Pitlochry, Hydro Electric Dam.
Each year between April and October an average of 5,400 salmon fight their way upstream from Atlantic feeding grounds to spawn in the upper reaches of the River Tummel. They must by-pass the Hydro-Electric dam at Pitlochry by travelling through the interconnected pools that form the Pitlochry "fish ladder" up and around the dam. Three resting pools provide patches of slack water for a break in the struggle against the current.