The Dharasu slide of Uttarkashi was triggered due to heavy rainfall. Prolonged rain in the area and catchment increases discharge of Bhagirathi river resulting flash flood. Although in-situ rock is exposed at the river bed level but the high discharge of
Interim Report on Preliminary Slope Stability assessment of the recent disaster affected areas of Uttarkashi district, Uttarakhand by D.P.Dangwal, Sr.Geol., Neetu Chauhan, Mayukhee & T. Ghosh, Geologists, M-IV, NR, Dehradun, (LHZ/NR/UPUK/2013/053)
UK_UTT_NH134_ L39
NH-134, Dharasu slide
Construction of one row of crate wall in front of RCC wall with spars/ deflector to divert  the flow of water,  provision of  weep holes to release the pore water pressure
Thinly foliated/ puckered rock mass, Pore water pressure, reduction in shear strength