NEOM is a mega-project under development in northwestern Saudi Arabia that combines advanced technologies with a strong commitment to sustainability. This innovative city is designed to integrate a wide array of advanced solutions, from digitalization and clean energy to artificial intelligence and environmental protection. Covering a total area of 26,500 square kilometers, NEOM comprises four sub-projects: the Line, Oxagon, Trojena, and Magna.
The NEOM Time Travel Tunnels, Storage, and Vault Excavation project in the Trojena region involves the creation of an artificial valley and the construction of two TBM tunnels with gradients of up to 40%.
Project’s General Components:
• TTT North Tunnel (TBM-1): 3,622 meters
• TTT South Tunnel (TBM-2): 3,628 meters
• TTT NATM Tunnels: Total 1,036 meters
• Ventilation Tunnels: 137 meters, 2 consecutive tunnels
• Front Shunt Tunnels: 25 meters, 4 tunnels
• Mined Switch Tunnels: 185 meters, 2 tunnels
• Cavern: 81-meter tunnel
• Hammerhead: 15-meter gallery
• Cross Passages: Total 196 meters, 16 tunnels
• Vault Excavation
• Vault NATM Tunnels: Total 978 meters
As of 2025, significant progress has been achieved on the Vault excavation: 7 million cubic meters of the planned 8.88 million cubic meters have been completed, 635,000 meters of the 810,000-meter anchor installation work for excavation support activities have been carried out, and 1,183 meters of the total 1,796-meter rock barrier, designed to prevent rockfalls, have been constructed.
The installation of TBM-1 for the TTT North Tunnel has been completed, and excavation has begun, with 332 meters achieved by the end of 2025. TBM-2 for the TTT South Tunnel has also been installed, all required permits have been obtained, and excavation is scheduled to start in 2026. Excavation and construction continue on ventilation, access, cavern, and cross-passage tunnels within the TTT NATM Tunnel scope. Of the 383-meter rock barrier designed to prevent rockfalls in the TTT project, 174 meters have been completed.