Top Lock at Tq 3675 8398 is a Grade II listed building in the Tower Hamlets local planning authority area, England. First listed on 23 October 1990. Lock.

Top Lock at Tq 3675 8398

WRENN ID
first-ledge-yew
Grade
II
Local Planning Authority
Tower Hamlets
Constituency
Stratford and Bow MP: Uma Kumaran (Lab)
Country
England
Date first listed
23 October 1990
Type
Lock
Address
Top Lock at Tq 3675 8398, Hertford Union Canal
OS grid reference
TQ 367 839
Coordinates
51.53809, -0.02967
Source
Historic England listing

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

Description

The Top Lock on the Hertford Union Canal, built around 1830 with 20th-century alterations, is a lock structure made of brick with stone and brick coping. It features two sets of double wooden gates, with the top gates equipped with steel balance beams and the bottom gates having rare cast iron balance beams. The lock includes ground paddle gearing at the top and gate paddle gearing at the bottom. The wing walls are constructed from brick, with stone and concrete coping. Additionally, there are brick heel grips and brick-paved lockside surfaces. The Hertford Union Canal connects the Regent's Canal with the River Lea Navigation and was opened in 1830.

Local climate

Top Lock at Tq 3675 8398 sits in one of the driest parts of the UK, with an average of 690 mm of rain a year. This makes it drier than 96% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 99% of listed buildings.

It experiences an average of 34 freeze-thaw cycles a year, more than 52% 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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