The weir at Diglis was the first insurmountable barrier that shad encountered on their migration route. Here we have built our largest deep-vertical-slot fish pass. It’s 100 metres long, 8 metres wide and 5 metres deep.
At the time of construction, it was the largest fish pass of it’s kind in England and Wales. Uniquely, it contains a underwater viewing window that allows us to film migrating fish using the pass and also give visitors their own chance to glimpse wild fish swimming by.