Thane Borivali Tunnel Status October 2026: Two TBMs Now Boring

The Thane Borivali tunnel status has changed more in the last 90 days than in the whole of the previous year. In July 2026, MMRDA put physical progress on the 11.84 km twin tunnel at 13.13%, with one boring machine underground. By October 2026 a second machine, Arjuna, has joined it under Sanjay Gandhi National Park, which doubles the active excavation faces on the Thane side. The Borivali end, meanwhile, is still stuck on a small but stubborn land issue at Magathane.

For buyers tracking homes in Manpada, Ghodbunder Road, Borivali East and Kandivali East, these quarterly shifts matter. Each one nudges the realistic opening date, and with it the timing of the price premium near both portals. We at Godrej Properties MMR have pulled together what has actually happened since July, what the numbers imply, and what to watch before the end of 2026. For the full history from groundbreaking onward, see our Thane Borivali tunnel status milestone tracker. This post covers only the latest quarter.

Three developments define the July-October 2026 period. First, the second TBM went live. Second, the Thane-end operation moved from a single-machine test phase to a twin-drive production phase. Third, the Borivali end still has not started boring, because the launch shaft at Magathane needs the final families relocated.

Arjuna was launched on 13 August 2026. Maharashtra Chief Minister Devendra Fadnavis started it remotely. Like Nayak, it carries a cutter head of roughly 13.2-13.34 metres, which makes these the largest-diameter single-shield hard-rock TBMs used in India. Both are cutting through basalt about 23 metres below the forest floor.

The physical-progress percentage is the one figure that lags. MMRDA has not published a revised number since July, so we will not guess one. What we can say is that the shift to two active machines matters more than any single percentage point.

Neither MMRDA nor the contractor, Megha Engineering & Infrastructures Ltd (MEIL), has released a cumulative metres-bored figure for October. We can still estimate a range from published design rates. The TBMs are planned to average about 11 metres per day. Nayak and Arjuna each have roughly 6.09 km to cover from the Thane end. TBMs 3 and 4 will each cover about 5.75 km from the Borivali end.

At a design rate of 11 metres per day, each Thane-end machine needs roughly 550 working days for its 6.09 km drive. Nayak would finish around late 2027 and Arjuna in early 2028, if both hold the design rate.

Real-world advance is rarely that steady. Early months on any TBM drive are slower while crews tune the machine, and the first stretch under the park includes the transition from soft ground at the portal into hard basalt. Our working estimate is that Nayak had bored somewhere between 1 and 1.8 km by early October 2026 [VERIFY: estimate based on design rate, not an official figure]. Arjuna, at under two months in, would be in the low hundreds of metres.

The key point for buyers: the Thane-end drives alone cannot open the tunnel. The geometry splits the bore roughly in half. The Borivali machines have to start within the next few months for the 2028 target to stay credible.

If you want one indicator to watch through the rest of 2026, it is the Magathane launch shaft. Reports from August 2026 put the number of project-affected families at the Borivali launch site at around 300. Most have already moved to Slum Rehabilitation Authority and MHADA housing, but 15-20 families had not yet been shifted. Earlier, MMRDA allotted 343 tenements for Magathane households: 290 at Ganesh Nagar in Kandivali West, 29 at Babhrekar Nagar in Malad West and 24 near Gaondevi in Dahisar West. More than 500 structures had been cleared by February 2026.

Until the last plot is vacant, the Borivali launch shaft cannot be fully excavated, and TBMs 3 and 4 cannot be lowered. Piling at the shaft and the casting yard have started. Our thane borivali tunnel map shows exactly where this shaft sits, beside the Western Express Highway near the Borivali BEST depot.

For a closer look at the land, clearance and rehabilitation risks behind this delay, read our companion piece on the thane borivali tunnel current status today and what homebuyers should do now.

Here are the signals our team will track each month. Any one of them moving would materially change the completion outlook:

• A fresh MMRDA physical-progress figure. Anything below roughly 20% by early 2027 would point to slippage beyond May 2028.
• Confirmation that Magathane is fully vacated. This is the single gating item for the Borivali half of the bore.
• TBM 3 and TBM 4 arrival and assembly at Borivali. Assembly typically runs a few months before launch, based on how Nayak and Arjuna progressed.
• Monthly advance rates for Nayak and Arjuna. Sustained rates near 11 m/day keep the Thane half on schedule.
• Geology updates under the park. Fault zones or water ingress in the basalt are the main technical risks.
• Monsoon impact on portal works. Approach-road and portal construction slow sharply from June to September.

On balance, we read October 2026 as cautiously positive. Two machines are in production, and the remaining land issue involves a small number of households, not a structural legal dispute. Our analysis of the thane borivali tunnel project completion date still places a realistic opening in the second half of 2028 to 2029.

Tunnel news moves sentiment before it moves prices. Ghodbunder Road has already logged 15-22% appreciation in about 24 months, and estimates for the 2-3 km band around each portal suggest a further 15-25% premium by completion. The second TBM launch reinforces that story on the Thane side, where the visible work is happening.

On the Mumbai side, Kandivali East averaged about Rs 30,950 per sq ft in September 2026. Prices there are driven more by Metro Line 7 and the Western Express Highway than by tunnel news, so they are less sensitive to quarterly updates.

Godrej Properties Limited has projects at both ends of the corridor. In Kandivali East, godrej reserve kandivali sits about 10 minutes from the Magathane portal. On the Thane side, an upcoming Ghodbunder Road township lies roughly five minutes from Tikuji-ni-Wadi. If you are comparing projects across the corridor, our new projects near Thane Borivali tunnel shortlist puts the options side by side. For an honest take on the most affordable Godrej option at the Borivali end, read our godrej bliss kandivali reviews.

Q: What is the Thane Borivali tunnel status in October 2026?

Two TBMs, Nayak and Arjuna, are excavating from the Thane end. Nayak has been running since April 2026 and Arjuna since August 2026. The Borivali end has not started boring, pending relocation of the last 15-20 families at Magathane. The official completion target is still May 2028.

Q: How many tunnel boring machines will the project use?

Four. Nayak and Arjuna bore roughly 6.09 km each from Thane. TBMs 3 and 4 will bore about 5.75 km each from Borivali once the Magathane launch shaft is ready.

Q: How much of the tunnel has been completed?

The last official figure was 13.13% physical progress in July 2026. MMRDA has not yet published an updated figure. Based on the 11 m/day design rate, we estimate Nayak’s drive at roughly 1-1.8 km so far, but this is not official.

Q: Who is building the Thane Borivali tunnel?

MMRDA is the implementing authority. Megha Engineering & Infrastructures Ltd (MEIL) is the contractor. The project cost is widely reported at about Rs 14,401 crore for the tunnel package.

Q: Will the tunnel open in May 2028?

That is the official target. Given the Borivali-end delay, we see the second half of 2028 to 2029 as the more realistic window. Independent analysts have also flagged possible slippage into 2029 because of monsoon and geology risks.

Q: How long will the drive from Thane to Borivali take once it opens?

About 15 minutes, compared with 60-90 minutes on Ghodbunder Road at peak. MMRDA projects around 80,000 vehicles a day using the tunnel by 2029.

The October 2026 picture is clear. The Thane half of the tunnel is now in full production with two machines, while the Borivali half waits on a final, small rehabilitation step at Magathane. That makes Magathane the date to watch, not the headline percentage.

If you are planning a purchase around the corridor, time your possession to a 2028-2029 opening and compare projects on actual drive time to the portals. Our team can walk you through current inventory at both ends and arrange a site visit.