Go to the Main Scottish Cave and Mine Database Search PageMap with: Google Map, or OS Explorer Map from Streetmap.co.uk
Go to the Main Scottish Cave and Mine Database Search Page
S of Orrin Power Station, Loch Achonachie, Ross & Cromarty.
| NGR: | NH 43593 54196 |
| WGS84: | 57.55073, -4.61538 |
| Length: | 5200 m |
| Vert. Range: | Not recorded |
| Altitude: | 184 m |
| Geology: | Tarvie Psammite Formation - psammite |
| Tags: | Rising, Tunnel, ManMade |
| Registry: | second |
Tunnel, Hydro-electric scheme.
From the NE shore of Loch Orrin, a tunnel trends NE as far as [NH 4359 5420] where a surface pipeline carries water downhill to the powerhouse below. En route is a surge shaft located at [NH 4358 5396].
"A tunnel was constructed through the hillside, just over 17,000 feet (3.2 mi; 5.2 km) long, with an 8+1⁄2 ft (2.6 m) wide, concrete lined, D section." [Wiki]
Alternative Names: None recorded.
Notes: Given length approx.
Intake point possibly embayment along Loch Orrin at [NH 3972 5060].
Hydrographic Feeds: Loch Orrin
Links and Resources:
This entry was last updated: 2025-10-27 13:44:29
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.