31 71 19
Tunnel Excavation by Tunnel Boring Machine
31 71 16
Tunnel Excavation by Drilling and Blasting
31 71 13
Shield Driving Tunnel Excavation
31 71 00
Tunnel Excavation
31 70 00
Tunneling and Mining
31 68 16
Helical Foundation Anchors
31 68 13
Rock Foundation Anchors
31 68 00
Foundation Anchors
31 66 19
Refrigerated Foundations
31 66 16.56
Permanently-Anchored Soldier-Beam Foundation Walls
31 66 16.53
Soldier-Beam Foundation Walls
31 66 16.46
Slurry Diaphragm Foundation Walls
31 66 16.43
Mechanically Stabilized Earth Foundation Walls
31 66 16.33
Manufactured Modular Foundation Walls
31 66 16.26
Metal Cribbing Foundation Walls
31 66 16.23
Concrete Cribbing Foundation Walls
31 66 16.13
Anchored Foundation Walls
31 66 16
Special Foundation Walls
31 66 15
Helical Foundation Piles
31 66 13.13
Rammed Aggregate Piles