CANADA These are representations of standard pipeline construction techniques. Trans Mountain will use the most appropriate technique for each specific location. PIPELINE CONSTRUCTION METHODS May 2017 Conventional Pipeline Construction Salvaged Topsoil Salvaged Topsoil Excavated Subsoil Trench Subsoil Side Permanent Right-of-Way Construction Footprint Boundary Construction Footprint Boundary Construction Footprint Work Side Work Lane Existing TMPL Pipeline Travel Lane Trenchless Technique for Crossing Roads and Railways
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CANADA
These are representations of standard pipeline construction techniques. Trans Mountain will use the most appropriate technique for each specific location.
PIPELINE CONSTRUCTION METHODS
May 2017
Conventional Pipeline Construction
SalvagedTopsoil
SalvagedTopsoil
ExcavatedSubsoil
Trench
Subsoil Side
Permanent Right-of-Way
ConstructionFootprintBoundary
ConstructionFootprintBoundary
Construction Footprint
Work Side
Work Lane
Existing TMPLPipeline
Travel Lane
Trenchless Technique for Crossing Roads and Railways
Community Construction Schedule
2018
• Clearing continues
• Direct pipe installation in key areas
• Hydrovacing
• Pipeline construction: - Grading - Stringing - Welding - Trenching - Lowering in - Backfill - Cleanup
• Terminals and trenchless construction
• Hydrostatic testing
• Road boring
• Reclamation/Restoration
2019
• Pipeline construction continues
• Hydrostatic testing continues
• Leave to open
• Commissioning
• Cleanup
• Restoration
2017
• Infrastructure – laydowns
• Hydrovacing
• Construction yards
• Clearing
• Start of grading in select areas
• Site preparations for Sumas Terminal expansion and major trenchless pipeline locations
• Select river crossings and specialty construction
May 2017
Spread 6 - Fraser Valley Key Construction Activities
Committed to Safety Since 1953.
Pipeline Construction Methods
May 2017
Direct Pipe™
• Direct Pipe is a trenchless installation technique combining the benefits of micro-tunnelling and Horizontal Directional Drill (HDD) trenchless crossing techniques
• The pipeline is attached to a boring machine pushed forward by a thruster attached to the pipe as the machine excavates
• Allows for simultaneous borehole excavation and pipe installation and can progress at a rate of 25 to 50 metres per day depending on ground conditions
• The excavated material is pumped out via the pipeline
• Can be applied to a wider range of ground condition than HDD but there are limitations on length of installation compared to HDD
Benefits of Direct Pipe:• Allows for reduced environmental foot print due to shorter pipe entry length requirements than HDD
• Permanent borehole support during construction
• Can be used for gravelly/sandy soils
Separation Plant
Pipe Thruster
Control Containers
Machine
Committed to Safety Since 1953.
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