The loch dates from 1895, when a dam was built to hold back the Tannoch Burn, and create a shallow body of water. This then provided a steady supply of water to power a small hydro-electric scheme in Milngavie. See http://www.tannochloch.co.uk/history.html
Uploaded to Geograph by Richard Sutcliffe on 28 March 2016
Photo © Richard Sutcliffe, 28 March 2016. Licensed for reuse under this Creative Commons licence