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Cof Cymru: National Historic Assets of Wales · Wales

Parys Mountain: Windmill, Engine House, Precipitation Pits and Great Opencast

Amlwch, Isle of Anglesey, Wales

A scheduled monument in Amlwch, Isle of Anglesey, recorded as Tower (Post Medieval/Modern).

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Parys Mountain: Windmill, Engine House, Precipitation Pits and Great Opencast, Amlwch, Isle of Anglesey, with a pin at the register's coordinates
Ordnance Survey six-inch map, 2nd edition (1888–1913), covering this location. Courtesy of the National Library of Scotland. The pin is ours, placed from the register's coordinates.

The record

Designation
Scheduled monument
Site type
Tower
Period
Post Medieval/Modern
Date of designation
7 October 1991
Community
Amlwch
Unitary authority
Isle of Anglesey
Country
Wales
Coordinates (centre of the scheduled area)
53.38815, -4.34206
SAM number
AN111
Cadw record number
252

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

5 historical maps cover this location, the earliest the 1608 map "(13) Cambriae Typus." (David Rumsey Map Collection, Stanford Libraries).

Historical maps covering this location

  • 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 · 93 Holyhead (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1901 · Sheet 9 and 10. (David Rumsey Map Collection, Stanford Libraries)
  • 1919 · Sheet 41. Anglesey. (David Rumsey Map Collection, Stanford Libraries)

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This record in Cadw's own full report ↗

Cadw's description

The following provides a general description of the Scheduled Ancient Monument.

4 elements - Windmill tower (A), engine house (B), precipitation pits (C) and Great Opencast (D).

Work began on Parys Mountain copper mine about 1765, though there are traces of prehistoric and Roman mining. Opencast mining ceased about 1800, though underground work continued until about 1880. The precipitation pits, engine house and windmill (which assisted a nearby steam engine in pumping a mine work) are probably nineteenth century in date.

The monument is of national importance for its potential to enhance our knowledge the mining 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

Other entries of the same register within about three miles of this one, by straight line.

Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), 2026-09-07, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Cadw, the Welsh Historic Environment Service · Open Government Licence v3.0
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