Prime Minister Narendra Modi's dream project of bullet train is underway in Mumbai. The under the sea tunnel is expected to complete by August 15, 2022 according to the MD of National High speed rail corporation Ltd. (NHSRCL) Achal Khare. "Our mission is to complete tunnel till 15th August, 2022. Currently, we are doing static refraction survey on the sea with Japanese. We are facing challenges like the high tide; this survey is possible on high tide. Our survey says total seabed is 10-15 meter depth and our tunnel will construct 25 to 40 meters depth from seabed," Khare told ANI during the work inspection for the project. The data acquisition work on the tunnel project started from December 11, and is expected to be finished by December 24.

Japanese and Indian professionals are working diligently on ensuring to build a tunnel inside the creek near Thane. The bullet train between Ahmedabad and Mumbai will run a total length of 508 km, of which 21 km will be covered in the tunnel under sea. The cost of the tunnel is estimated at Rs 3,500 crores. The cost of the total train project is Rs 1.10 trillion, and Japan is giving a loan of Rs. 88,000 crores for the same at a minimal interest of 0.1 per cent, which has to be repaid over 50 years.