Tunneling Expertise

  • Rail transit
  • Freight rail
  • Roadway tunnels
  • Pedestrian tunnels
  • Water & wastewater tunnels
  • Trenchless technologies



Transit Tunnels

Tunnels & Trenchless Technologies



Ashbridges Bay Treatment Plant Outfall
Anticipated to be the largest wastewater outfall in Canada

Minneapolis weathers the storm with a new parallel tunnel
Lowering the pressure on the Central City storm tunnel system

Regional Connector Transit Corridor
People-moving that benefits the environment and economy

Euclid Creek Storage Tunnel
Reducing overflows in the District’s entire service area

Elm Road Generating Station Water Intake Tunnel
Providing over two-billion gallons of cooling water per day

Dulles Airport Tunnels
New landside, airside facilities enhance travel and accommodate growth

Kemano Second Tunnel (T2) Project
Enhancing the long-term reliability of renewable hydropower for aluminium smelter

Burnhamthorpe Water Project
Making way for dramatic urban transformation

Mid Halton Wastewater Treatment Plant
Award of Excellence at the 2020 Canadian Consulting Engineering Awards

Port Mann Water Supply Tunnel
Safe, dependable water delivery to the Vancouver Lower Mainland

Seymour-Capilano Twin Tunnels
Delivering clean drinking water to Vancouver residents

Niagara Tunnel
World’s Largest hard-rock-tunnel-boring machine was used in construction

Latest News

DC Water Potomac River Tunnel, USA

Hatch is shortlisted for Bid Design services with CBNA-Halmar, and engineering team partner COWI

Minneapolis Central City Parallel Tunnel, USA

Tunnel construction by PCI Roads commenced in September 2021

ALCOSAN Deep Interceptor Shafts, USA

Design of new access shafts to the 60% design level is ongoing

Inner Harbour West Tunnel, CAN

Design of new CSO tunnels and shafts in the heart of downtown Toronto is ongoing

Ashbridges Bay Treatment Plant Outfall, CAN

Excavation for the 3.5km long, 7m internal diameter tunnel was successfully completed in March 2022 by Southland. Work is ongoing for the riser tunnel connections

Kemano T2 Project, CAN

Final tunnel walkthroughs are ongoing in preparation for dry and wet commissioning to begin conveying water for electric power generation

Annacis Island WWTP Outfall, CAN

TBM tunneling and riser construction is ongoing for the new outfall by BeSSAC

Ontario Line South Civil, CAN

Tender design completed and submitted together with our teaming partners Arup, Aecon, Dragados and Dr. Saur


Cost & Schedule Estimating
Tunnel Feasibility Studies
Economic Evaluations
Major Investment Studies
Corridor Analysis
Trenchless Technologies
Microtunnel Boring Machines
Horizontal Directional Drilling
Jack & Bore
Pipe Ramming
Tunnel Lining Design
Pre-Cast Concrete Segmental
Cast-in-Place Concrete
Steel Liner Plate & Ribs
Tunnel Design
Hard & Soft Rock
Soft Ground
Tunnel Lining Design
Pre-Cast Concrete Segmental
Cast-in-Place Concrete
Steel Liner Plate & Ribs

Ground Improvement
Jet Grouting
Compensation Grouting
Permeation Grouting
Ground Freezing

Project Delivery
Contract Documents
Contractor Design
Public-Private-Partnerships (P3)
Owner’s P3 oversight
Geotechnical Characterization
Geotechnical Baseline Reports
Geology & Hydrogeology
Investigation & Assessment
Instrumentation & Monitoring
Conventional & Linear Survey
MPBX, Tapex, Inclinometer
Electronic Data Collection
Construction Management
Contract Administration
Resident Engineering
Claim Resolution
Payment Review
Numerical Modeling of Ground
Structure Interaction
2-D & 3-D Modeling
FLAC, Phase2, Staad
Settlement Prediction & Mitigation
Building & Utility Damage
Monitoring Programs
Pre-Construction Condition Surveys
Pre- & Post-Tunneling Mitigation
Program Management
Program Delivery
Project Controls
Document Management
Configuration Management
Contract Packaging
Seismic Hazard Assessment
Design Ground Motions
Fault Hazard Assessment
Fault Crossings
Liquefaction Potential
Risk Management
Risk Registers
Qualitative Assessments
Quantitative Assessments
Monte Carlo Analysis
Tunnel Excavation Methods
Mainbeam & Shielded Rock TBMs
EPB & Slurry Soft Ground TBMs
Sequential Excavation Methods
Drill & Blast
Conventional & Hand Excavation
Rock Support Design
Rock Bolts
Steel Mesh
Lattice Girders & Ribs
Spiles & Canopy Tubes
Fire Life Safety Analyses
Code Compliance
Exit Analyses
Fire Modeling
Condition Surveys
Corrosion & Design Life Assessment
Remediation Design
Emergency Repairs
Systems Restoration

For more information, visit Tunnels on, or contact us.