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Cof Cymru: National Historic Assets of Wales · Wales

Fourth arch over South Wales Railway at Peniel Green

Llansamlet, Swansea, Wales

A Grade II listed building in Peniel Green, Swansea, Llansamlet, designated on 16 January 2004.

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Fourth arch over South Wales Railway at Peniel Green, Llansamlet, Swansea, 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
16 January 2004
Locality
Peniel Green
Town
Swansea
Community
Llansamlet
Unitary authority
Swansea
Country
Wales
Coordinates
51.66071, -3.87734
Cadw reference
82385

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

Crossing the South Wales Railway some 525m SE of Llansamlet station. This arch is the most S structure as the railway curves S.

One of four hump-backed flying arches built over railway line and intended to stabilise the cutting banks where slips had occured shortly after the line opened in 1850. The line was engineered by I. K. Brunel for the South Wales Railway. The arches are shown on the 1885 OS map which also shows a track crossing this fourth arch N from Llwynbrydrau to Peniel Green Road.

One of four broad stone arches of rubble stone with cut stone voussoirs to segmental arches. Arches are some 12m wide and approximately 20 to 25m long. Arches are weighted on top with copper slag and provided with retaining walls on each side holding back earth.

Included for its special historic interest as one of four unusual engineering structures, probably by I. K. Brunel, the renowned Victorian engineer.

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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