Patel’s Terratec TBM T83 in Mumbai Tunnels 653m in January

Remember Soma’s TBM T87 working in Mumbai that bored 526m in December 2021? Its sister machine TBM T83 deployed by Patel Engineering just bored 653m in January 2022.

This impressive feat by the 3.2 m diameter Terratec Open Rock TBM was recorded for the Municipal Corporation of Greater Mumbai (MCGM)’s 5.35 km Amar Mahal-II project to cater to the steadily growing water demands of eastern Mumbai.

Prior to commissioning inside Amar Mahal cavern

Patel Engineering’s TBM T-83 passed factory acceptance tests in September 2020, and was commissioned in March 2021 from Amar Mahal (Hedgewar Udyan) towards Trombay Low-Level Reservoir – a distance of roughly 3.5 kms. After its breakthrough in the coming months, it will excavate a further 2 kms to Trombay High-Level Reservoir (THLR) at depths ranging between 80 to 90m.

AMT Project’s Map (view large); AMT-II’s alignment in red can be seen jutting upwards (westward)

Patel’s team has so far excavated 3.1 km out of 3.5 km, and the first breakthrough at Trombay Low-Level Reservoir (TLLR) is expected to take place in March 2022.

Patel Engineering’s team

A major challenge of AMT-II was to assemble the TBM at a depth of approximately 100m inside the Amar Mahal job site’s tail tunnel where space was extremely tight. 

Amar Mahal (Hedgewar Udyan) to Trombay Low-Level Reservoir tunnel

This project is one of the many projects quietly being executed by the Municipal Corporation of Greater Mumbai (MCGM) to augment water sources, improve distribution system and manage water demand & supply.

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written by

Global traveler who prefers mass rapid transit

6 Responses to "Patel’s Terratec TBM T83 in Mumbai Tunnels 653m in January"

  1. Clevin Gomes says:

    Why Hyundai Rotem doesnt showed in this Bidding or with BEML. Is DMRC still put Hyundai Rotem in Blacklist?
    And for JSC Metrowagonmash it might be Tricky. Even though they will find out as Lowest Bidder by chance. It might be difficult for DMRC to award them due to ongoing Situation Between Russia and Ukraine. What’s your Opinion TMRG, it will be safe if DMRC award the contract to JSC?

  2. Rupraj Sengupta says:


  3. Hari Puttar says:

    Hello TMRG
    I have a news for you
    I can see a piling rig piling where the station is to be built .
    I am not sure but the construction of stations has started in Indore

    • TMRG says:

      Thanks for sharing. Geotechnical work is underway for station work. In fact coming to a close. Multiple contractors working on it.

  4. Vikram Sharma says:

    Kanpur Metro UG package KNPCC 06 will be awarded to Gulermak.


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