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Quoich Power Station

Hydroelectric Power Station (20th Century)

Site Name Quoich Power Station

Classification Hydroelectric Power Station (20th Century)

Alternative Name(s) Great Glen Hydroelectric Power Scheme

Canmore ID 312931

Site Number NH10SW 3

NGR NH 10700 01180

Datum OSGB36 - NGR


Ordnance Survey licence number AC0000807262. All rights reserved.
Canmore Disclaimer. © Copyright and database right 2024.

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Administrative Areas

  • Council Highland
  • Parish Kilmonivaig
  • Former Region Highland
  • Former District Lochaber
  • Former County Inverness-shire


Field Visit (2010)

Quoich Power Station receives water from Loch Quoich (see separate item) via a tunnel with an integrated surge shaft located to the North of the station. The station contains a single 22MW undershot turbine which is deeply recessed to maximise the available head from the dam. Water from the tailrace feeds into Loch Garry which is regulated by the Garry Dam (see separate item) and is then used for a second time in Invergarry Power Station. Loch Quoich Power Station is a good example of a medium sized power Station, housing a single large turbine and generator. The exterior design of the station echoes that of Invergarry (see separate item) with a recessed deep attic course containing narrow vents. The large central vent also dominates the main façade along with the large vehicular access doorways. There is a transformer station to the East of the station behind a large coped boundary wall. PL Payne, 1988, 5; E Wood, 2002, 38; J Miller, 2002.

Note (25 October 2023)

The Great Glen scheme: Garry/Moriston

The garry part of the scheme uses the storage facility at Loch Quoich to supply Quoich power station via a tunnel from the dam, which is a rockfill type. Two further dams were required at the west end ofthe loch. The outflow goes vis the River Garry to Loch Garry, and eventually via a tunnel to Invergarry power station at Loch Oich. There is a dam at the east end of Loch Garry. A fish stopper and trap were built down stream of Quoich power station.

Storage for Moriston section was provided by damming Loch Loyne and Loch Cluanie, and interconnecting them by a tunnel. A second tunnel from Loch Cluanie supplies Ceannacroc power station which discharges int the River Moriston, which in turn feeds Loch Dundreggan. This loch is also fed by the outflow of Livishie power station, supplied by a system of aqueducts. Glenmoriston power station is just below the Dundreggan dam. Its outflow reaches the River Moriston at Loch Ness via a tunnel. These three power stations were built underground for environmental reasons. The control centre for the the entire scheme is at Fort Augustus. The total output capacity is 114MW. The scheme was built between 1949 and 1962.

Information from NRHE catalogue number WP007424 compiled by George Walker in 2005.


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