MUMBAI: The BMC’s coastal road project, work on which will start this month, is expected to get two independent tunnels—one 20-25 metres below south Mumbai’s Girgaum Chowpathy area and the other 70-75m below Malabar Hill.
The 9.9km coastal road will link Marine Drive to the southern end of Bandra-Worli Sea Link (BWSL) and include a 6.8km undersea tunnel, which will run from Marine Lines near Princess Street flyover to Priyadarshini Park.
A civic official said the proposed tunnels would be earthquake-resistant and have a life span of more than 120 years.
The tunnels will have three lanes on either side and will get a coat of reflective paint to ensure adequate lighting. “In case of disaster, 13 cross tunnels would be opened up. Of the 13, seven cross tunnels would be for vehicles and six for human movement. These, though, would only be opened up in times of emergency,” said the official, adding that the two tunnels below Girgaum Chowpatty and Malabar Hill would have a circumference of 11m each.
The civic standing committee cleared the proposal to construct the Rs 12,000 crore coastal road last week. Even as several questions were raised over the escalation of the project cost from Rs 5,000 crore to over Rs 12,000 crore, the administration has assured that there would be no more increase.