Thin terrace and colluvial material got saturated due to heavy rainfall in the Pinder Valley. The slope angle of the area is vertical at places. Due to over saturation the overburden material lost its c & Φ and resulted into slope failure.

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_ 053
Thapli village along State Highway
Channelisation of surface run off, concrete toe wall, road protection through breast wall with weep holes and lined drainage.
Slope material got saturated due to heavy rainfall and lost its c & Φ, the toe of the slide already exposed by road widening was further eroded by Pindar River.