Mersey Locks St Helens Canal is a Grade II listed building in the Halton local planning authority area, England. First listed on 31 October 1983. Canal locks.

Mersey Locks St Helens Canal

WRENN ID
grey-rafter-ash
Grade
II
Local Planning Authority
Halton
Constituency
Widnes and Halewood MP: Derek Twigg (Lab)
Country
England
Date first listed
31 October 1983
Type
Canal locks
OS grid reference
SJ 513 842
Coordinates
53.35254, -2.73172
Source
Historic England listing

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

Description

The Mersey Locks on the St Helens Canal, located at Spike Island, were built in 1833 and feature restored gates. These locks are part of a pair that manage a 12-foot difference in water level between the canal and the River Mersey. They are constructed from large timber, with massive posts and rails, and include a canal end gate with a catwalk. The restoration of the east lock's gates and the removal of the gates at the north end of the west lock were part of an enhancement scheme completed in 1981.

Local climate

Mersey Locks St Helens Canal sits in a wetter-than-average part of the UK, with an average of 1,000 mm of rain a year. This makes it wetter than 80% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 63% of listed buildings.

It experiences an average of 31 freeze-thaw cycles a year, fewer than 61% 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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  9. Electricity Sub-Station Grade II 1.1 km
  10. Former Widnes Corporation Bus Depot Grade II 1.1 km