Lock No 68 is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 28 August 1998. Lock. 1 related planning application.
Lock No 68
- WRENN ID
- empty-mullion-raven
- Grade
- II
- Local Planning Authority
- Brecon Beacons National Park
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 28 August 1998
- Type
- Lock
- Address
- Lock No 68, Cwm Crawnon, Llangynidr, Powys, NP8 1ND
- OS grid reference
- SO 138 198
- Coordinates
- 51.87067, -3.25282
- Source
- Cadw listing
Description
Lock No 68 is the uppermost of a group of three locks that complete the flight of five located west of Llangynidr. This lock raises the canal by 17 meters over a distance of 37 kilometers towards Brecon. Like the neighboring locks, the chamber has been partly refaced in brick. This lock features modern paddle gear and gates that were replaced in 1985. Additionally, the adjacent bank retains a stop-lock.
Local climate
Lock No 68 sits in one of the wettest parts of the UK, with an average of 1,180 mm of rain a year. This makes it wetter than 90% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 78% of listed buildings.
It experiences an average of 57 freeze-thaw cycles a year, more than 96% of listed buildings. Of these, 32 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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- No EPC on record for this property
- No sale records on file
- Related listed building consents — 1 application
- 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
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.
- 1 Lock No 67
- 2 Lock No 66
- 3 Foxton Locks, Grand Union Canal Leicester Line
- 4 Leeds and Liverpool Canal, Seven Canal Locks Spaced Along 1 Kilometre of Leeds Liverpool Canal from Top Lock Bridge on Copthurst Lane at North End to Junction with Walton Summit Branch at South End
- 5 Flight of 5 Locks on the Former Somersetshire Coal Canal
this building 1 similar nearby listed buildings
Nearby listed buildings
- Lock No 67
- Tofs Lock Bridge (Canal Bridge No 135)
- Lock No 66
- Workhouse Bridge (Canal Bridge No 136)
- Workhouse Bridge (Canal Bridge No.136)
- Coombes Lock Bridge (Canal Bridge No 134)
- Limekiln at Monmouthshire and Brecon Canal Sanitary Station
- Lock No 65
- Embanked Aqueduct carrying Monmouthshire and Brecon Canal over Afon Crawnon
- Dan-y-graig Bridge (Canal Bridge No.137)