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Nevis Tunnel

Fort William, Lochaber, Invernessshire.

Hydro electric scheme tunnel (constructed 1926-30).

"runoff was collected in two reservoirs, Loch Laggan and Loch Treig, connected by a tunnel 23.4 miles long and 15 ft diameter. The supply of water was supplemented by the diversion of the upper waters of the Spey into Loch Laggan from a dam 900 ft long and 30 ft high, built 2 miles above Laggan Bridge. The most remarkable feature of the scheme was the construction of a pressure tunnel 15 miles long beneath Ben Nevis, from Loch Treig to the entry with steel pipes situated 600 ft above the power station at Fort William...

... In driving the tunnel, four vertical access shafts were sunk and seven horizontal adits driven to allow 22 separate working faces, all in solid rock." [Lochaberas.co.uk]

Alternate Names: Lochaber Tunnel

Notes: Given coordinates are for resurgence (drained by large dual pipes down hillside).

Hydrographic Feeds: Loch Laggan / Loch Treig / various streams