Debris slide  occurred at the side of Munnar- Silent valley Road. In which tea plantation of Grahamsland estate as well as the road washed out. Slope modification for plantation and road are main causes.  Absence of roadside drains resulted in surface ru
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Grahamsland Estate, KDH Village,Devikulam
Munnar- Silent valley Road
Retaining wall  with weep holes and suitable filter medium founded on the hard rock should be provided along the cutslope. Surface runoff should be diverted away from the road by providing lined drains.
Unscientific hill slope modification for road construction that left cut slope with no lateral support. Absence of roadside drains resulted in surface runoff eroding the filled slope and subsequent failure. Excess rain resulted in reduction of strength o