Fish and Eel Siphon - First of its kind in the UK
The Siphon Fish Pass, developed in the Netherlands, is an innovative fish passage system based on the traditional pool and weir fish pass. The Siphon Fish Pass can be utilised to provide migratory fish passage at many natural or manmade watercourse obstructions including weirs, lock structures, sluices and even between different watercourses. The Siphon Fish Pass can allow passage of most types of fish, varying from small coarse fish and eels to large migratory salmonids without compromising any existing flood defences.
Located at Stoke Ferry on the River Wissey - Location details
https://www.youtube.com/watch?v=K0dxRsx4CBw
http://www.aquaticcontrol.co.uk/projects/192/siphon-fish-pass-river-wissey-norfolk and
Aquatic Control Engineering (Link)