Numbers and Titles



31 70 00 Tunneling and Mining
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Includestunnel boring, bracing and jacking work, including excavating, linings and casings, grouting support systems, boring machines, control and spoil removal systems.
See03 30 00 for cast-in-place concrete. 31 23 19 for dewatering. 31 40 00 for shoring and underpinning. 31 52 00 for cofferdams. 33 05 07 for trenchless installation of utility piping
31 71 00Tunnel Excavation
31 72 00Tunnel Support Systems
31 73 00Tunnel Grouting
31 74 00Tunnel Construction
31 75 00Shaft Construction
31 77 00Submersible Tube Tunnels