Chenani-Nashri tunnel is India's longest, and safest

On the difficulties faced while executing the project, Chandwar said the tunnel has an "over burden" of 1,100 metres which means over the tunnel there was a mountain of 1,100 metres, and in such a situation when the mountains are dug there is a immense pressure from both sides of the mountain, creating difficulties in construction. "We also faced severe difficulties in taking the construction material inside and taking out the excavated material, as there were only two ways to enter the tunnel. The third challenge was to maintain the ventilation system for the workers inside as they should get enough oxygen. We were compelled to install ventilation ducts and fans," said Chandwar.