From AT nala to Tapovan, sinking and subsidence recorded at number of places. Prima facie recharge of the area appears from the Auli top. Heavy rainfall in the area in June 2013 triggered the slide by saturation and reduction in shear strength parameters
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
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Kathadhar village near Tapovan.
Breast wall with weep holes and reverse filter along affected road length, lined toe drain, small check bunds along mud flow gullies, geo-membrane with mulchcing of suitable plants.
Heavy precipitation resulted in  reduction in shear strength of the slope mass.