Soil Testing Begins for Mumbai Metro Red Line-7A’s Airport Extn

Workers from DBM Geotechnics & Constructions Pvt. Ltd. on a sub-contract from J Kumar Infraprojects have begun geo-technical soil investigation work for building Mumbai Metro Red Line’s 3.17 km mostly underground Line-7A to connect Andheri East with Chhatrapati Shivaji Maharaj International Airport (CSIA)’s Terminal 2.

Geotechnical investigation reports are usually made available to all interested infrastructure companies during the bidding stage by the operator, in this case by the Mumbai Metropolitan Region Development Authority (MMRDA), but contractors usually re-validate those findings prior to the start of construction to ensure the optimal design is selected for constructing the line’s foundation or substructure.

J Kumar is the civil contractor for this extension (package CA48), and was awarded a Rs. 1,998 Cr contract in September 2019. Their scope of work in this package, besides the 11.38 elevated Line-9 extension, includes building the line’s viaduct, ramp and underground tunnels (2.915 km) and 2 stations at Airport Colony and CSIA Terminal 2, where it’ll meet the under construction Line-3 (Aqua Line), and in the future, Line-8 (Gold Line).

Route Map of Mumbai Metro’s Red Line (L-7A) – view Mumbai Metro map & information
Soil investigation tripod spotted along the WEH – Photo Copyright: Akshay Marathe
More barricades – Photo Copyright: Akshay Marathe

For more updates, check out the Mumbai section of the Metro Rail Guy!


written by

Global traveler who prefers mass rapid transit

4 Responses to "Soil Testing Begins for Mumbai Metro Red Line-7A’s Airport Extn"

  1. Savio says:

    Why are they not connecting Sahar rd station with this line?

    • TMRG says:

      Most likely not worth the cost – looking at that station’s projected ridership on the Aqua Line and T2 station being next door?

  2. Clevin Gomes says:

    Which method will be use for making tunnels for underground section of a Red Line, is it TBM’s or Cut & Cover Method. I think they will make this section with TBM’s because it may be disruptive for the Airport to make C&C method.


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