The affected failed slope is lithologically weak which comprises of weathered sandstone, shale and carbonaceous shale of Renji Formation. The affected site was initially a subsidence area that stretches for about 200m along the road section which is part
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 2016-36
Detailed landslide investigation should be carried out along this road section to work out long term protection measures. Reactivated on 20/08/2016
Heuwangberam subsidence zone-1
NH 54, Heuwangberam
Control measures to prevent seepage of water into the sub-surface through piping, percolation (sealing of surface cracks with impervious material) and prevention of further movement by a toe retaining wall below the road may be considered. The slope lowe
The road was constructed on terrain dominated with intercalation of sandstone and carbonaceous shale. Shale on weathering transforms into a clay- rich soil which normally has very low shear strength especially when wet.