Duncan Dam

Castlegar, BC

Spillway rehabilitation

In order to meet the new seismic requirements, BC Hydro mandated HMI for the rehabilitation of the two spillway gates (SPOG) and hoist systems.

Work in confined space

The work also included the complete replacement of hoist structure and hoist towers. The project was completed in 2011.

The challenge

  • Seismic upgrade of the hoist systems, structure and enclosure of the spillway gates system.
  • Maintain a recall plan to allow for emergency spilling during the whole project.

The result

  • Project completed under the spillway gate rehabilitation program partnership (PPA) developed with BC Hydro.
  • Project completed on time and on budget.


$ 17.8 Million


Completed in 2011

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