Services Auger Boring Small Boring Unit (SBU) Heavy Transport Hydro-Excavation Rock Tunneling Railroad Services Milliken GeoSpray Lining Pilot Tube/Guided Boring/Axis Horizontal Directional Drilling Open Cut Conventional Tunneling (Soft Ground) Hand Mining Spiral Wound Lining Cellular Grouting Pipe Ramming/Pipe Hammering Shaft Installation Pipe Jacking / Tunneling Microtunneling Earth Pressure Balance Machine Sliplining