Date: 2026-06-02Category: Press ReleaseState: Union GovernmentCountry: India
Third Mountain Tunnel Breakthrough Achieved in Maharashtra for Mumbai–Ahmedabad Bullet Train Project, Marking Rapid Progress in High-speed Rail Section
**Executive Summary**
The Ministry of Railways announced the successful breakthrough of mountain tunnel MT-07 on June 2, 2026, marking a significant milestone for the Mumbai–Ahmedabad Bullet Train Project. This 417-metre tunnel in Maharashtra’s Palghar district is the third breakthrough achieved in the state within five months. The achievement signifies rapid progress in the high-speed rail corridor's most technically challenging sections, utilizing advanced monitoring and safety systems.
**Key Points / Main Content**
**Tunnel MT-07 Specifications and Construction**
* **Dimensions:** The tunnel spans 417 metres in length and 14.4 metres in width.
* **Capacity:** Designed to accommodate both the "up" and "down" tracks for the Bullet Train corridor.
* **Methodology:** Excavation was completed using a controlled drilling and blasting method from both ends.
**Safety and Monitoring Systems**
* **Real-time Monitoring:** Deployed Surface Settlement Points (SSP), 3D targets, strain gauges, and seismographs to monitor vibrations and structural behavior.
* **Worker Safety:** Implemented comprehensive measures including ventilation systems, fire-safety arrangements, and controlled access.
* **Supervision:** Continuous geotechnical supervision and sophisticated instrumentation ensured structural stability and precision during execution.
**Project Progress and Milestones**
* **Maharashtra Section:** Three breakthroughs (MT-05, MT-06, and MT-07) have been completed in the last five months.
* **Earlier Successes:** MT-05 (1.5 km) was achieved on January 2, 2026; MT-06 (454 metres) was completed on February 3, 2026, using the New Austrian Tunnelling Method (NATM).
* **Overall Status:** Of the eight total mountain tunnels, MT-08 (Gujarat) is complete, while MT-03 has exceeded 80% excavation and MT-04 has reached nearly 60% progress.
* **Regional Completion:** All mountain tunnels between Vapi and Boisar stations have now been successfully excavated.
**Impact Analysis**
**Ministry of Railways and Project Developers**
**Impact**
The successful breakthrough strengthens India’s capabilities in high-speed rail infrastructure and maintains the project's momentum in technically demanding regions.
**Action Required**
Continue steady progression on remaining tunnels (MT-01 and MT-02) and finalize excavation for MT-03 and MT-04 to meet project timelines.
**Project Engineers and Construction Workers**
**Impact**
Personnel are supported by high-level safety protocols and advanced engineering tools, reducing risks associated with mountain tunneling.
**Action Required**
Must adhere to continuous geotechnical supervision and maintain real-time monitoring of vibrations and surrounding structures during the remaining excavation phases.
**Regional Stakeholders (Palghar and Valsad Districts)**
**Impact**
The completion of tunnels in these areas brings the high-speed rail corridor closer to operational status, eventually impacting local mobility and industrial connectivity between Boisar and Vapi.
**Action Required**
No specific action is required from this group based on the document, other than noting the progress of infrastructure development in their respective districts.
Key Entities Referenced
Mumbai–Ahmedabad Bullet Train Project: India’s first high-speed rail corridor initiative aimed at connecting major economic hubs between Maharashtra and Gujarat.
Ministry of Railways: The primary Union Ministry responsible for the overall planning, execution, and monitoring of the high-speed rail infrastructure.
Ashwini Vaishnaw: The Union Minister for Railways who provides high-level oversight and leadership for the bullet train project's development.
Palghar district, Maharashtra: The central geographical location where significant engineering milestones, including multiple mountain tunnel breakthroughs, are concentrated.
New Austrian Tunnelling Method (NATM): A specialized modern engineering methodology referenced for the excavation of technically challenging tunnel sections within the project.
Ministry of Railways
Third Mountain Tunnel Breakthrough Achieved in
Maharashtra for Mumbai–Ahmedabad Bullet
Train Project, Marking Rapid Progress in High-
speed Rail Section
Mountain Tunnel (MT-07) Spans 417 Metres in Length and
14.4 Metres in Width, Built with Advanced Monitoring and
Safety Systems to Support High-Speed Bullet Train
Operations
Three Mountain Tunnel Breakthroughs Achieved in Just Five
Months in Palghar District Strengthening Momentum of
India’s First Bullet Train Project
Posted On: 02 JUN 2026 3:58PM by PIB Delhi
A major engineering milestone has been achieved in the Mumbai–Ahmedabad Bullet Train Project with the successful
breakthrough of the third mountain tunnel (MT-07) at Ambesari village in Dahanu Taluka of Palghar district, Maharashtra.
Mumbai-Amdavad Bullet Train Project achieves another milestone 🇮🇳
🛤 3rd mountain tunnel breakthrough in Maharashtra within 5 months.
📍Dahanu Taluka, Palghar pic.twitter.com/vhZcU4vgmP
— Ashwini Vaishnaw (@AshwiniVaishnaw) June 2, 2026With this achievement, three mountain tunnel breakthroughs have now been completed in Maharashtra
within the last five months, reflecting rapid progress in one of the most technically challenging sections
of India’s first high-speed rail corridor.The newly completed MT-07 mountain tunnel is 417 metres long and 14.4 metres wide, designed to
accommodate both up and down tracks of the Bullet Train corridor. The tunnel was excavated through a
controlled drilling and blasting method from both ends, supported by advanced engineering and safety
protocols.
Throughout the excavation process, sophisticated monitoring systems and geotechnical instruments
were deployed to ensure structural stability, worker safety and precision execution. Real-time
monitoring arrangements including Surface Settlement Points (SSP), 3D targets, strain gauges and
seismographs continuously monitored vibrations, tunnel behaviour and surrounding structures.
Comprehensive worker-safety measures including ventilation systems, fire-safety arrangements,
controlled access and continuous geotechnical supervision were maintained during tunnelling
operations.
Earlier Tunnel Breakthroughs in Maharashtra
The latest breakthrough builds upon earlier milestones achieved in the Maharashtra section of the
project. The first mountain tunnel breakthrough (MT-05), spanning 1.5 km, was achieved near Saphale i
n Palghar district on 2 January 2026, marking the first successful mountain tunnel breakthrough for the
Bullet Train Project in Maharashtra. This was followed by the second breakthrough (MT-06) on 3 Febru
ary 2026, involving a 454-metre-long tunnel excavated using New Austrian Tunnelling Method
(NATM), resulting in two breakthroughs being achieved within about one month in Palghar district.Among the seven mountain tunnels under construction in Maharashtra, MT-05, MT-06 and MT-07 have
now achieved breakthroughs, MT-08 (350 metre) already achieved breakthrough on 5 October 2023,
MT-03 has crossed 80% excavation progress, MT-04 has reached nearly 60% progress, while MT-01
and MT-02 are progressing steadily. Of the total eight mountain tunnels in the Mumbai–Ahmedabad
Bullet Train Project, seven are located in Palghar district of Maharashtra and one in Valsad district of
Gujarat, where tunnelling work has already been completed.
All three mountain tunnels between Vapi and Boisar Bullet Train stations have been successfully
excavated. The Mumbai–Ahmedabad Bullet Train corridor passes through an important industrial
region between Boisar in Maharashtra and Vapi in Gujarat, where construction work is progressing
rapidly. The route between these two cities include three (03) mountain tunnels (MT 08, MT-07 & MT-
06).
The Mumbai–Ahmedabad Bullet Train Project continues to drive adoption of advanced tunnelling,
monitoring and construction technologies, strengthening India’s capabilities in high-speed rail
infrastructure and laying the foundation for safe, modern and future-ready rail mobility.
*****
Dharmendra Tewari/ Dr. Nayan Solanki/ Ritu Raj/ Manik Sharma
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