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Caledonian Canal, Laggan Locks to Loch Oich is a section of Scotland's most ambitious early nineteenth-century engineering project, connecting the North Sea to the Atlantic via the Great Glen. This 60-mile waterway was designed to allow merchant vessels to avoid the hazardous voyage around Cape Wrath. The stretch from Laggan Locks to Loch Oich forms part of the middle section of the canal, traversing Inverness-shire through challenging terrain where the route follows the natural depression of the Great Glen.
The foundations of this canal lie upon complex fault zone rocks, including mylonitic and fault-breccia materials formed along ancient geological fractures. This unstable bedrock presented significant engineering challenges during construction, requiring sophisticated solutions to manage water containment and structural stability. The locks themselves represent pioneering hydraulic engineering, designed to raise and lower vessels through the successive water levels of the canal system.
This section of the Caledonian Canal remains an impressive testament to early nineteenth-century civil engineering ambition and skill. The landscape of the Great Glen, with its steep valley sides and exposed fault geology, creates a distinctive setting that shaped both the canal's route and the technical demands of its construction. The monument is protected by Historic Environment Scotland as a scheduled ancient monument under reference SM6494.
Caledonian Canal,Laggan Locks to Loch Oich is a scheduled monument protected by Historic Environment Scotland under reference SM6494. View the official record →
Caledonian Canal, Laggan Locks to Loch Oich is a section of Scotland's most ambitious early nineteenth-century engineering project, connecting the North Sea to the Atlantic via the Great Glen. It is designated a Scheduled Ancient Monument by Historic Environment Scotland under reference SM6494.
Caledonian Canal,Laggan Locks to Loch Oich is a Scheduled Ancient Monument, legally protected by Historic Environment Scotland — the body responsible for designating and safeguarding heritage sites in Scotland. The official designation reference is SM6494.
Several scheduled monuments lie within 10 km, including Caledonian Canal,Laggan Locks (1.9 km), Invergarry Castle (3.4 km), Caledonian Canal,Loch Oich to Cullochy Lock (7.2 km).
This page is just one thread. A full Aubrey report pulls together 14 strands of Caledonian Canal,Laggan Locks to Loch Oich's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Caledonian Canal,Laggan Locks to Loch Oich stands on Fault Zone Rocks, Unassigned, bedrock that formed in the Age unknown. The rock here is mylonitic-rock and fault-breccia.