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Eastmain-1-A-Sarcelle-Rupert
  Eastmain-1
  Des Cèdres-Cornwall transmission line
  The La Grande Complex

SEBJ is the architect and builder of one of the largest hydroelectric developments in the world: the La Grande complex, which

includes 8 hydroelectric generating stations
has an installed capacity of 15,240 MW
produces an annual output of 78.3 billion kWh
provides over 50% of the electricity generated by Hydro-Québec, and
cost over $20 billion to build

This major project involved building large-scale, temporary infrastructures such as airport and residential facilities, as well as extending the existing Québec road system by several thousand kilometres.

Following are some of the figures and quantities that went into building the La Grande complex:
6 airports, 7 workers' villages and 2,100 kilometres of roads
304 retaining structures (dikes and dams)
Installation of six 735-kV transmission lines and one direct-current ± 450-kV line, for a total length of around 7,400 km (work carried out under the responsibility of Hydro-Québec).
Accommodations for 18,000 workers during the peak construction period
286,630,000 cubic metres of excavated material and fill
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