A bullet train company is seeking bids to build India's first underwater tunnel.

Tenders for Mumbai-Ahmedabad High Speed Rail Corridor have been renewed . The tunnel will be built under the sea, seven kilometers under the sea .

According to the tender document, the National High Speed Railway Corporation Limited (NHSCL) has accepted bids for the construction of a 21-kilometer-long tunnel, seven kilometers of which will be under the sea, in the Mumbai-Ahmedabad High Speed Rail Corridor.The project has been praised by sources, who have reported that tenders previously floated and withdrawn have been renewed again.The seven-kilometer undersea tunnel at Thane Creek is the first undersea But the plan was turned down again this year because of administrative problems, and NHSRCL had contacted tenders for the project in January 2019 but did not attract any bidder.In November 2021, the state government held tenders for the project in Maharashtra, including at Bandra-Kurla Complex, according to news agency PTI.