Vertical drilling
'This Is Uttarakhand Govt's Indolence And Negligence,' Congress Leader Yashpal Arya On Uttarkashi Tunnel Rescue Ops
No More GPR Survey At Uttarakhand Rescue Site, Team Sent Back To Delhi
Uttarkashi Tunnel Collapse: Up To 30 Metres Vertical Drilling Completed, Broken Parts Of Auger Machine Removed