- Country
- Wales
- Coordinates (centre of the scheduled area)
- 52.96804, -4.15993
- SAM number
- CN160
- Cadw record number
- 2439
Slide toward Today to fade the historical sheet and see the modern map underneath.
David Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesBayerische Staatsbibliothek, Munich
5 historical maps cover this location, the earliest the 1588 map "Ortelius, Abraham: Theatro De La Tierra Universal. 0" (Bayerische Staatsbibliothek, Munich).
Historical maps covering this location
- 1588 · Ortelius, Abraham: Theatro De La Tierra Universal. 0 (Bayerische Staatsbibliothek, Munich)
- 1608 · (13) Cambriae Typus. (David Rumsey Map Collection, Stanford Libraries)
- 1896 · Sheet 7. Ordnance Survey of England and Wales. (David Rumsey Map Collection, Stanford Libraries)
- 1899 · 119 Snowdon (Hills) (David Rumsey Map Collection, Stanford Libraries)
- 1901 · Sheet 9 and 10. (David Rumsey Map Collection, Stanford Libraries)
Cadw's description
Summary description and reason for designation
The following provides a general description of the Scheduled Monument.
The magnificent remains of a slate mill erected between 1855 and 1857 as part of the Gorseddau Quarry complex. The building is of three storeys and attics. The tramway bringing raw materials in entered on the upper floor, and slate waste was removed by a tramway from the middle floor; the processing was done on these two floors. The middle floor lies mostly on solid rock, and the lower floor, because of the nature of the sloping site, consists of only one quarter of the mill floor area. The wheel-pit lies in the centre of the building, and originally contained a 26 ft diameter pitch-back wheel.
The building is now a stone shell, with no internal fittings or roof. The terrace which carried the incoming tramway is well preserved, and the bases of the stone pillars which supported the aqueduct are visible.
The monument is of national importance for its potential to enhance our knowledge of the slate industry. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. The structures themselves may be expected to contain archaeological information concerning chronology and building techniques.
The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.
Nearby in the register
- Ynys Pandy felin lechiIndustrialunder 1 mi
- Pont y pandyTransportunder 1 mi
- Telephone Call-box at YnysypandyCommunicationsunder 1 mi
- Farm Building at EreiniogAgriculture and Subsistenceunder 1 mi
Other entries of the same register within about three miles of this one, by straight line.