MHG49270 - Loch Treig Dam


The first rock fill embankment dam in Scotland, forming part of the Lochaber water power scheme and aluminium smelter, one of the most significant civil engineering schemes of the 20th century in Britain.

Type and Period (1)

  • DAM (Built, 20th Century - 1921 AD to 1926 AD)

Protected Status

Full Description

NMRS Report: (12/06/2006 10:31:24)
NN37NW 8 34782 77182

See also NN37SW 3.

For (associated) Fort William, Aluminium Smelter (centred NN 12556 75030), see NN17NW 16.00.

For associated construction railway, see NN37NW 7.

Dam [NAT]
Sluice [NAT] (at NN 34763 77151)
OS 1:10,000 map, 1992.

This relatively small dam blocks the River Treig and retains the waters of the lengthy (N-S) Loch Treig.
The map sheet assigned to this record defines the centre of the structure. The available map evidence indicates that it extends from NN c. 34738 77161 to NN c. 34831 77121.
Information from RCAHMS (RJCM), 28 October 2005. <1>

This dam was added to the statutory list in November 2011 having been reviewed as part of the Hydroelectric Power Thematic Survey 2010. <2>

Sources/Archives (2)



Grid reference Centred NN 34779 77157 (94m by 66m) (2 map features)
Map sheet NN37NW
Geographical Area LOCHABER

Finds (0)

Related Monuments/Buildings (0)

Related Investigations/Events (0)

External Links (2)

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