2017 – An important year for River Aire fish passage
Work has been going on for a number of years to improve fish passage for migratory fish in the Aire below Leeds. This work has provided fish passes at Castleford, Lemonroyd, Fleet, Rothwell Country Park and Thwaite Mills.
Fish passes are required on a further four weirs downstream of Leeds. All the four weirs are owned by the Canal and River Trust and are used for navigational purposes. Three of the four weirs are major ones and are situated at Chapel Haddlesey, Knottingley and Knostrop. The other weir, which is not quite as big a barrier to fish as the others, is at Crown Point in the centre of Leeds.
Major developments are currently taking place which will provide fish passes on all four of the weirs mentioned above. Two of the weirs will be furnished with fish passes as a result of hydro electricity schemes whereas the other two are included as part of the Leeds Flood Alleviation Scheme (Leeds FAS) and will receive fish passes as the weirs are rebuilt. The time scale for completion and brief background notes are shown below. The result of these developments will be that migratory fish such as salmon, sea trout and eels should be able to reach the centre of Leeds with relative ease by September 2017.
This weir is at the tidal limit and was first constructed in 1702. UK Hydro Ltd started work in August 2016 on two Archimedes Screws, a fish pass and a by-wash channel. The screws are already installed and work has begun on the fish pass. The fish pass is expected to be in use by fish at some point in March 2017.
This is the biggest weir on the River Aire being some ten feet high. The weir was reconstructed in the 1970s.
In the summer of 2016, Barn Energy commenced construction of a Kaplan Turbo and fish pass on the weir. Power generation is expected to start in the late summer of 2017 and the fish pass should be in use by the end of September 2017.
Knostrop Weir, substantially rebuilt in 1905, has already been removed and replaced by a temporary weir. The weir is being rebuilt as a moveable weir as part of the Leeds Flood Alleviation Scheme and the new weir will include a fish pass. The work is expected to be complete by May 2017.
Crown Point (Leeds)
The weir at Crown Point has already been substantially demolished under the Leeds Flood Alleviation Scheme. The weir is being rebuilt as a moveable weir and will include a fish pass. Work should be complete by July 2017.
In the longer term we continue to develop and seek funds for our DNAire project to remove all barriers to passage on the main spine of the river and enable a sustainable population of migratory fish.
Thanks to Kevin Sunderland for writing this article and his undying enthusiasm and passion for getting salmon back to Skipton and beyond – his dream is beginning to look real,