National
Aucha Lochy is an impounding reservoir, situated 1 km to the north/north east of Campbeltown and is the main source of freshwater for the town.Scottish Places - Aucha Lochy The loch is also fished by Kintyre Angling Club. The earth fill dam was completed in 1905 and has a height of 8.8 metres.
See also List of lochs in Scotland List of reservoirs and dams in the United Kingdom
Sources
"Argyll and Bute Council Reservoirs Act 1975 Public Register"