Bipole III 500kV HVDC

Project Summary

Client

Manitoba Hydro

Location

Manitoba, Canada

Length

700km

Voltage

500kV Bi-Pole HVDC

Structure Type

1400 structures
Steel Lattice Tower

Line Configuration

Triple bundle 806-A4-61 Bare Aluminum Alloy Stranded Conductor and OPGW 48 fibers

Foundation Types

Helical Piles, Cast-in-Place Concrete Piles, Micro Piles, Rock Set and Concrete Mat

Completion Period

October 2015 - October 2018

Project Sector

Transmission

PROJECT DESCRIPTION

Forbes Bros constructed 700 km of the 500 kV HVDC Bi-Pole steel lattice tower transmission line for Sections N2, N3, S1, and S2 and C1 foundations. The foundation types for these projects required helical pile, micro pile, rock set, concrete mat and cast-in-place foundations.

SERVICES PROVIDED - PROJECT CHALLENGES

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  • Right of way preparation – brushing and clearing, approach and road construction, environmental and construction matting, fence & gate installation/removal
  • Community engagement – strong focus on First Nations and Landowner involvement on projects to ensure benefits flow to local community
  • Structure assembly & erection – Helicopter and conventional crane erection
  • Stringing – Tension and slack stringing of bundled conductor
  • Implosive and compression splices & dead-ends
  • Installation, termination and point to point testing of OPGW
  • Reclamation – De-compaction, seeding, aerating, rut repair, cleanup
  • Commissioning – Line inspection, phases check, clearances and energization/service readiness
  • Species at risk, bio-diversity and bio-security land use restrictions
  • Establishment of remote camps
  • Fluctuating weather: -40C to +30C temperatures, overland flooding and winter storms
  • Multiple crossings including existing energized facilities, water bodies, communities, and major transportation corridors and muskeg