Diversion Tunnel Orifices for Energy Dissipation During Reservoir Filling – Site C Clean Energy Project

July 16, 2020

The Site C Clean Energy Project is an 1,100 MW hydroelectric generating station with a 60 m high dam on the Peace River near Fort St. John, BC, Canada. The Site C design includes two fully submerged diversion tunnels each 10.8 m in diameter with gated inlet structures. The capacity of the diversion tunnels needs to be reduced during reservoir filling to allow the reservoir to fill with normal inflows from the upstream generating stations. In this presentation, Jeremy will provide an overview of the Site C project and will present a summary of the detailed alternative evaluation for reservoir filling that took place during design. Jeremy will focus on the selected reservoir filling alternative which is a unique solution in North America consisting of a series of four in-line orifices that will be retrofitted in one of the diversion tunnels prior to reservoir filling. The orifice design is based on work in China on the Xiaolangdi project, as well as physical hydraulic modelling (PHM) and computational fluid dynamics (CFD) modelling.
For general information about the Site C Clean Energy Project, visit www.sitecproject.com

You can access the slides here.


Jeremy Bruce, P.Eng.

Jeremy Bruce is a Civil Engineer with a focus on hydrotechnical engineering. He has 12 years of broad experience in the management and design of hydroelectric and water resource infrastructure projects. Jeremy has worked on a range of hydroelectric projects from small redevelopments to large new construction and specializes in the hydrotechnical design of spillways, tunnels, powerhouses, and water conveyance systems including power intakes and penstocks.    

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