Tunneling and Mining Support Services

Services > Tunneling & Mining Support Services

• Management Services
• Underwater Construction Services
• Flooded Shaft and Tunnel Support Services
• Spotlighted Projects and Case Studies

Northwest Underwater Construction (NUC) provides tunnel, shaft, caisson and pipeline construction support services for premier tunneling and mining contractors and joint ventures. NUC has a reputation for managing highly complex tasks in a cost effective and efficient manner. By providing specialty turnkey solutions to contractors requiring hyperbaric equipment and personnel and commercial diving services NUC has become a preferred international provider.

Management Services
NUC provides specialty Consultancy, Equipment and Personnel to Contractors who operate in compressed air environments. TBM Intervention (provides personnel to support TBM interventions including air and mixed gas CAW’s, medical personnel and qualified Man Lock tenders). Services Include:

	Specialty Equipment (Shuttles, Surface Locks, Mixed Gas Life Support Equipment, Robotic Inspection/Radar/Video
	Establish Compression / Decompression procedures
	Treatment and Management of Decompression Illness
	Application of Hyperbaric Oxygen
	Mixed Gas Techniques and Procedures
	Saturation Techniques and Procedures
	Working at Altitude
	Construction Under Compressed Air
	Advice on Airlock System Design
	Audit / Appraisal / Commissioning of TBM Airlock Systems
	Environmental Control
	Training of Client Personnel
	Hazard / Health & Safety Analysis
	Emergency / Rescue / Confined Space
	Data Analysis
	Client Liaison
	Occupational Health & Safety Implementation


Dive Medical Technician reviewing decompression schedule	Diver Decompressing

Underwater Construction Services
We provide specialty consultancy, equipment and personnel to contractors who will be operating in compressed air environments. Services Include:

	Rock and Concrete Anchors
	Custom Bulkheads
	Concrete Placement
	Sediment and Debris Removal (Dredging)
	Commercial Diving in support of Shaft and Tremie Plug Construction
	Mining Ring Installation
	Invert and Crown Repairs
	Concrete Brick, Steel, and Wood Demolition (Diamond Wire, Mechanical Cutting / Blasting and Hand Breaking)


Diver being deployed into brick lined shaft to launch an inspection class ROV into a confined space section of shaft	Two divers being deployed into deep shaft to install mining rings	Commercial diving to support tunnel repair activities including internal joint repairs, external joint repairs, concrete placement and joint harnessing

Flooded Shaft & Tunnel Support Services
Underwater Services - Inspection

	Manned Underwater Video
	Remotely Operated Vehicle Inspections / Video
	Long Tunnel Inspections - Extreme Range
	Sonar - Tremie Pour Monitoring, Out of Round Survey / Horizontal and Vertical Alignment
	Full Three Dimensional Shaft Modeling
	Video like Sonar in Zero Visibility
	Imaging Sonar Radar (inspection of concrete lining)

Specialized Pontoon-ROV for High Flow Tunnel/Shaft Inspections