Zojila Marvel: How Engineers Built A 13-KM Tunnel At 11,500 Feet And What It Means For The Army

Published 9 June 2026 · india

Zojila Marvel: How Engineers Built A 13-KM Tunnel At 11,500 Feet And What It Means For The Army Published By, Last Updated: June 09, 2026

Zojila Marvel: How Engineers Built A 13-KM Tunnel At 11,500 Feet And What It Means For The Army Published By, Last Updated: June 09, 2026, 16:05 IST The project's centrepiece is a 13.153-kilometre single-tube, two-lane tunnel running beneath the Zojila Pass between Baltal in Kashmir and Minamarg on the Ladakh side Rapid Read Union Minister Nitin Gadkari triggered the breakthrough blast at the strategic Zojila Tunnel on June 9, linking J&K with Ladakh. On June 9, engineers achieved the final breakthrough of the Zojila Tunnel, connecting the two ends of what is set to become India’s longest road tunnel and the world’s longest bi-directional road tunnel at such a high altitude. The final blast of the tunnel may appear to be another infrastructure milestone, but in reality it marks the culmination of one of the most strategically significant engineering projects undertaken in independent India. For tourists, the tunnel will mean a faster and safer journey to Ladakh. For the Indian Army, it could fundamentally alter the logistics of defending one of the country’s most sensitive frontiers. The Zojila Pass sits at around 11,500 feet above sea level on the Srinagar-Leh highway. It is the gateway between the Kashmir Valley and Ladakh. Every winter, heavy snowfall, blizzards, avalanches and landslides shut the pass for months, cutting off Ladakh from the rest of India. For civilians, this means delayed supplies, disrupted transport and isolation. For the military, it creates a far more serious challenge. Ladakh hosts some of India’s most sensitive military deployments facing both Pakistan and China. Every winter closure complicates the movement of troops, equipment, fuel, ammunition and heavy military platforms. This is why defence planners have long viewed Zojila not merely as a road project but as a strategic necessity. What Zojila Tunnel Is All About: The Features The project’s centrepiece is a 13.153-kilometre single-tube, two-lane tunnel running beneath the Zojila Pass between Baltal in Kashmir and Minamarg on the Ladakh side.

The tunnel sits at an altitude of approximately 11,578 feet. But the tunnel itself is only part of the project. The entire package includes a 13.15-km main tunnel, four bridges with a combined length of about 910 metres, additional Nilgrar tunnels, eight cut-and-cover tunnel sections spanning about 2.35 km, and three massive ventilation shafts reaching depths of approximately 480 metres, 385 metres and 213.5 metres respectively. The tunnel has been designed as a horseshoe-shaped structure approximately 7.57 metres high and capable of supporting two-way traffic throughout the year. The project’s cost estimates have evolved over time as designs changed and inflation increased. Current estimates place the cost at over Rs 4,600 crore. The idea is older than many people realise. Government discussions around an all-weather route through Zojila began in the mid-2000s. The project received approvals years later, with the foundation stone laid in 2018. However, financial troubles at the original contractor and redesigns delayed progress. The contract was eventually re-awarded to Megha Engineering & Infrastructure Limited (MEIL) in 2020. Major construction commenced in 2021. The delay illustrates a reality of Himalayan infrastructure: building a tunnel is difficult; building one under Zojila is another challenge altogether. Digging Through One Of The World’s Toughest Mountain Ranges The Himalayas are young mountains in geological terms. That sounds harmless until engineers begin drilling into them. Young mountains are unstable. Rocks fracture easily. Water seeps unpredictably. Underground pressure changes constantly. Entire sections can become unstable without warning. Engineers had to deal with fragile geology, water ingress, avalanche-prone terrain, extreme cold, seismic Zone IV conditions, and high-altitude health risks for workers. Winter temperatures often plunge to minus 18 degrees Celsius, while snow accumulation and avalanches can disrupt work for weeks. Unlike urban tunnels, workers here were operating in thin air with significantly lower oxygen levels. Even routine tasks become harder. Machinery loses efficiency. Concrete curing becomes more complicated. Human endurance declines. Every metre excavated requires extraordinary planning.