32 01 11
Paving Cleaning
32 01 00
Operation and Maintenance of Exterior Improvements
31 77 19
Floating and Laying Submerged Tunnels
31 77 16
Tube Construction (Outfitting Tunnel Tubes)
31 77 13
Trench Excavation for Submerged Tunnels
31 77 00
Submersible Tube Tunnels
31 75 16
Precast Concrete Shaft Lining
31 75 13
Cast-in-Place Concrete Shaft Lining
31 75 00
Shaft Construction
31 74 19
Shotcrete Tunnel Lining
31 74 16
Precast Concrete Tunnel Lining
31 74 13
Cast-in-Place Concrete Tunnel Lining
31 74 00
Tunnel Construction
31 73 16
Chemical Tunnel Grouting
31 73 13
Cement Tunnel Grouting
31 73 00
Tunnel Grouting
31 72 16
Steel Ribs and Lagging
31 72 13
Rock Reinforcement and Initial Support
31 72 00
Tunnel Support Systems
31 71 23
Tunneling by Cut and Cover