Results of Trial Grouting at Ontario Power Generation's Sir Adam Beck Pump Generating Station Reservoir, Niagara Falls-Video

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Video Summary

At Ontario Power Generation’s Sir Adam Beck pumped-storage facility, a new grout curtain was designed to reduce seepage through shallow bedrock beneath the reservoir dike. A full-scale trial tested the installation method, especially contact grouting intended to protect the clay core and treat the overburden–bedrock interface. Excavation showed the barrier bags and annulus filling worked, but the interface contained little erodible material and took little grout. The trial also revealed potential voids beneath inflated bags. Based on these findings, the team removed contact grouting, repositioned the bags, and later simplified the installation further. The trial reduced scope, cost, schedule, and construction risk.

Keywords

grout curtain

pumped-storage facility

seepage control

contact grouting

bedrock interface