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Cof Cymru: National Historic Assets of Wales · Wales

Foel Valve Tower

Rhayader, Powys, Wales

A Grade II* listed building in Elan Valley, Rhayader, Powys, designated on 31 July 1995.

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Foel Valve Tower, Rhayader, Powys, 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
31 July 1995
Locality
Elan Valley
Community
Rhayader
Unitary authority
Powys
Country
Wales
Coordinates
52.26398, -3.59769
Cadw reference
16201

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)
  • 1830 · V.3:11-15:XV. Britisches Reich. A. Kon: England. b. Frstenthum Wales: Shire: 37-40 (David Rumsey Map Collection, Stanford Libraries)
  • 1883 · Watershed map England, Wales 3. (David Rumsey Map Collection, Stanford Libraries)
  • 1898 · 179 Rhyader (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1901 · Sheet 14. (David Rumsey Map Collection, Stanford Libraries)

Get directions ↗

This record in Cadw's own full report ↗

Cadw's description

Near NE end of Carreg Ddu viaduct.

Part of the Elan Valley reservoir scheme built by City of Birmingham 1893 to 1904. Engineer James Mansergh. The scheme was amongst the greatest civic achievements of the late C19. The Corporation of Birmingham employed direct labour for the scheme which involved the construction of 53 km of railway to transport materials from the Wye Valley line at Rhayader, 4 dams, an aqueduct 126 km long, and a village for construction workers. The height of the reservoirs enabled water to reach the outskirts of Birmingham by gravity alone, without the expense of pumping. Provision was made for future expansion in the Claerwen Valley where the scheme was brought to its current state by the Claerwen dam in 1952. Water supply to Birmingham is taken from this tower.

Round valve tower; brown rock-faced stone. Upper stage has copper dome with low lantern and weathervane, seven round arched windows; towards landward side, doorway onto bridge connecting tower to land; bridge has elliptical arch and parapet which continues round broader lower stage of tower which runs down below water level. At least two tiers of barred round-headed intake windows.
Interior said to contain original operating machinery.

Graded II* as an integral part of one of the greatest civic engineering achievements of the C19.

Group value.

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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