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faces. A bedrock grouting program was also designed to make the fracture zone watertight.

Every effort was made to prevent an uncontrolled release of water from Umfreville Lake. Such an event would have both safety impacts and catastrophic environmental consequences.

OPG held regular review sessions with its dam safety expert panel of internationally recognized engineers, whose input was incorporated at key stages of the project, from preliminary design through construction.

T he replacement dam was designed to meet modern standards, augmented with instrumentation and telemetry to support OPG’s dam safet y monitoring and sur -

veillance program.

Goals accomplished

The project was completed a month ahead of schedule, allowing OPG to proceed with raising the reservoir back to normal operating levels, restoring the generation station’s power production capacity.

Reconstruction, Caribou Falls, Ont.

Award-winning firm (prime kgsgroup.com

Owner: Ontario Power Generation. Other key players: Peter Kiewit Sons (contractor).

Award of Excellence