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Cof Cymru: National Historic Assets of Wales · Wales

Canal Aqueduct over Afon Twrch, including weir (partly in Ystradgynlais community)

Ystalyfera, Neath Port Talbot, Wales

A Grade II* listed building in Ystalfera, Ystalyfera, Neath Port Talbot, designated on 20 December 2002.

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Canal Aqueduct over Afon Twrch, including weir (partly in Ystradgynlais community), Ystalyfera, Neath Port Talbot, 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
Listed building, Grade II*
Broad class
Water Supply and Drainage
Date of designation
20 December 2002
Locality
Ystalfera
Community
Ystalyfera
Unitary authority
Neath Port Talbot
Country
Wales
Coordinates
51.76831, -3.78011
Cadw reference
80809

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 1636 map "Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ..." (David Rumsey Map Collection, Stanford Libraries).

Historical maps covering this location

  • 1636 · Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ... (David Rumsey Map Collection, Stanford Libraries)
  • 1860 · 41. Caermathen. (David Rumsey Map Collection, Stanford Libraries)
  • 1891 · Sheet 10. Ordnance Survey of England and Wales. . (David Rumsey Map Collection, Stanford Libraries)
  • 1898 · 230 Ammanford (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1898 · 230 Ammanford (Outline) (David Rumsey Map Collection, Stanford Libraries)

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This record in Cadw's own full report ↗

Cadw's description

Included at Grade II* as the principal surviving engineered structure of the Swansea Canal. See listed building 25953 for main description. Scheduled Monument GM396.

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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