11 April 2021
Culluchaca: a large landslide on 7 April 2021 in Peru
On 7 April 2021 a large failure occurred close to the village of Culluchaca in Huari province of the Áncash region of Peru. The landslide did not claim any lives but caused serious damage to about 1 km of National Road 14a:-
The location of the landslide appears to be -9.301534° -77.008174°. This is a Google Earth oblique view of the site:
The image shows an existing large failure at this site. Note also the very clear tension cracks located above the existing crest of the landslide. I suspect that a large block delineated by these cracks has failed. The image below shows the aftermath of the landslide:-
Note the very extensive scale of the landslide in the image above. It is clear that a large volume has failed.
According to a news report in Áncash Noticias (in Spanish), the population of the village of Culluchaca have had to be evacuated because of the risk. In addition the landslide has disrupted the electricity network supply the districts of Huacachi, Anra, Uco, Rapayán, Paucas and Huacchis in the province of Huari, and some parts of the province of Antonio Raimondi and Huamalies.
Clearly reinstatement of the road will be important, but this will not be possible until the landslide has stabilised again. It will not be a straightforward problem to solve. Fortunately the images above suggest that the river is probably not blocked by the landslide, at present at least.