Lock and overbridge at Neath Canal Depot is a Grade II listed building in the Neath Port Talbot local planning authority area, Wales. First listed on 25 February 2000. Canal lock and bridge.

Lock and overbridge at Neath Canal Depot

WRENN ID
drifting-roof-frost
Grade
II
Local Planning Authority
Neath Port Talbot
Constituency
Neath and Swansea East MP: Carolyn Harris (Lab)
Country
Wales
Date first listed
25 February 2000
Type
Canal lock and bridge
Address
Lock and overbridge at Neath Canal Depot, Tonna
OS grid reference
SS 769 987
Coordinates
51.67432, -3.78124
Source
Cadw listing

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

Description

The lock and overbridge at Neath Canal Depot is a structure featuring coursed stone walls and flat stone copings. At the eastern end, there is a concave brick wall with an integral sluice, which has been raised to create a dam for the water further east. The western end contains the partial remains of two lock gates. Above the western end of the lock, there is a renewed bridge that has a stone parapet and concrete decking.

Local climate

Lock and overbridge at Neath Canal Depot sits in one of the wettest parts of the UK, with an average of 1,380 mm of rain a year. This makes it wetter than 97% 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 28 freeze-thaw cycles a year, fewer than 69% of listed buildings. Of these, 12 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
  • 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
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