Site C Clean Energy Project

The Site C Clean Energy Project will be a third dam and hydroelectric generating station on the Peace River in northeast B.C. The project will provide up to 1,100 megawatts of capacity, and produce approximately 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 is scheduled for completion in 2024.

Klohn Crippen Berger (KCB) has provided comprehensive engineering and support services since the earliest days of the project. From 1989 to 1991, we were involved with the preliminary and final design activities. Since 2007, we have provided preliminary, optimization, tender and final design engineering services; technical reviews; support services to the environmental assessment process; and resident engineering services.

Challenges

  • Historic design required optimization to meet current seismic, safety, and environmental guidelines
  • Shale foundation with bedding planes and relaxation joints
  • Due to RCC buttress configuration, alignment of approach flows to intakes and spillway not optimal
  • Challenging reservoir filling arrangement due to the overall project layout

Solutions

  • As part of an integrated engineering team, KCB provided engineering services to optimize the project to meet updated guidelines
  • As part of an integrated engineering team, KCB developed an innovative solution using a Roller Compacted Concrete (RCC) buttress to stabilize the original river valley wall and serve as the foundation for the generation station and spillways
  • Engineering team conducted and oversaw extensive numerical and physical hydraulic modeling and designed wide, low velocity approach channel, anti-vortex devices, and un-symmetric curved guide walls and piers
  • Engineering team has designed in-line steel orifices that will be retrofitted into one of the two diversion tunnels that will control downstream flows during reservoir filling

 

Papers:

Bruce, J. 2017. “Site C Clean Energy Project Diversion Tunnel Orifices for Energy Dissipation During Reservoir Filling,” in CDA 2017 Annual Conference, October 16-18, 2017. Kelowna, BC, Canada.

Heidstra, N., J. Nunn, A. Watson, K. Dodman, R. Carter, and L. Burmeister. 2017. “Roller Compacted Concrete Buttress at the Site C Clean Energy Project.” Canadian Dam Association Bulletin. 28(3): 12 -23.

If you are interested in obtaining these publications, please email library@klohn.com.