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Cof Cymru: National Historic Assets of Wales · Wales

Weir on E side of Tennant Canal at Red Jacket Pill

Coedffranc, Neath Port Talbot, Wales

A Grade II listed building in Red Jacket Pill, Coedffranc, Neath Port Talbot, designated on 29 March 2000.

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Weir on E side of Tennant Canal at Red Jacket Pill, Coedffranc, 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
Transport
Date of designation
29 March 2000
Locality
Red Jacket Pill
Community
Coedffranc
Unitary authority
Neath Port Talbot
Country
Wales
Coordinates
51.63629, -3.84514
Cadw reference
23077

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)
  • 1637 · The fourth table of England. Cornub. Devonia, Somerset etc. (David Rumsey Map Collection, Stanford Libraries)
  • 1865 · England and Wales. England No. 6. (David Rumsey Map Collection, Stanford Libraries)
  • 1891 · Sheet 10. Ordnance Survey of England and Wales. . (David Rumsey Map Collection, Stanford Libraries)
  • 1897 · 247 Swansea (Hills) (David Rumsey Map Collection, Stanford Libraries)

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This record in Cadw's own full report ↗

Cadw's description

At Red Jacket Pill on N side of a modern concrete weir and immediately S of SW corner of gas works.

The Tennant Canal was built 1820-4, engineered by William Kirkhouse. The head of the canal was at Aberdulais, where it joins the Neath Canal, and ended at Port Tennant on the E side of the River Tawe in Swansea. Traffic was carried on the canal until 1930s. The weir, constructed to carry off excess water and prevent the canal bursting its banks, is within a raised section of canal embanked across marshy ground.

The top of the weir is approximately 5m long and water is channelled from the canal through 6 shallow segmental-arched culverts below the towpath. The arches are of dressed sandstone with the core stonework of the culverts visible on the upper surface, but with a concrete coping added on the canal side. On E side is a short cascade of stepped stonework. Its flanking walls survive only in part, having been mainly washed away, and are of rubble stone with flat dressed copings.

Listed for industrial archaeological interest as an original built component of the Tennant Canal and for group value with other structures associated with the canal.

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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