Probe finds multiple reasons for tunnel collapse at Silkyara

The preliminary probe report on the recent Silkyara tunnel collapse in Uttarkashi has found multiple reasons for the accident, including wrong alignment of the project with it being along the 'shear zone' and the contractor carrying out 're-profiling' work without taking adequate safeguards despite knowing vulnerabilities of the stretch going by past records of cavities (collapses). The report has also mentioned how the contractor had not got approval of the methodology for carrying out the work by the authority engineer appointed by NHIDCL.