Hyderabad, March 3 -- Even agencies involved in the rescue efforts at the Srisailam Left Bank Canal (SLBC) tunnel collapse incident near Domalapenta in Nagarkurnool district assured that it would be done; a a retired scientist from the Geological Survey of India (GSI) said that procedural challenges, coupled with the failure to locate the shear zones (weak spots), which are the fault-lines in the terrain where the tunnel was being built has caused the incident.

The scientist also pointed out that that until ten years ago, the GSI used to give technical appraisal for all such projects, which was then discontinued, as almost all the contracting firms were now having their own geological wings comprising experts.

Telangana chief minister A...