Cof Cymru: National Historic Assets of Wales · Wales
Relict Seawall alongside Collister Pill Reen
Magor with Undy, Monmouthshire, Wales
The record
- Designation
- Scheduled monument
- Site type
- Seawall
- Period
- Medieval
- Date of designation
- 18 September 1995
- Community
- Magor with Undy
- Unitary authority
- Monmouthshire
- Country
- Wales
- Coordinates (centre of the scheduled area)
- 51.57495, -2.80093
- SAM number
- MM226
- Cadw record number
- 1420
Slide toward Today to fade the historical sheet and see the modern map underneath.
David Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford Libraries
Shown on 5 historical map sheets, the earliest the 1636 "Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ..." (David Rumsey Map Collection, Stanford Libraries).
Cadw's description
Summary description and reason for designation
The following provides a general description of the Scheduled Ancient Monument.
The monument consists of a seawall running along the western side of Collister Pill Reen. This seawall was erected in the Middle Ages to enable the reclamation of the Gwent Levels in Undy parish and remained a sea defence until the enclosure of Caldicot Moor in 1850. The seawall is an earthen bank between 11m and 12m wide at the back and 5m wide on the top. It stands between 2m and 2.5m above the land to the west, but is almost level with the land on Caldicot Moor.
The monument is of national importance for its potential to enhance our knowledge of coastal defences. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. The structure itself may be expected to contain archaeological information concerning chronology and building techniques.
The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.
Nearby in the register
- Moorgate CottageDomesticunder 1 mi
- Undy Churchyard CrossCrossunder 1 mi
- Church of St MaryReligious, Ritual and Funeraryunder 1 mi
- Great House Farmhouse including attached range of farm buildingsDomesticunder 1 mi
Other entries of the same register within about three miles of this one, by straight line.