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Lednock Reservoir [Outfalls]

Loch Lednock Reservoir, Glen Lednock, NW of Comrie, Perthshire.

Tunnels, Hydro electric scheme.

On the N shore of Lednock Reservoir (140m NW of Lednock Dam's NE end), a concreted double-outfall point for two significant water diversion tunnels has been barriered off using metal grating. The left-hand (NW) portal is the S mouth of the Almond Tunnel (5200m long), whilst the right-hand (SE) portal is that of the Invergeldie Tunnel (1900m-long). Both tunnels become un-lined further in.

In low water conditions the circular portals are filled mostly with air, and the combined outflow flows down a water-chute into the reservoir.

Alternate Names: Almond Tunnel, Invergeldie Tunnel

Notes: Part of the Breadalbane Hydro-Electric Scheme, ultimately supplying St Fillans Power Station at Loch Earn (& later Dalchonzie Power Station).

Hydrographic Feeds: Invergeldie Burn, River Almond

Hydrographic Resurgences: Loch Lednock Reservoir