BC Hydro says it broke through the second diversion tunnel needed to divert the Peace River ahead of building the earthfill dam at Site C.
The Crown utility said it reached the milestone on Thursday, July 11, after a year of excavations.
The tunnel is around 780 metres long, and will be 11 metres in diameter, the company said. The tunnel will start to be lined with concrete in the coming days, it said.
Contractors broke through the first diversion tunnel in June. The linings are expected to be complete in early 2020, BC Hydro said.
BC Hydro needs to divert the Peace River by September 2020 to keep on schedule, and begin building the earthfill dam across the main channel of the river.
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