This landslide took place due to climatological factors. Rainwater seeped through the joints and pores which got dammed up later on causing this landslide. 

 A report on recent landslides in Thodupuzha, Udumbanchola and Devikulam taluks, Idukki district, Kerala by C. Muraleedharan, Geologist (Sr) and M. P. Muraleedharan, Director, Opn TNPK, Unit Kerala, Thiruvananthapuram (2007)

Edadumuttam 1st Landslide
Elappally village
Retaining wall with weep holes, surface drainage, redesigning of culverts along the road. Awareness campaign among the communities.
This landslide occurred on a slope comprising thin layer of humus underalain by lateritic soil and admixture of cobbles, pebbles etc. As a result of incessant rainfall water percolated through the thin soil cover as well as through highly jointed bedrock