The affected area is comprised of thick section of unconsolidated material. Extensive slope excavation on natural slope  are the major role in this slope failure. In addition development of pore water pressure increase the overburden weight.
Anicia K.S., Arvind Kumar Singh, 2022, Remote Sensing based Macro-scale (1:50,000) landslide susceptibility mapping in TS no. 82 P/12, 15, 16; 91 C/3, 4, 7, 8, 12; 91 D/1, 2, 3, 4, 5, 6, 8, 9 and 10 covering parts of Lower Dibang Valley, Lohit, Anjaw and
NIL
From Khupa/ KVK Anjaw 3 kms along HMH road towards Hunli
Hunli-Metengliang-Hayuliang (HMH) road
1. Provision of hill side road drains. 2. Removal of protruded rock fragments and loose material occurring at critical angle. 3. Trimming of crown scar and slope face. 4. Removal of unstable plantation from the crown.
The toe cutting of hillslope for road construction and prolonged infiltration of rain water along the loose debris reduce the  shear strength of the weak SFM.