The heavy rainfall and flash flood in the Pinder river eroded the toe of the old slide and damaged 100 m road length.

An Interim Report on Preliminary  Geological  Slope Stability Assessment of the Recent Disaster Affected Areas in Parts of Chamoli District, Uttarakhand by Bhupendra Singh, Bhupender Singh, Ajay Kumar and Arindam Roy, Senior Geologists, M-IV, NR GSI Dehr
UK_CHA_SH_ 047
Near Sunila village along Karnprayag-Gwaldam road.
Concrete retaining wall upto HFL, channelisation of surface run off, breast wall with weep holes.
Heavy rainfall in catchment of Pindar River caused flash flood and toe erosion triggering movement of debris. The fines in this old debries material were removed due to over saturation causing the loose material to flow downslope.