The affected failed slope comprises of highly weathered sandstone and carbonaceous shale. Due to incessant rainfall, weak slope forming material developed local hydrostatic pore and seepage of water along the weak planes contributed to slope failure.
Chasie M. &  Theophilus P.K., 2017: Updation of existing landslide inventory of North Eastern region based on the new incidences as and when occurs during the period, Unpubl. GSI progress report for FS 2016-64
Numerous small fresh landslide scars are seen along this Haflong – Gunjung road section road section. Landslide initiated on 22/05/2016
Haflong – Gunjung road section slide-02
Haflong – Gunjung road section
1. Construction of retaining wall at the toe portion of the slope with sufficient weep holes.
2. Easing of the slope by benching.
3. Channeling of surface run off away from the affected slope by channelizing the outlet water through lateral drain near th
Cutting of toe for road construction in natural slopes disturbed the angle of repose of the material, and heavy downpour resulted in over-saturation of slope forming material which in turn increased pore water pressure and reduced their shear strength.