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Cof Cymru: National Historic Assets of Wales · Wales

Bwlch y Clawdd Dyke

Treorchy, Rhondda Cynon Taff, Wales

A scheduled monument in Treorchy, Rhondda Cynon Taff, recorded as Linear Earthwork.

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Bwlch y Clawdd Dyke, Treorchy, Rhondda Cynon Taff, 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
Linear Earthwork
Period
Unknown
Date of designation
21 November 1996
Community
Treorchy
Unitary authority
Rhondda Cynon Taff
Country
Wales
Coordinates (centre of the scheduled area)
51.63907, -3.53302
SAM number
GM500
Cadw record number
1459

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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)
  • 1830 · V.3:11-15:XV. Britisches Reich. A. Kon: England. b. Frstenthum Wales: Shire: 37-40 (David Rumsey Map Collection, Stanford Libraries)
  • 1865 · England and Wales. England No. 6. (David Rumsey Map Collection, Stanford Libraries)
  • 1907 · 248 Pontypridd (Hills) (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.

The monument consists of a linear earthwork, a substantial bank and ditch forming a major boundary between two adjacent landholdings. The dyke is thought to be of early medieval date. Its bank is 4.5m wide and 1.5m high, running for a distance of 200m south-west to north-east across a ridge. The front face may once have been revetted. The north-east half of the dyke has a secondary bank about 12m from it on the outer side of the ditch. The secondary bank is about 2m wide and 0.5m high.

The monument is of national importance for its potential to enhance our knowledge of later prehistoric/medieval defensive oranisation and settlement. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. A linear earthwork may be part of a larger cluster of monuments and their importance can further enhanced by their group value.

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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