Case Study: Waneta Substation Replacement - Teshmont: Leaders in Power Delivery Engineering

Case Study

Waneta Substation Replacement


Teck Cominco Metals Ltd operates one of the largest fully integrated lead/zinc smelters in the world in Trail, British Columbia. For nearly 60 years, the power required to run the smelting operation was supplied from the Edgewood dam. Due to its age, upgrades were needed to address a number of reliability and safety issues.


Teshmont was selected to carry out a feasibility study and prepare cost estimates for several options for upgrading or replacing the 63/230 kV Waneta substation. After careful consideration, Teshmont’s recommendation was to replace the existing substation with a new 63 kV GIS substation to be located adjacent to the existing powerhouse.

Teshmont provided design services for the new substation including switchyard layout, primary and secondary equipment specification, and complete substation automation system design. Commissioning management and support were also provided by Teshmont.

Teshmont provided the following services:

  • Feasibility study and preparation of a cost estimate to replace the existing 63 kV switchgear and protection at Waneta using GIS technology, and replacement of the 63/230kV autotransformers for line 71L and associated protection systems.
  • Preparation of design criteria for the project as well as equipment specifications necessary for budgetary cost estimates.
  • Definition of the interfaces between the 63 kV and 230 kV substations and the hydro generating plant including station service power, communications, SCADA control at the generating plant and with the System Control Centre.
  • Development of an execution plan for the project from engineering through to construction and commissioning.
  • Preparation of the project schedule.
  • Preparation of substation layout design.
  • Preparation of equipment specifications.
  • Design of substation automation system for all 63/230 kV equipment.
  • Commissioning management and support.
Case Study Category: Engineering Design
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