State / JVUrban MetroPartly OperationalDelayed
Mumbai Metro Line 3 / Aqua Line
A 33.5 km fully underground metro corridor from Colaba to Bandra-Kurla Complex and SEEPZ, also known as the Aqua Line.
Estimated cost
₹37,276 cr
Reported spend
Not available
Announced
27 Jun 2013
Last verified
1 May 2026
Schedule check
Compared with the first announced target
The underground corridor opened in phases after depot, tunnelling, land and environmental delays pushed the full corridor beyond earlier targets.
First target
Dec 2021
Current target
Dec 2025
Revised target
Not listed
Public relevance
Mumbai commuters across Colaba, BKC, airport and SEEPZ corridors, with interchange benefits across suburban and metro networks.
Timeline
2 events
1 Oct 2016
Civil works advanced
Main underground civil packages moved into execution.
7 Oct 2024
First phase opened
The Aarey-JVLR to BKC stretch opened for public service.
Risk notes
- Balance underground commissioning and station integration
- Depot, systems and passenger ramp-up risks
Official/public sources
Use these links to inspect the underlying public sources for project details and updates.