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Loch Beannacharan, Deanie Power Station

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Hydroelectric Power Station (Modern)

Site Name Loch Beannacharan, Deanie Power Station

Classification Hydroelectric Power Station (Modern)

Alternative Name(s) Affric/beauly Hydroelectric Scheme; Glen Affric

Canmore ID 171738

Site Number NH23NE 9

NGR NH 29231 38803

NGR Description Centred

Datum OSGB36 - NGR

Permalink http://canmore.org.uk/site/171738

Ordnance Survey licence number AC0000807262. All rights reserved.
Canmore Disclaimer. © Bluesky International Limited 2025. Public Sector Viewing Terms

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Digital Images

View of Strathfarrar Works Contract 101, Deanie Tunnel, Mhuillidh sidestream intake, looking downstream. Scan of glass negative no. 145, Box 843/1, 30/H
View of Strathfarrar Works Contract 101, Deanie Tunnel, Mhuillidh sidestream intake, looking downstream. Scan of glass negative no. 145, Box 843/1, 30/HView of Strathfarrar Works Contract 101, Deanie Power Station, machine chamber, view from the station crane looking north. Scan of glass negative no. 241, Box 870/1, 34/FView of Strathfarrar Works Contract 101, Deanie Tunnel, intake gatehouse from Monar Dam. Scan of glass negative no. 285, Box 870/1, 34/FView of Strathfarrar Works Contract 101, Deanie Power Station, access tunnel portal. Scan of glass negative no. 40, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Tunnel, Deanie riser shaft from below. Scan of glass negative no. 116, Box 843/1, 30/HView of Power Station Access Tunnel Portal during construction work. Copy of negative, Strathfarrar, Box 1139/2, Contract 101, Plate 324. Interior. View of Machine Chamber. Copy of negative, Strathfarrar, Box 1139/2, Contract 101, Plate 331.View of Strathfarrar Works Contract 101, Deanie Power Station, downstream surge chamber, downstream roof abutment. Scan of glass negative no. 75, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Tunnel, intake portal. Scan of glass negative no. 33, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Tunnel, Deanie Aqueduct, upstream tunnel portal. Scan of glass negative no. 134, Box 843/1, 30/HView of Strathfarrar Works Contract 101, Deanie Power Station, transformer bay, concreting transformer base. Scan of glass negative no. 174, Box 843/1, 30/HView of Strathfarrar Works Contract 101, Deanie Power Station, transformer compound. Scan of glass negative no. 299, Box 870/1, 34/FDeanie Power Station EntranceInterior. View of Machine Chamber. Architectural finishes in progress. Copy of negative, Strathfarrar, Box 1139/2, Contract 101, Plate 311. Interior. View from S showing Machine Chamber Roof during construction. Copy of negative, Strathfarrar, Box 843/1, Contract 101, Plate 123.Interior. View of Machine Chamber from Loading Bay. Copy of negative, Strathfarrar, Box 870/1, Contract 101, Plate 269.View of Strathfarrar Works Contract 101, Deanie Tunnel, excavation at intake. Scan of glass negative no. 96, Box 871/2, 34/F View of Strathfarrar Works Contract 101, Deanie Tunnel, lining of low pressure tunnel looking downstream. Scan of glass negative no. 91, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Power Station, machine chamber excavation, downstream roof abutment. Scan of glass negative no. 59, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Tunnel, weak rock section. Scan of glass negative no. 51, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Tunnel, no 1 adit portal. Scan of glass negative no. 13, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Power Station, machine chamber. Scan of glass negative no. 277, Box 870/1, 34/FView of Strathfarrar Works Contract 101, Deanie Tunnel, intake gatehouse from Monar Dam spillway bridge. Scan of glass negative no. 292, Box 870/1, 34/FInterior. View of construction work in the Machine Chamber. Concreting surround to No. 1 Machine Spiral casing, intermediate stage. Copy of negative, Strathfarrar, Box 870/1, Contract 101, Plate 250.View of Strathfarrar Works Contract 101, Deanie Tunnel, batching plant at no 1 adit, looking south. Scan of glass negative no. 86, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Power Station, machine chamber portal concrete looking east. Scan of glass negative no. 76, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Tunnel, surge shaft bench excavation looking west. Scan of glass negative no. 66, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Power Station, downstream surge chamber roof. Scan of glass negative no. 43, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Tunnel, Deanie Aqueduct, lining at riser shaft portal. Scan of glass negative no. 126, Box 843/1, 30/HView of Strathfarrar Works Contract 101, Deanie Power Station, high pressure tunnel no 2, looking downstream. Scan of glass negative no. 158, Box 843/1, 30/H View of Strathfarrar Works Contract 101, Deanie Power Station, high pressure tunnels from generating station loading bay. Scan of glass negative no. 159, Box 843/1, 30/HView of Strathfarrar Works Contract 101, Deanie Power Station, access tunnel portal. Scan of glass negative no. 173, Box 843/1, 30/HView of Strathfarrar Works Contract 101, Deanie Tunnel, upstream surge shaft gatehouse floor and beams to cover. Scan of glass negative no. 281, Box 870/1, 34/FView of Strathfarrar Works Contract 101, Deanie Tunnel, junction of Mhuic sidestream tunnel with low pressure tunnel. Scan of glass negative no. 63, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Power Station, high pressure pipes. Scan of glass negative no. 163, Box 843/1, 30/HView of Strathfarrar Works Contract 101, Deanie Power Station, tailrace tunnel, invert concrete looking upstream. Scan of glass negative no. 251, Box 870/1, 34/FView of Strathfarrar Works Contract 101, Deanie Tunnel, Muillidh intake and retaining wall. Scan of glass negative no. 276, Box 870/1, 34/F View of Strathfarrar Works Contract 101, Deanie Tunnel, surge shaft gate, downstream face. Scan of glass negative no. 296, Box 870/1, 34/FView of Strathfarrar Works Contract 101, Deanie Power Station, downstream surge chamber, Guyrex roof shutter. Scan of glass negative no. 83, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Tunnel, surge and riser shaft excavation, looking west. Scan of glass negative no. 55, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Power Station, machine chamber, shuttering for alternator plinths. Scan of glass negative no. 258, Box 870/1, 34/FView of Strathfarrar Works Contract 101, Deanie Power Station, transformer compound. Scan of glass negative no. 274, Box 870/1, 34/FView of Strathfarrar Works Contract 101, surge shaft, Deanie Tunnel. Scan of glass negative no. 23, Box 871/2, 34/FView of Strathfarrar Works Contract 101, Deanie Tunnel, lining of low pressure tunnel looking downstream. Scan of glass negative no. 106, Box 843/1, 30/HView of Strathfarrar Works Contract 101, Deanie Tunnel, upstream surge shaft looking east. Scan of glass negative no. 122, Box 843/1, 30/HView of Strathfarrar Works Contract 101, Deanie Power Station, machine chamber. Scan of glass negative no. 264, Box 870/1, 34/F

Administrative Areas

  • Council Highland
  • Parish Kilmorack
  • Former Region Highland
  • Former District Inverness
  • Former County Inverness-shire

Archaeology Notes

NH23NE 9.00 centred 2920 3879

NH23NE 9.01 centred NH 29244 38800 transformer compound

NH23NE 9.02 centred NH 2802 3835 Mhuillidh temporary camp site

NH23NE 9.03 centred NH 29449 38711 tailrace outfall

Further Details

Architecture Notes

For manuscripts relating to entire Strathfarrar and Kilmorack scheme see project numbers SA/1960/20/25-27.

Further Details

Activities

Field Visit (2010)

The Hydro-Electric Digitisation Project

Deanie power station receives water from Loch Monar via a 9 km tunnel which culminates in a surge shaft set into the hillside behind the station. The station itself is located in an excavated underground chamber which is accessed by a sloping vehicular access tunnel. The turbine hall contains two turbines with a combined capacity of 38 megawatts. This station is a good example of a medium sized underground station. Where it was possible to build them underground stations were utilised on this scheme because of concerns that the development of hydro in this area would have a negative effect on the scenic amenity. In line with the wishes of James Shearer local stone was used as widely as possible during construction and it is likely that the stone for the construction of the arched entrance was salvaged from the excavations for the main chamber. PL Payne, 1988, 5; E Wood, 2002, 38; J Miller, 2002.

Further Details

Note (25 October 2023)

The Affric/ Beauly scheme

The work was begun on the construction of Mullardoch Dam in 1947. This is of the mass gravity type and is 2385 feet in length by 160 feet in height, impounding 7.5 million cubic feet of water. A tunnel was excavated from Loch Mullardoch to Loch Benevan, and another from the latter loch to Fasnakyle, the main power station on the River Affric, both tunnels being over three miles in length. The Fasnakyle tunnel splits into three steel-lined tunnels near the power station, each supplying a 22,000kW vertical Francis turbo-alternator.

The second stage of the scheme involved the Rivers Farrar and Beauly. Water is impounded in Loch Monar by the Monar Dam, supplying the Deanie power station at the west end of Loch Bennacharan which is dammed at the east end to feed Culligran power station, whose outflow to the River Farrar then flows into the River Glass. These power stations generate 38MW and 24MW respectively. The River Glass flows into the River Beauly which has dams and power stations at Aigas and Kilmorack, each a 20MW run of river station. These dams are provided with flood control, Borland fish passes and compensation water facilities with or without generation. The scheme was completed in 1963.

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

Further Details

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