The C115 road near Pencombe has been shut indefinitely by Herefordshire Council following fears that excess rain may cause further landslides.
The road runs through a known historic landslide, which last moved in 1947. The route is currently affected by damage resulting from a 3km2 slide that reactivated in January, caused by to a prolonged period of wet weather, and the council is concerned continuing rainfall could aggravate the situation.
The British Geological Survey (BGS) landslides team visited the affected area in April and concluded that the failure was a reactivation of the historic landslide as a shallow translation with flow features at the toe.
BGS engineering geologist Catherine Pennington said: “The kind of landslide seen at Pencombe, while rare in the local area, has reactivated several times in living memory and may move again should there be long periods of heavy rainfall such as that seen over the last winter.”
Parsons Brinckerhoff has been carrying out a more in-depth investigation of the failure for Herefordshire Council and is expected to report on the options for the route in September.