Kolkata Metro’s tunnel boring machine ‘Durga’ has completed a crucial breakthrough at Victoria station, marking a major milestone in the construction of the Purple Line corridor.

‘Durga’ Completes Key Underground Stretch of Kolkata Metro

Kolkata Metro has achieved a significant milestone in the development of its Purple Line corridor after tunnel boring machine (TBM) ‘Durga’ successfully broke through at Victoria station. The breakthrough marks an important step towards the completion of one of the city’s most ambitious underground transport projects.

TBM Durga began its journey from Kidderpore on July 10, 2025, and has now completed excavation across a distance of nearly 1.7 kilometres, traversing one of Kolkata’s most technically demanding underground sections.

The achievement is expected to accelerate work on the Purple Line, which aims to improve connectivity across key parts of the city.

One Year of Excavation Through Challenging Terrain

The tunnel boring machine spent almost a year excavating the underground stretch between Kidderpore and Victoria station.

Engineers and project officials described the route as one of the most complex sections of the metro expansion because of Kolkata’s dense urban landscape, ageing infrastructure, and geological challenges. The successful breakthrough is being viewed as a major engineering accomplishment for the project team.

The completion of this phase brings the Purple Line a step closer to becoming operational.

Purple Line to Strengthen Kolkata’s Transport Network

The Purple Line is expected to play a crucial role in easing traffic congestion and enhancing public transport in Kolkata by linking important residential, commercial, and heritage areas.

Once completed, the corridor will provide commuters with faster and more efficient travel options while reducing pressure on the city’s road network. Metro officials believe the project will significantly improve connectivity across southern and central Kolkata.

The expansion is also expected to support economic activity and urban mobility in one of India’s busiest metropolitan regions.

Advanced Engineering Behind the Project

Tunnel boring machines such as Durga are designed to excavate underground passages while minimising disruption to roads, buildings, and other surface infrastructure.

The successful completion of the Kidderpore–Victoria stretch demonstrates the advanced engineering and planning involved in constructing metro networks beneath densely populated urban areas.

Large-scale infrastructure projects of this nature require careful coordination among engineers, geologists, and urban planners to ensure safety and efficiency throughout the construction process.

Major Boost for Kolkata’s Metro Expansion

The latest breakthrough adds momentum to Kolkata Metro’s ongoing expansion programme, which includes several new corridors aimed at improving urban transportation.

As construction progresses, officials expect the Purple Line to become an important component of the city’s transit system, offering commuters a reliable and sustainable alternative to road travel.

The project is part of broader efforts to modernise Kolkata’s public transport infrastructure and meet the mobility needs of its growing population.

Why This Matters

Metro expansion projects are critical for addressing traffic congestion, reducing travel times, and improving connectivity in large cities.

The completion of key tunnelling works not only represents an engineering achievement but also brings commuters closer to accessing faster and more efficient transportation options.

Conclusion

The breakthrough achieved by tunnel boring machine Durga at Victoria station marks a major milestone for Kolkata Metro’s Purple Line project. After travelling nearly 1.7 kilometres from Kidderpore over the course of a year, the machine has completed one of the city’s most challenging underground sections. The achievement is expected to accelerate construction and move the Purple Line closer to completion, strengthening Kolkata’s transport infrastructure in the years ahead.

Key Takeaways

• TBM Durga has broken through at Victoria station on Kolkata Metro’s Purple Line.
• The machine travelled nearly 1.7 kilometres from Kidderpore.
• Excavation began on July 10, 2025, and took almost a year to complete.
• The route was considered one of the project’s most technically challenging stretches.
• The Purple Line is expected to improve connectivity and ease traffic congestion in Kolkata.

FAQs

What milestone has Kolkata Metro achieved?
Tunnel boring machine Durga has successfully broken through at Victoria station.

How far did TBM Durga travel?
The machine excavated nearly 1.7 kilometres from Kidderpore to Victoria station.

When did the tunnelling work begin?
Excavation started on July 10, 2025.

Why is this section significant?
It is considered one of Kolkata’s most technically challenging underground stretches.

How will the Purple Line benefit commuters?
The line is expected to improve connectivity, reduce travel times, and ease traffic congestion across Kolkata.

Category: West Bengal | Infrastructure | Transport | Kolkata Metro