Rochdale Canal Lock 20 Wadsworth Mill Lock is a Grade II listed building in the Calderdale local planning authority area, England. First listed on 22 February 1984. Lock. 1 related planning application.

Rochdale Canal Lock 20 Wadsworth Mill Lock

WRENN ID
guardian-mortar-winter
Grade
II
Local Planning Authority
Calderdale
Constituency
Calder Valley MP: Josh Fenton-Glynn (Lab)
Country
England
Date first listed
22 February 1984
Type
Lock
Address
Rochdale Canal Lock 20 Wadsworth Mill Lock, Todmorden
OS grid reference
SD 932 235
Coordinates
53.70843, -2.10412
Source
Historic England listing

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

Description

Lock 20, also known as Wadsworth Mill Lock, was built in 1798 and designed by engineer William Jessop, with William Crosley as the resident engineer. The lock features large dressed stone retaining walls that include rebates for gates. At the northern end, there are two rebates intended for a double set of bottom gates. The lock was designed to accommodate vessels measuring 74 feet long, 14 feet 2 inches wide, and with a draft of 4 feet from the Manchester end. The purpose of the double set of bottom gates was to facilitate the passage of 57-foot vessels from the Calder and Hebble, which would save approximately 50 tons of water. However, there is no evidence that the intended double gates were ever installed.

Local climate

Rochdale Canal Lock 20 Wadsworth Mill Lock sits in a wetter-than-average part of the UK, with an average of 1,130 mm of rain a year. This makes it wetter than 89% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 82% of listed buildings.

It experiences an average of 57 freeze-thaw cycles a year, more than 97% of listed buildings. Of these, 34 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
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