I often wonder when they say they control the level of the Thurso river from Loch more dam ? I totally agree when it drops below the overflow level thro the fish passage ? But don't you think in high flows spilling over the dam the sluice gate should be closed to give the fish maximin running to the sanctuary into the loch , until the flow through the fish pass is unpassable by the fish. as when the flow is through the sluice the run into the loch for the fish is halted early and the fish have no option but to drop downriver or hold up below the dam ? Its a man made barrier worse than any caul on most rivers.I'm told that raising the loch level ruined it as a fishery but ..... but ..... Well, I'm game to give it a go!