Blackwater Reservoir

For the dam in New Hampshire, see Blackwater Dam

The Blackwater Reservoir is a reservoir created behind a dam in the mountains above Kinlochleven, Lochaber, Highland, Scotland. At over 914 m long, the dam is the longest in the Highlands.

The hydroelectric scheme was constructed in the early 1900s for the British Aluminium Company (later: British Alcan) for the purpose of smelting aluminium and was designed by engineers Patrick Meik and Charles Meik. Chief assistant resident engineer was William Halcrow.