 The scheme was developed by the North of Scotland Hydro-Electric Board, with plans being approved in 1947.The largest dam of the scheme is at Loch Mullardoch, at the head of Glen Cannich.From there, a tunnel takes water to Loch Beinn a' Mheadhoinn (Loch Benevean) in Glen Affric, via a small underground power station near Mullardoch dam.