Project category

Energy

Location

Havre-Saint-Pierre, QC

Value($)

35 000 000

Realisation mode

Unit cost

Customer

Hydro-Québec

Year

2018-2020

Additional informations

Excavation of adduction and related works

Main work performed

• Excavation of the access gallery
• Excavation of the main intake tunnel
• Excavation of the drainage and exit gallery
• Excavation of a large distributor making the connection between the intake tunnel and the penstocks
• Excavation of penstocks
• Concreting of slabs in the galleries of penstocks
• Design and installation of construction services (ventilation, water supply and electricity, fire protection, pumping, etc.)
• Rock consolidation work, including flaking, bolting, injection, installation of protective mesh and shotcrete
• Excavation of the connection gallery to the equilibrium chimney
• Excavation of an equilibrium chimney (50m high x 30m in diameter)
• Excavation of the well of the equilibrium chimney (65m high x 7m in diameter)
• Design and construction of a path to the equilibrium chimney

Special methods and technical features

• Method of construction of tunnels, equilibrium chimney and well by drilling and blasting