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Lock 77 Dewatering, Grand Union Canal, Watford

Type: Navigation Closure

Waterway(s): Grand Union Canal

From: 21 October 2025, 8am

To: 22 October 2025, 3:30pm inclusive

Region: London and South East

Reason: Underwater Obstruction

Location

Closest waterwayGrand Union Canal
Starts atLock 77, Ironbridge Lock
Ends atLock 77, Ironbridge Lock

Description

Original 16 October 2025, 8:55am

Top stop plank installation is required to dewater the lock head to identify and if possible, remove obstructions blocking ground paddle culverts at lock 77 Iron Bridge.

We will also take the opportunity to refurbish all paddle connections and fixings below water level.

No assisted passages will be available.

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