Overview
- The breakthrough is scheduled at Shaft-4 in Wahal village under Water Tunnel Package-1.
- Afcons Infrastructure is executing an 8.7 km treated-water tunnel in Package-1, with 5.52 km completed to date.
- The full scheme comprises a 13.25 km raw-water tunnel and a 15.4 km treated-water tunnel to serve Navi Mumbai’s growing demand.
- Tunnelling runs at roughly 100 metres depth through Deccan Sahyadri basalt, with tight sites and demanding muck removal cited as key challenges.
- Afcons reported a national monthly record of 777 metres using the 3.2 m TBM “Flamingo,” reflecting sustained progress on the drive.