Due to poor slope forming material comprising of thick in-situ soil, Jhum cultivation, infiltration*
Tariq. Q. A., and  Kumar. A 2017, Macro-scale (1:50,000) Landslide Susceptibility Mapping in parts of Toposheets nos. 83C/14 & 83C/15 in Dima Hasao and  Karbi Anglong of Assam and Jaintia Hills district of Meghalaya. Unpub. GSI report of FS 2016-2017.
The Slide almost reached crown portion
Kobak
New Sangbar-Kobak Road
1. Depending on the contour of the existing slope, a variable excavation with a maximum of 1-1.5m depth may be made for founding the retaining wall, preferably on a rocky substratum.
Slope cut, poor slope forming material comprising of thick in-situ soil, infiltration of water due to incessant rainfall causing increase in pore water pressure of the overburden material.