Over saturation of the insitu soil layer caused high porewater pressure which resulted in failure of the insitu soil hanging above the retaining wall.
Tep, Y. and Kumar, A. (2018); MacroScale (1:50,000) Landslide Susceptibility Mapping in Toposheet nos. 83C/16 and 83H/1 in  Dima Hasao and Cachar districts in Asam and East Jaintia hills  District in  Meghalaya and West and Central MNipur district in MNi
The NH53 passing through the hill section after crossing Lakhipur plains is characterized by extensive slope at several stretches. Due to the weak rock units (Siltstone, shale) the slope should be protected by adequate retaining walls.
Lowajuri
NH53
The height of the existing RCC retaining wall should be raised with sufficient weep holes.Easing of the slope above the retaining wall. Construction and proper maintenance of concrete road side drain.
Oversaturation of slope forming material and increase in local pore water pressure during torrential rainfall.Anthropogenic activities (unplanned cutting of slope)