consultancy services for preparation of detailed project report (dpr) for construction of second parallel tube adjacent to existing nagabasti single tube tunnel (ch. 138) for its conversion into twin tube 4 lane configuration in the state of assam.

National Highway Authority Of India has invited bids for the consultancy services for preparation of detailed project report (dpr) for construction of second parallel tube adjacent to existing nagabasti single tube tunnel (ch. 138) for its conversion into twin tube 4 lane configuration in the state of assam. The estimated project cost is ₹1.99 Cr. Please refer to the tender document for EMD details. Interested bidders can submit applications until 26 September 2026, with the technical opening scheduled for 28 September 2026.