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Indian Railways Completes Odisha’s Longest Rail Tunnel on Khurda–Balangir Line

The 4.185 km Tunnel T-4 breakthrough marks a significant milestone in the 301 km rail corridor project linking Odisha’s coastal and western regions.

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Overview

  • Tunnel T-4, the longest rail tunnel in Odisha, was successfully completed on April 16, 2025, between Adenigarh and Charichhak stations in Boudh district.
  • The tunnel spans 4.185 km and was constructed using the New Austrian Tunnelling Method (NATM) through challenging clay-pebble strata.
  • The Khurda Road–Balangir rail line has 226 km operational, with the remaining 75 km central segment, including seven tunnels, still under construction.
  • Once fully completed, the 301 km rail line is expected to enhance regional connectivity, promote integration, and drive economic growth across Odisha.
  • The project, prioritized by Indian Railways and East Coast Railway, aims to address long-standing transportation gaps in the region.