At 20.00 hours that evening this landslide caused the derailment of a goods train on the Crianlarich to Fort William line, causing the engine to fall down the embankment towards the loch.
Earlier remedial work, immediately north of the landslide, took place in 2010 when rock armour was placed above the track to stabilise a retaining wall. This was not related to any landslide event.
The BGS has no record of earlier slope failure on the eastern shore of Loch Treig. Since the railway opened in 1894 there is no record of disruption and historic Ordnance Survey maps do not show any evidence for slope failure.
The landslide was reported to the BGS on Monday 2 July and a visit was arranged by Network Rail for BGS landslide specialists to examine the event on Monday 9 July. By this time, while the failure scarp and pathway could be examined, the landslide debris had been cleared from the trackway and the track sleepers and rails were being relaid. The line reopened on Wednesday 11 July.
The landslide was initiated by a shallow planar movement that developed into a debris flow. The landslide event is recorded as National Landslide Database ID NLD 18683/1.