Coal India and NHIDCL. Jain said that with fragile geology in the region, vertical drilling would be done extensively if other options failed.
Five government agencies have been asked to look at all options to reach and rescue trapped workers in the tunnel. National Highways and Infrastructure Development Corporation Limited (NHDCL), Oil and Natural Gas Corporation (ONGC), Satluj Jal Vidyut Nigam (SJVNL), Tehri Hydro Development Corporation Limited (THDC) and Rail Vikas Nigam Limited (RVNL) have been assigned one option each.Milestone Alert!
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