On 1 December 2011, a new landslide occurred along the A83 Rest and Be Thankful pass (Argyll and Bute, Scotland) that blocked the road. The road was subsequently closed in both directions, resulting in a 26-mile diversion. The landslide occurred after 65.8 mm of rain — a quarter of the expected average for the area in December — fell in 48 hours.
Following the landslide, the road was fully closed for two days and was then only open during daylight hours for safety reasons from 3 December. The road was fully reopened at 08.30 hours on 13 December.
The BGS Landslide Response Team made a visit to the landslide on 2 December 2011 to investigate the failure. Information collected from this survey is logged in the BGS National Landslide Database ID 18264/1.
A further, smaller landslide (30–50 tonnes) occurred on 22 February 2012, setting off tiltmeter alarms. Although no debris from the landslide reached the road, the A83 was closed for two days as a precaution.
The 2011 landslide was widely reported in the local and national news.
- Slip could close A83 Rest and Be Thankful for 24 hours 1 December 2011, BBC News
- A83 Rest and Be Thankful road closed again at night 13 December 2011, BBC News
The geology of the site is described on the 2009 landslide page.
The landslide was a translational slide that degraded into a flow as it passed over a local break of slope, moving approximately 100 tonnes of material. In the lower section of the slope it has exploited a small gully.
This new landslide is approximately 370 m south-east of the 2007 and 2009 landslides, which exploited a much larger drainage channel. As with those landslides, this appears to be part of much older landslide features, with numerous tension cracks visible in the slope around the 2011 event.