Former Navigation Colliery Heapstead and Main Revetment Wall is a Grade II listed building in the Caerphilly local planning authority area, Wales. First listed on 28 September 1994. Colliery heapstead.

Former Navigation Colliery Heapstead and Main Revetment Wall

WRENN ID
crooked-copper-owl
Grade
II
Local Planning Authority
Caerphilly
Constituency
Newport West and Islwyn MP: Ruth Jones (Lab)
Country
Wales
Date first listed
28 September 1994
Type
Colliery heapstead
Address
Former Navigation Colliery Heapstead and Main Revetment Wall, Navigation Colliery Crumlin, Crumlin
OS grid reference
ST 211 988
Coordinates
51.68295, -3.14256
Source
Cadw listing

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

Description

The Former Navigation Colliery Heapstead and Main Revetment Wall is a substantial wall made of rubble sandstone, maintaining a consistent height across the main terrace and gradually sloping down to the lower ground level on the right. This section is faced with brick and serves as a track that connects the road level to the main terrace. On the eastern sides of the wall, two Winding Engine Houses are constructed directly onto it. The wall features numerous iron fixings and putlog holes, which were used to support gantries and screens in the past. There is a large semi-circular brick archway located in the center right, which is now blocked; this archway once led to the northern shaft and provided access for coal wagons. Additionally, a Fan Drift enters the Heapstead on the left, leading to the southern shaft. A chimney rises from the center rear of the structure.

Local climate

Former Navigation Colliery Heapstead and Main Revetment Wall sits in a wetter-than-average part of the UK, with an average of 1,020 mm of rain a year. This makes it wetter than 81% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 75% of listed buildings.

It experiences an average of 43 freeze-thaw cycles a year, more than 81% of listed buildings. Of these, 20 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

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  • Detailed attributes — period, style, materials, features
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Nearby listed buildings

  1. Former Navigation Colliery Power House and Pump House Grade II* 14 m
  2. Former Navigation Colliery North Winding Engine House Grade II* 20 m
  3. Former Navigation Colliery Electrical Outbuilding Grade II 26 m
  4. Former Navigation Colliery Middle Revetment Wall Grade II 30 m
  5. Former Navigation Colliery Workshops and Stores Grade II 36 m
  6. Former Navigation Colliery Chimney Grade II* 71 m
  7. Former Navigation Colliery Lamp Room Grade II 85 m
  8. Former Navigation Colliery Fan House and Fan Drift Grade II* 123 m
  9. Former Navigation Colliery South Winding Engine House Grade II* 126 m
  10. Former Navigation Colliery Offices Grade II 142 m