Mumbai’s first underground metro tunnel breakthrough achieved on Line 7A (photos)

Uma Kadam / TNN / Updated: Apr 17, 2025, 14:48 IST
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Tunnel breakthrough
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Tunnel breakthrough

MMRDA completed the 1.647-km tunnel from Andheri East to CSMIA, marking its first underground metro breakthrough in Mumbai.

Easy transfers
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Easy transfers

The line will allow interchanges with Metro Lines 1, 6, and 9 for better connectivity across the city.

Powerful tunnel boring machine used
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Powerful tunnel boring machine used

The tunnel was bored using a dual-mode TBM built for hard rock, creating a 6.35-metre-wide underground route.

Fast progress
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Fast progress

Work began in Sept 2023 and continued smoothly despite tough conditions like steep gradients and shallow clearance.

Airport link
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Airport link

Line 7A will offer a direct metro link from Andheri East to CSMIA Terminal 2, easing airport travel.

CM Witnesses Moment
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CM Witnesses Moment

CM Devendra Fadnavis Dr. Sanjay Mukherjee, and other senior IAS officers were present to mark the milestone.

Over half done
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Over half done

59% of the project is complete, with coordinated efforts from MMRDA, BMC, AAI, and other agencies.

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