Council of Scientific and Industrial Research-North East Institute of Science and Technology (CSIR-NEIST) in Jorhat will do the geophysical investigation of Brahmaputra tunnel. The main contractor for the geophysical study is American Louis Berger.

The strategic tunnel will be the first sub-water tunnel of India. It will be built under the Brahmaputra river which flows from Tibet to India and to Bangladesh.It will have 4 lanes. It has strategic importance for India amid Chinese aggression along our borders in recent years. It should not be forgotten that Tibet is a country under China's occupation.

https://nenow.in/north-east-news/assam/csir-neist-to-carry-out-geophysical-study-of-indias-first-under-water-tunnel-under-brahmaputra.html