Glenmoriston Power Station

Glenmorriston Power Station is the bottom station on the cascade development forming the northern part of the Great Glen scheme. The station is situated deep underground beneath the downstream face of Dundreggan Dam (see separate item). It was amongst the first underground stations to be commissioned by the board. The station has a capacity of 36MW, the turbines and turbine hall were fully refurbished in 1999. Glenmoriston Power Station is a good example of the early use of underground stations developed by NoSHEB from around 1956 onwards. The Great Glen scheme is characterised by the use of underground stations with other examples including Ceannacroc and Livishie. The design of subterranean stations was pioneering for this date with most developments using surface stations and steel penstocks for the pressure system. PL Payne, 1988, 5; E Wood, 2002, 38; J Miller, 2002.

http://www.corestore.org/Dundreggan.htm

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.