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 […]
Category Archives: Fish passage
Design problems with the new fish pass at Ennis
We visited the site of the new Larinier fish pass at the Mill Weir on the River Fergus at Ennis this week as part of an ongoing review we are […]
A sustainable compensation flow is needed for the Old River Shannon
One of the key environmental issues on hydroelectric schemes with diverted river stretches, such as the lower River Shannon, is that discharges are at a consistent uniform low flow for […]
Jamestown Weir – a salmon beat of the future?
The Shannon is a wide and slow-flowing river with only a limited number of shallow stretches (as we all know). Indeed, from Battlebridge just south of Lough Allen to Killaloe […]
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 […]
Mulkear Life’s lamprey pass – where is the evidence that it works?
As part of the Mulkear Life project, a ramp pass was installed on a weir at Annacotty on the Lower River Mulkear for the purpose of allowing sea lampreys to […]
