Gleann Loch
Argyll and Bute, United Kingdom
The loch runs south west to north east and is an impounding reservoir located to the west of Lochgilphead, Scotland. It is one of a number of lochs supplying water to the Crinan Canal. The earthen dam is 15 metres high. Records show the dam was constructed before 1860.
Reservoir data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).