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Gleann a' Mhill Bhig, W of Loch Sloy, Dumbartonshire.
| NGR: | NN 26000 13400 |
| WGS84: | 56.28106, -4.81227 |
| Length: | 1700 m |
| Vert. Range: | Not recorded |
| Altitude: | 350 m |
| Geology: | Garabal Hill - Glen Fyne Pluton / Beinn Bheula Schist Formation |
| Tags: | Adit, Tunnel, ManMade |
| Registry: | second |
Tunnel, Hydro electric scheme.
"A pipeline runs to a dam on a tributary of the Eas Riachain and a second dam on the main Eas Riachain, where there is an intake. A tunnel runs to the north east to reach the Eas an Tuirc, where there is a dam and another on a tributary. The tunnel continues to the east to empty into the Allt a' Chnoic". [Wiki]
Passage is through bedrock, some of which is faulted granite [BGS]
Alternative Names: Gleann Meall Beag - Allt a' Chnoic Tunnel
Notes: High-level SEE overview map suggests that the outfall point is at approx. [NN 260 134], near to (or in) the W bank of the Allt a' Chnoic.
Given length & 6 fig. NGR are estimates.
Refered to as 'Gleann Meall Beag - Allt a' Chnoic Tunnel' by BGS.
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This entry was last updated: 2025-10-15 03:47:00
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