Canada utility to strengthen 105-MW Ruskin Dam

BC Hydro says water levels at Hayward Lake Reservoir will remain low for as long as five years, until a permanent seismic reinforcement of Ruskin Dam is designed and implemented.

The utility began lowering the lake in October. It said reinforcement is necessary because the 59.4-meter-tall concrete dam — part of the 105-MW Ruskin project — does not meet current criteria for a maximum design earthquake.

Ruskin Dam impounds Hayward Lake Reservoir on the Stave River, downstream of 90-MW Stave Falls in British Columbia province. Although effects of the drawdown on generation will vary, BC Hydro could lose C$1 million (US$845,000) annually to forgone generation.

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