The Weir is our largest Fresh water tank, and is a replica of one of the Weirs on the River Corrib. The River Corrib has a dam made of approx. 20 Weirs, and these can be lowered or raised individually or collectively to control and monitor the water flow from the River, down into the estuary at Galway Bay.

At full flood, more than 260,000 litres of river water per second flow down over the Weirs!

As these Weirs effectively form a river-wide dam, fish passes have been built it the side of the river to allow migrating Salmon and Common Eels to travel back up the river to their breeding grounds on the other side.