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Landslides in Wales

Landslides associated with heavy rainfall

1983 Snowdonia After intense rainfall 3 September there were many landslides, 2 blocked the A5 trunkroad at Nant Ffrancon, some ended near the HEP station at Cwm Dyli SE of Snowdon

Winter 2000-2001 Heavy rainfall triggered many landslides
Try This!
Find out about landslides in your area. Search the web.

Ask in your local library, council offices, newspaper.

www.bgs.ac.uk/britainbeneath/haz_landslides.html is a web site using GIS – Geographical Information Systems- where you can use digital maps to find out about landslides within Wales. A description is found in the 16-18 section. LINK TO LANDSLIDES 16-18
Date Location
Nov Horseshoe Pass, Llangollen
Dec St Asaph Ty’n-y-coed
Nov Trefnant, Wigfair Road
Nov Eglwyseg Mt., Llangollen, Panorama Walk
Dec Llangynog, S of Bala

1929 Rhigos Mountain Road, runs N from the Rhondda Valley to the Heads of the Valley road and links to Tower Colliery. It was opened Nov 1929, the wettest winter on record and closed by a landslide within one week. The road has constantly been affected by landslides and was closed for a period in 2000.

1930 Rhymney Valley, New Tredegar slide. The rainfall in Oct 1929 and Jan 1930 was over 180% higher than the average in the region, the highest rainfall in the 51 year record.

1954 Ebbw Fach Valley, Blaina, E Pentwyn Here a crack and scarp appeared after a dry period. Movement in the West Side landslide in 1999. 2.3 metres /year

1994 N Pembrokeshire,St Dogmaels. An old landslide was re-activated in Jan/Feb during a period of intense and prolonged rainfall.
            Related Sections:
Causes of landslides Case study : Nefyn Landslide hazards