Heavy rainfall and flash flood in the Pinder river eroded the toe of the slide and damaged about 100 road length. Also, during road widening vulnerable discontinuity planes got daylighted causing 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_NH_ 054
Between Simli and Karnprayag
Concrete wall along river bank, filling of road with proper compaction, slope reduction by gabion or breast wall with weep holes and lined drainage.
Heavy rainfall in catchment of Pindar River caused flash flood and toe erosion triggering movement of debris. Heavy rainfall also saturated the terrace and colluvial material causing loss of shear atrength.