Construction Activities

BC Hydro is committed to providing Peace region residents, businesses, communities and Aboriginal groups with information about Site C construction activities in a timely manner.

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Diverting the Peace River

One of the most important steps in building Site C is to change the route of a short section of the Peace River during construction. Diverting the river allows us to build the earthfill dam across the main river channel, while keeping the river flowing.

We’ll do this by using two large diversion tunnels, approximately 750 metres long and 11 metres in diameter, which are located on the north bank of the river.

Due to the fluctuation of river flows and varying demands on our upstream generating facilities throughout the year, diverting the Peace River must occur in late summer or early fall. Diversion is scheduled to take place in September 2020 over a period of several weeks.

After all pre-diversion construction work is complete (at the dam site and on the river), it will take a number of weeks to safely reroute the river. Once water is flowing through the tunnels, construction will begin on two temporary cofferdams across the river, creating a dry construction area to build the central portion of the earthfill dam.

River closures and portage locations

Diverting the Peace River and constructing the dam will create permanent navigational restrictions on the Peace River.

We are keeping the river navigable and open to boaters as long as it is safe to do so. However, we expect boaters will no longer be able to navigate through the dam site area, as the permanent navigation restriction will take effect in 2020.

We will be notifying the communities and users of the Peace River of safety hazards, including navigational restrictions and changes in boat access in advance of construction activities.

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