Twin Tube Tunnel between Thane and Borivali

Overview

Thane-Borivali Double Tunnel Project

Project information

The Thane-Borivali Double Tunnel Project is being implemented by the Mumbai Metropolitan Region Development Authority (MMRDA) . The project includes construction of double tunnels under the Sanjay Gandhi National Park and access roads connecting the Western Express Highway from Borivali and Ghodbunder Road from Thane.

Administrative Approval Date: 10 March 2023
Cost of administrative approval: ₹16,600.40 crore
Total project cost (including IDC charges): ₹18,838 crore
Work Start Date: May 19, 2023
Project duration: 60 months (expected completion by May 2028)

Currently, the 23 km journey between Thane and Borivali takes 1 to 1.5 hours. After the project is completed, the same journey will be completed in just 15 minutes.

Project details

Total Length: 11.84 Km
Tunnel length: 10.25 km
Connecting roads: 1.59 km
Length division:
- Along Borivali: 5.75 km
- Thane side: 6.09 km

Each tunnel will have 2 traffic lanes and 1 emergency lane. There will be cross-passages at every 300 meters. From a safety point of view, the following facilities will be provided:

Ventilation system
Firefighting equipment
Smoke detector devices
Retro-reflective / LED information board

Construction and Technology

This project is divided into 3 packages:
- 2 Civil Packages - Ongoing
- 1 MEP Package (Air Conditioning, Security System, etc.) - Starting Soon
Contractor: M/s Megha Engineering and Infrastructure Limited
Consultant: M/s. Hill–TCE Joint Venture (JV)

Since Sanjay Gandhi National Park is a sensitive area, tunnels are being dug using Tunnel Boring Machines (TBMs) in an environmentally friendly manner.