Old Double Lock is a Grade II listed building in the St. Helens local planning authority area, England. First listed on 23 August 1985. Lock.
Old Double Lock
- WRENN ID
- western-corbel-brook
- Grade
- II
- Local Planning Authority
- St. Helens
- Constituency
- St Helens North MP: David Baines (Lab)
- Country
- England
- Date first listed
- 23 August 1985
- Type
- Lock
- Address
- Old Double Lock, Blackbrook Road
- OS grid reference
- SJ 535 960
- Coordinates
- 53.45955, -2.70047
- Source
- Historic England listing
Description
Old Double Lock is a two-rise staircase lock built in 1758, located at the head of a branch to the east of the main canal in Blackbrook Road, St. Helens. It is constructed of stone and has a barrel-shaped plan. The gates have been removed, and the lock is now preserved as a cascade. The north side has been reduced in height. This structure is recognized as the oldest British example of a staircase lock.
Local climate
Old Double Lock 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 77% of listed buildings.
It experiences an average of 30 freeze-thaw cycles a year, fewer than 65% of listed buildings. Of these, 15 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
- 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
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