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SOCIAL ASPECTS:


Site assessment conducted
Reference Panel approved
aboutthissite sustainable hydro power
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Economic

Sainte Marguerite, Canada
Positive sustainability aspect

Vulnerable social groups
Traditional lifestyles of the Innu, a minority indigenous community, were potentially threatened by the Sainte-Marguerite development in Montreal, Canada. A long-term compensation arrangement struck without Government intervention now maintains Innu traditions and provides economic and community benefits to the Innu.

Source: IEA Hydropower Implementing Agreement - Annex VIII.
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Overview

Located on the Sainte-Marguerite River 700 km northeast of Montréal, Canada, the Sainte-Marguerite-3 project consists of a 171-metre-high rockfill dam (the Denis-Perron dam) and an underground powerhouse with two turbines of total installed capacity 882 MW. At approximately 330 metres, Sainte-Marguerite-3 boasts the highest hydraulic head in Québec. The reservoir is 140km long, with an area of 253 km2 and is connected to the powerhouse via an 8.3 km headrace tunnel.

Peak employment during construction reached 1,200 workers, with an average of 500 workers over the eight-year construction period. Construction included a new 86-km-long access road between the Gulf of St Lawrence and the SM-3 generating station.

Scheme Specifications

Dam Name
Scheme operator
Hydro Québec
 Size of scheme (MW)
882
Country
Canada
 Catchment area
River
Sainte-Marguerite
 Effective reservoir capacity
Construction years

 Reservoir size
253km2
External recognition
Nil
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