Site C Clean Energy Project

Unnamed Road Charlie Lake British Columbia V0C 1H0 CA

The Site C Clean Energy Project (Site C), located on the Peace River 7 km southwest of Fort St. John, will be a third dam and hydroelectric generating station on the Peace River in northeast B.C. Site C will provide 1,100 megawatts of capacity, and produce about 5,100 gigawatt hours of electricity each year – enough energy to power the equivalent of about 450,000 homes per year in B.C. Construction of the project started in summer 2015 and will be completed in 2024.

Klohn Crippen Berger (KCB) has provided comprehensive engineering and support services since the earliest days of the Site C project. From 1989 to 1991, KCB performed engineering preparatory activities on BC Hydro’s 1981 project design. This work included preliminary engineering for the project, and final engineering for early contracts such as the diversion tunnels, camps, and access roads.

In 2005, KCB undertook an assessment of design issues which could affect the project cost. From 2007 to 2009, KCB provided comprehensive engineering and consultation support services during Stage 2: “Consultation and Technical Review” of a multi-stage project development process. In 2009, at the conclusion of the project’s Stage 2 work, BC Hydro concluded that the historic design for Site C required optimization to meet current seismic, safety, and environmental guidelines. KCB provided engineering services during 2010 as part of an integrated engineering team to optimize the project to meet the updated guidelines.

The updated project design consists of a 60 m-high earthfill dam and a separate buttress of roller-compacted concrete to support the valley wall and provide the foundation for the concrete structures as well as forming the south abutment of the earthfill dam. Flows would be discharged via a gated concrete spillway with a free overflow concrete spillway providing additional capacity. A six-unit generating facility would provide up to 1100 MW of capacity. Two tunnels would be required for diversion of the river during construction.

In 2011, the project was formally accepted into Stage 3, the environmental and regulatory review stage, which includes a thorough and independent environmental assessment process, including a joint panel review. During 2011 and 2012, KCB continued as part of the integrated engineering team to provide comprehensive engineering services to BC Hydro to advance the design of the project, including support to the environmental assessment.

In 2013 and 2014, the Integrated Engineering Team (IET) advanced the definition design of the major project components and initiated early implementation and tender design activities. The design development included monitoring and collaboration of physical hydraulic model testing of the diversion and spillway facilities. In addition, KCB, as part of the IET, continued to provide support services to the environmental assessment process.


  • Site Investigations
  • Preliminary Design (historic design)
  • Final Design of early contracts (historic design)
  • Stage 2 Engineering Services
  • Consultation Support
  • Optimization Design services
  • Stage 3 Engineering Services
  • Support to the Environmental Assessment
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