Retaining Wall on SE.Side of River Alun, from Ford to Bridge by Cloister Hall is a Grade II listed building in the Pembrokeshire Coast National Park local planning authority area, Wales. First listed on 26 August 1981. Retaining wall.

Retaining Wall on SE.Side of River Alun, from Ford to Bridge by Cloister Hall

WRENN ID
pitched-sandstone-moth
Grade
II
Local Planning Authority
Pembrokeshire Coast National Park
Constituency
Mid and South Pembrokeshire MP: Henry Tufnell (Lab)
Country
Wales
Date first listed
26 August 1981
Type
Retaining wall
Address
Retaining Wall on SE.Side of River Alun, from Ford to Bridge by Cloister Hall, St. David's and the Cathedral Close
OS grid reference
SM 750 254
Coordinates
51.88213, -5.26917
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The retaining wall on the southeast side of the River Alun, extending from the ford to the bridge by Cloister Hall, is a long structure made of rubble stone. It runs along the canalised section of the river, situated behind the cathedral buildings. The wall stretches from the ford past the footbridge by Pen-y-ffos to the northwest angle of Cathedral Hall. It features a plain design with a flat coping.

Beyond Cathedral Hall, there is a higher garden wall, followed by the western end of the undercroft of the former St Mary's College, which has a high rubble wall. This is succeeded by a low retaining wall leading up to a bridge that carries the derelict remains of an early 20th-century structure associated with Cathedral Yard. At the back of Cloister Hall yard, there is a short length of iron railings.

Throughout the wall, there are various culvert outlets, some of which are linked to Sir George Gilbert Scott's restoration work from the 1860s, while others may be of ancient origin.

Local climate

Retaining Wall on SE.Side of River Alun, from Ford to Bridge by Cloister Hall sits in a wetter-than-average part of the UK, with an average of 1,050 mm of rain a year. This makes it wetter than 85% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 96% of listed buildings.

It experiences an average of 3 freeze-thaw cycles a year, fewer than 99% of listed buildings. Of these, 1 follows at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

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Nearby listed buildings

  1. Footbridge by Pen-y-Ffos Grade II 21 m
  2. Pen-y-Ffos Grade II 31 m
  3. St David's Cathedral Hall (formerly Chapel of St Mary's College) & attached Cloister Ruins Grade I 49 m
  4. Cathedral of St Davids Grade I 57 m
  5. Garden Wall between Pen-y-Ffos and the Treasurer's House Grade II 59 m
  6. Retaining Wall to Churchyard from Deanery Gate to Ford opposite Bishops Palace, including Front Wall Grade II 59 m
  7. Front & Side Garden Wall & Gatepiers to The Arch Deaconry Grade II 67 m
  8. Retaining Wall on NE.Side of River Alun between Bridge by Pen-y-Ffos and Bridge behind Cloister Hall Grade II 67 m
  9. Treasury Gateway (formerly listed separately) Grade II 72 m
  10. Wall of walled garden to S. of Cloister Hall Grade II 75 m