Fish passage issues on the River Brosna at Clara
As part of our River Brosna Special Area of Study 2014, we visited the small hydroelectric station on the River Brosna at Clara on the 30th June 2014. This site…
Tag: Fish passage
The failure of the Ardnacrusha fish-lift
The fish pass at Ardnacrusha is a Borland type vertical fish-lift. The bottom chamber and the vertical shaft are built in an area which was left for a 6th turbine…
Lamprey passage at crump weirs
River lamprey Lampetra fluviatilis is listed under Annex II of the EU Habitats Directive. River lampreys cannot pass crump weirs. It is of concern that these crump weirs are being installed on…
Why are there no salmon in the upper Shannon? : Reason 3
One of the main problems facing salmon in the River Shannon after the Shannon scheme was opened was that the main flow of water was now coming out of the…
Why are there no salmon in the upper Shannon? : Reason 2
Why are there no salmon in the upper Shannon? : Part 2 – Management of Parteen fish pass Unlike the Borland Fish Lift (or Lock) pass that was installed at…
River Shannon salmon – time for some new thinking?
According to the Standing Scientific Committee of the National Salmon Commission, the Conservation Limit for salmon in the River Shannon upstream of the Shannon Dams is 49,624 salmon (note exact figure!).…
