USBRL Tunnel 33
USBRL Tunnel 33, previously known as Tunnel 1, is a long railway tunnel located between Katra and Reasi in Jammu and Kashmir, India. It forms a critical part of the Udhampur-Srinagar-Baramulla Rail Link project, which aims to connect the Kashmir Valley with the Indian railway network. The tunnel is noted for its challenging construction due to complex geological conditions in the Himalayan terrain. It was fully completed in December 2024.
Background
The USBRL project was sanctioned in 1994–95 and declared a national project in 2002. Spanning from Udhampur to Baramulla via Srinagar, the project includes 36 tunnels and 927 bridges. The Katra–Banihal section, which includes Tunnel 33, is executed by Northern Railway, Konkan Railway Corporation Ltd., and IRCON. The project is designed to provide all-weather connectivity to the Kashmir Valley, reducing travel times and boosting tourism and trade.Construction
Construction of USBRL Tunnel 33 initially employed traditional tunneling methods but later adapted to the I-System of Tunneling to address the demanding geological environment. The tunnel traverses the lesser Himalayas, cutting through highly jointed and fractured dolomite and intersecting the Main Boundary Thrust, a major shear zone. These conditions presented significant challenges, including rugged terrain, water ingress, and mud influx.A key milestone was achieved with an excavation breakthrough on December 20, 2023. However, progress was hampered in January 2024 by further water and mud influx. By May 2024, remaining tasks were still in progress as efforts continued toward completion.