Detailed Project Report for Nagabasti Twin-Tube 4-Lane Highway Tunnel Expansion in Assam

Work Description - 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 National Highways Authority of India (NHAI), a Public Sector Undertaking, invites eligible bidders for an Open Tender (Reference Number: NEDIV 22/1/2026 Northeast Division/E 317584, Tender ID: 2026_NHAI_281341_1) for Consultancy Services. The scope of work involves the preparation of a Detailed Project Report (DPR) for the construction of a second parallel tube adjacent to the existing Nagabasti Single Tube Tunnel (CH. 138), aiming for its conversion into a twin-tube 4-lane configuration in the state of Assam. This service contract, valued at ₹1,99,11,500, has a completion period of 150 days and is based on an Item Rate form of contract, with bids remaining valid for 120 days. Interested applicants can download tender documents from June 18, 2026, 05:30 PM, with the bid submission period also commencing on June 18, 2026, 05:30 PM. The deadline for document download and bid submission is August 04, 2026, 11:00 AM. Technical bids will be opened on August 05, 2026, at 11:30 AM. A non-refundable tender fee of ₹5,000 is required, payable to NHAI at New Delhi, while no Earnest Money Deposit (EMD) is specified (EMD amount is ₹0.00). Bidders are required to submit their proposals in two covers: one for Fee/Pre-Qualification/Technical documents and another for Finance, as detailed in the tender documents. For further details, applicants may contact the Tender Inviting Authority, L S RAJPUROHIT, at NHAI HQ.