Arch over Culvert is a Grade II listed building in the Neath Port Talbot local planning authority area, Wales. First listed on 25 April 2000. Infrastructure.

Arch over Culvert

WRENN ID
under-marble-briar
Grade
II
Local Planning Authority
Neath Port Talbot
Constituency
Aberafan Maesteg MP: Stephen Kinnock (Lab)
Country
Wales
Date first listed
25 April 2000
Type
Infrastructure
Address
Arch over Culvert, Margam Park, Margam
OS grid reference
SS 802 863
Coordinates
51.56301, -3.72885
Source
Cadw listing

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

Description

This is an open stone-lined culvert featuring flat stone coping. Water flows into the northern end through a round arch made of narrow voussoirs. This arch forms part of the northern boundary wall of the castle gardens, with the top of the wall rising in a semi-circular profile over the arch. At the southern end of the culvert, the water continues underground through a high flat-headed opening. Next to this opening on the eastern side, there are a few stone steps leading down from the south, and a pump is situated within a small square enclosure to the east.

Local climate

Arch over Culvert sits in one of the wettest parts of the UK, with an average of 1,220 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.

It experiences an average of 23 freeze-thaw cycles a year, fewer than 76% of listed buildings. Of these, 9 follow 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.

More on this building

Sign in or create a free account to unlock:

  • No EPC on record for this property
  • No sale records on file
  • No related consent applications matched
  • Detailed attributes — period, style, materials, features
  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
Create free account

Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.

Similar buildings

The closest matches to this building from all 493,000 UK listed buildings, by architecture, period and materials.

See all similar buildings →

this building   1 similar   nearby listed buildings

Nearby listed buildings

  1. Broadwalk Steps Grade II 61 m
  2. Ruins of Chapter House and Vestibule of St Mary's Abbey Grade I 82 m
  3. Ruined Undercroft at St Mary's Abbey Grade I 108 m
  4. St Mary's Abbey Church Grade I 112 m
  5. Stones Museum Grade II 124 m
  6. Churchyard Walls and Gate Piers to St Mary's Abbey Church Grade II 150 m
  7. War Memorial Grade II 160 m
  8. Margam Orangery Grade I 164 m
  9. Stone Steps in Terraced Garden Grade II 168 m
  10. Terrace with Pools and Flower Beds Fronting Margam Orangery Grade II* 175 m