Chaudière Falls Hydroelectric Redevelopment

2018 Award of Excellence
Canadian Consulting Engineering Awards

20,000
homes powered

115,000 metric tons
per year of GhG emissions saved

29 MW
generating capacity

Challenges

Redevelop the existing hydroelectric generating facilities on Chaudière Island on the Ottawa River.
Construct a new 29 MW generating station with an enlarged intake and discharge channel, and retire the existing Ottawa No. 2 (6 MW) and Ottawa No. 3 (3 MW) stations from service.
Generate clean, renewable energy while reducing the impact to the environment, providing a public place for everyone’s enjoyment, and paying tribute to Canada’s native peoples and history.

We are providing full EPCM services for the design and execution.
The plant will have an enlarged and hydraulic-efficient intake and discharge channel, allowing a maximum of 340 m³/s through the facility.
Design includes a downstream passage protection system for the endangered American eel and a spawning habitat for lake sturgeon in the tailrace. An upstream eel passage has also been incorporated into the permanent works.

The power facility design includes safe viewing platforms, greater public access along a corridor on the new hydro facility’s roof to the newly constructed public plaza, and uninhibited views of the existing dam and Ottawa River.
Two of the oldest existing buildings on the site will be restored and repurposed.

29 MW powerhouse
4 turbine generator sets
164 GWh /year of power