Go to the Main Scottish Cave and Mine Database Search PageMap with: Google Map, or OS Explorer Map from Streetmap.co.uk
None.
Go to the Main Scottish Cave and Mine Database Search Page
Cassley Power Station, Loch Shin, Sutherland.
| NGR: | NC 39645 23237 |
| WGS84: | 58.16878, -4.72776 |
| Length: | 4000 m |
| Vert. Range: | 115 m |
| Altitude: | 90 m |
| Geology: | Altnaharra Psammite Formation - psammite |
| Tags: | Rising, Adit, Tunnel, ManMade |
| Registry: | second |
Tunnel, Hydro Electric scheme.
The 4km-long Cassley tunnel diverts water from the River Cassely via the Duchally weir to the Cassely Power Station. Completed by 1960, the Loch Shin project was a colossal and ambitious undertaking and today remains the most northerly hydroelectric scheme in Scotland. [Highland Archive]
Alternative Names: None recorded.
Notes: Sinks at elevation of 205 m and rises at Loch Shin (90 m). The path between the inlet & outfall passes through the hill of Maovally (height of 511m).
Intake behind dam at Duchally Headpond constructed 1958-59 & labelled along with power station on OS map.
Cassley is a 10 MW power station on the SW shore of Loch Shin.
Given length / VR approx.
Links and Resources:
This entry was last updated: 2025-10-13 23:40:21
Errors or omissions in this information? Submit corrections/additions/comments for this entry to the registrars.
All database content Copyright 2026 Grampian Speleological Group.
Web Registry software by Matt Voysey.