Infrastructure – Zojila Tunnel Nears Major Milestone With Final Breakthrough Blast
Infrastructure – India is set to witness a significant achievement in its infrastructure sector as the long-awaited Zojila Tunnel reaches a crucial stage of construction. Union Minister for Road Transport and Highways Nitin Gadkari is expected to initiate the final breakthrough blast on Tuesday, marking the completion of a key excavation phase of the project.
The 13.15-kilometre tunnel, being developed beneath the Zojila Pass at an altitude of around 11,500 feet, is designed to provide uninterrupted road access between Ladakh and the rest of the country throughout the year. The project is regarded as one of the most challenging engineering efforts undertaken in the Himalayan region.
Landmark Progress in Construction
The tunnel contract was awarded to Hyderabad-based Megha Engineering and Infrastructures Limited (MEIL) in October 2020, while on-site construction activities began in April 2021. To speed up progress, excavation work was carried out simultaneously from the Baltal side in Kashmir and the Minamarg side in Ladakh.
Officials said the final breakthrough blast will connect the excavation fronts from both ends, representing a major construction milestone. Following the event, authorities may allow a limited number of vehicles to pass through the tunnel as a symbolic demonstration.
Challenging Himalayan Conditions
Building the tunnel has required engineers and workers to overcome extreme environmental and geological obstacles. The project site has faced unstable rock formations, water seepage, avalanche-prone zones, and severe winter conditions.
Construction teams have continued operations despite temperatures ranging from minus 20 degrees Celsius to 30 degrees Celsius during different seasons. Around 1,200 personnel, including engineers, technicians, mechanics, and labourers, are currently involved in the project.
Engineering Design and Safety Measures
The tunnel is being built at an estimated cost of ₹2,600 crore. It features a horseshoe-shaped design, stands 7.57 metres high, and will support two-lane traffic beneath the Himalayan mountain range connecting Ganderbal in Kashmir with Drass in Ladakh.
Engineers have adopted the New Austrian Tunnelling Method (NATM), a construction approach suited for regions with complex geological conditions. The method involves phased excavation, continuous monitoring, and immediate reinforcement through techniques such as rock bolting and shotcrete application.
Project officials stated that international safety standards have been incorporated throughout construction. Despite difficult terrain and geological uncertainties, strict monitoring systems have been maintained to minimise risks and ensure worker safety.
Protection Against Harsh Weather
To ensure year-round operations, several protective structures are being developed along the route. These include snow safety installations, reinforced walls, and cut-and-cover sections designed to shield the corridor from avalanches and severe winter weather.
Officials said these measures are intended to keep transport links functional even during periods of heavy snowfall, helping maintain reliable access between Ladakh and other parts of India.
Additional Infrastructure Components
Apart from the main tunnel, the project also includes highway connectivity works, bridges, protective structures, snow-control systems, and the Nilgrar twin tunnels. With excavation nearing completion, attention will now shift toward concrete lining, tunnel finishing works, and the installation of advanced ventilation systems.
Once operational, the tunnel will include a dedicated 1.5-metre-wide pathway for maintenance and emergency personnel. Emergency lay-bys have been incorporated at intervals of 750 metres, allowing vehicles to move aside during breakdowns or other incidents.
Modern fire detection and suppression systems will also be installed throughout the tunnel. In addition, a six-kilometre-long snow protection network featuring catch dams, protection walls, air-blast structures, and deflector systems is being developed to reduce weather-related risks.
Economic and Strategic Importance
The overall project is targeted for completion by February 2028. Upon opening, the tunnel is expected to reduce travel time between Srinagar and Leh by nearly three and a half hours.
Improved connectivity is likely to support tourism, strengthen supply chains, facilitate movement of essential goods, and provide significant benefits to local communities. The project also carries strategic importance by enabling faster and more reliable transportation of defence personnel, equipment, and supplies to Ladakh, a region bordering both Pakistan and China.