SubTerra, Inc.

Full-lifecycle tunneling and underground excavation services covering site investigation, design and engineering, construction management, and field services. Experience with conventional drill-and-blast, NATM/SEM, TBM, EPBM, MTBM, and pipe-jacking on tunnels from 40 ft to 9 miles in length.

• Tunnel Design

  Preliminary and final design of tunnels and microtunnels including site investigation programs, excavation method selection, ground support design, Geotechnical Baseline Reports (GBR), geotechnical data reports, and risk management analysis.

• Micro-Tunneling

  Remotely controlled, laser-guided pipe-jacking and microtunneling for small-diameter no-man-entry tunnels. Services include site investigations, equipment and method selection, design and cost estimates, settlement monitoring, and geotechnical field services during construction.

• Tunnel Repair & Rehabilitation

  Refurbishment and waterproofing design and specification for existing tunnels.

Geotechnical and rock mechanics services for mining applications including preliminary investigations, site investigation program design, rock-fall hazard modeling, active and abandoned mine subsidence analysis, quarry and surface mining planning, and computer-aided mine planning using GEMCOM for Windows.

• Quarry & Surface Mining

  Reserve estimates with large rock recovery projections, geologic mapping, exploration drilling, source evaluations, and geologic and rockfall hazard analysis.

• Active & Abandoned Mine Subsidence

  Subsidence prediction and impact evaluation for roads, structures, surface and groundwater, pipelines, and landfills; rock mechanics modeling for mine abandonment; regulatory expertise and remedial measures.

Blast design, diagnostic monitoring, and blast optimization; blast permitting; far-field and compliance monitoring; permit and litigation expert testimony; Instantel equipment sales and rental.

Quantity take-offs and cost estimates, contract and bid document preparation, value engineering, construction quality assurance, contract negotiation and contractor selection, change order evaluation, and construction phase services including site visits and RFI response.

Geotechnical instrumentation setup and automated monitoring for settlement, subsidence, support performance verification, and construction progress tracking.

3D spatial data management, 3D geological modeling, project and design visualization, dynamic 3D modeling for blueprints and drawings, and data graphics and technical representation.

Environmental impact statement (EIS) preparation, site planning, sensitive area review, surface water management, and subconsultant management for wetlands, wildlife, fish, noise, and traffic disciplines.

Expert testimony and litigation support for blast-related permits and ground-condition claims; claims preparation or evaluation for construction contracts.