According to Wikipedia (so...you know...totally reliable) the Lagan Weir was completed in 1994. Basically, it was built because the Lagan was completely disgusting. I remember a friend telling me that she was canoeing down the river with her girl scout troupe and they were told that if they fell in, they wouldn't be allowed back in to the canoe because the water was too contaminated. They would be allowed to hold on to the edge and dragged to safety, but nothing more!
The water isn't half as bad as it used to be. I still don't think it's the cleanest river in the world, but it's much better than it used to be anyway!
It's also not an eyesore, which is nice, Plus, it's all floodlit at night which has prettied up the area no end! read more