Cof Cymru: National Historic Assets of Wales · Wales
Glasdir Copper and Gold Mine Mill
Brithdir and Llanfachreth, Gwynedd, Wales
A scheduled monument in Brithdir and Llanfachreth, Gwynedd, recorded as Mill (Post Medieval/Modern).
The record
- Designation
- Scheduled monument
- Site type
- Mill
- Period
- Post Medieval/Modern
- Date of designation
- 30 August 2001
- Community
- Brithdir and Llanfachreth
- Unitary authority
- Gwynedd
- Country
- Wales
- Coordinates (centre of the scheduled area)
- 52.78560, -3.87146
- SAM number
- ME206
- Cadw record number
- 1067
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 LibrariesBayerische Staatsbibliothek, MunichDavid Rumsey Map Collection, Stanford Libraries
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 · 135 Harlech (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 monument consists of the remains of a mill, used for processing ore from Glasdir Copper and Gold Mine. The mine was worked from the 1850s to 1915 and its large, stepped ore processing mill on the hillside was developed from the 1850s onwards. The mill complex is an impressive group of structures and includes remains of Frazer and Chalmers concentrating units, Elmore concentrators and crushers, water channels and railways. Frank Elmore's oil flotation system for separating copper pyrite from ore, patented in 1898, was first put into use at Glasdir, and now continues in use world-wide in metalliferous mills.
The monument is of national importance as an exceptionally well-preserved metal mine mill site, where a process of major significance was first used. It has the potential to enhance our knowledge of manufacturing techniques and processes and 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
- Ffrwd-yr-HebogDomesticunder 1 mi
- Tyddyn Bach Round BarrowRound Barrowunder 1 mi
- Coed Mawr FarmhouseDomesticunder 1 mi
- Former Farmhouse at Cae Mawr including attached ByreDomesticunder 1 mi
Other entries of the same register within about three miles of this one, by straight line.