Hard Rock Projects

• Niagara Tunnel Project 14.4 m
• West Qinling Rail Tunnels 10.2 m
• Kargi Hydroelectric Tunnel 10.0 m
• Pula Subbaiah Veligonda Tunnel 2 10.0 m
• Alimineti Madhava Reddy (AMR) Tunnel 10.0 m
• Black River Storage & Conveyance Tunnel 7.0 m
• East Side Access 6.7 m
• Chongqing Metro Line 6, Phase 2 6.3 m
• Mumbai Water Tunnel 6.25 m
• Indianapolis Deep Rock Tunnel Connector 6.2 m
• Stillwater Mine, Blitz Tunnel 5.5 m

• Olmos Trans-Andean Tunnel 5.3 m
• Stepantsminda Hydroelectric Project 5.3 m
• Pahang Selangor Raw Water Tunnel 5.2 m
• Akkoy II Hydroelectric Project 4.8 m
• Thuong Kon Tum Hydropower Project 4.5 m
• Yamanli II Hydroelectric Project 4.3 m
• Eidi II Hydroelectric Project 3.4 m
• Bi-County Water Tunnel 3.3 m
• Mill Creek Effluent Tunnel 3.1 m
• Jollyville Transmission Main 3.0 m