The heel post of the top gate on the towpath side has snapped. Engineers have examined the gate and found that a temporary repair is not possible.
Both gates will be craned out and replaced. This means taking them to the Stanley Ferry workshop so that replicas can be made.
The Canal and River Trust estimates that the stoppage could be for at least three weeks. Updates will be issued when a date for completion is known.
Shepley Bridge Lock is on the Mirfield Cut between Cooper Bridge and Wakefield.
Downstream approach to Shepley Bridge Lock