It is an old debris slide and translational movement of debris mass below the road was observed and in turn the road had sunk.  Heavy precipitation and continuous percolation of water caused saturation of debris mass and zone of weakness formed at the in
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_ 021
Proper filling and compaction of the road while rebuilding, breast wall along affected road length.
Heavy precipitation causing plane of weakness at the interface of in-situ rock and debries, saturation of slopes comprising soil and debris, road construction leading to overloading of the slope. 
