Due to heavy rainfall in the area, slope wash and slope debris material accumulated on the road. Flash flood occurred in the Alaknanda River due to cloudburst in the catchment which eroded both the banks and toe of the slide along left bank.

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_ 033
Near Maithana Village
Diversion of surface run off,  boulder crate wall with deflection spurs, concrete retaining wall and breast wall with weep holes.
Unpreceedented rainfall and cloudburst caused flood in Alaknanda River, causing toe and bank erosion and saturation of the slope debris.