Site C – In River Environmental Earthworks

Project Summary:

• Rural, steep gullies and variable terrain, in-river works within the Peace River valley including road construction and earthworks grading.
• 168 workers and 90 pieces of equipment at peak.
• 360,289 man hours.
• Excavation of 750 k cubic meters of material from in-river borrow sources for road construction and aggregate production.
• Construction of 2 km of in-river site access roads and a bridge abutment.
• Design-Build of 2.4 m square concrete box culvert and temporary creek diversion system.
• Production and placement of roadway aggregates including sub-base, base, and filter layer gravels.
• Production and installation of riprap ranging from 10 kg to 500 kg.
• Supply and installation of CSP culverts and construction of drainage features including ditches, cisterns, and stilling basins.
• Excavation and storage of potential acid generating shales including the construction of a clay containment liner with HDPE cover.
• Stripping of organics and subsoil to on-site stockpiles. Re-loaming and hydroseeding of road back slopes.
• Completion of work using GPS survey layout and machine grade control.

Challenges and Achievements:

• Project completed on schedule despite winter construction challenges.
• Required to manage important contract milestones and turnover dates to subsequent project contractors.
• Quality of the work to date met or exceeded the contract specifications.
• Creation and implementation of quality control, quality assurance, and quality management plans.
• Adherence to all regulatory and environmental requirements to mitigate the effects on surrounding landscapes and watercourses.
• Manage sensitive monitoring and testing requirements and unique challenges involved with construction operations within the Peace River.

Subcontractors:

• All North – Design of temp. water management and pipe structure.
• Langley Concrete – Design and supply of concrete box culvert.
• Triton Environmental – Environmental monitoring.
• SGS Canada Inc. – Soils testing and quality control.
• Rbee Crushing – Aggregate and riprap production.
• Wilson Concrete – Manufacture and install concrete roadside barriers.