Klohn Crippen Berger (KCB). was retained by Kleana Power Corporation to prepare a basic design for the Klinaklini Hydroelectric Project. The basic design was used as an input for a selected contractor to provide a cost estimate for the construction of the project.
KCB’s scope of work included preliminary design of all civil, structural, mechanical and electrical aspects of the diversion weir, intake, tunnel, steel liner, powerhouse and tailrace. Work included coordination of design for the transmission line and switchyard; environmental permitting; and basic hydraulic parameters for the diversion weir, intake and tunnel.
The Klinaklini Hydroelectric Project is located on the east branch of the Klinaklini River, approximately 150 km north of Campbell River near the head of Knight Inlet. The nominal project capacity is 450 MW provided by 6×75 MW Pelton turbines. Water is diverted from the Klinaklini River via a 30 m-high, 136 m-long diversion weir and flows through the power intake into an 18 km-long, 8.3 m-diameter tunnel. The Project has a total design flow of 180 m3/s, with a gross head of 315.1 m. Power from the generating station will be delivered to the British Columbia Transmission Company (BCTC) grid on Vancouver Island via a 167 km-long single circuit 230 kV transmission line.
The intake diversion weir contains a spillway, a non-overflow sluice section and a minimum in-stream flow release section. Radial sluice gates located in the sluice section allow the passing of sediment and bed load. The power intake structure contains a coarse trashrack, a fine trashrack, an intake stoplog, and an operating/emergency gate. A trashrake is also provided.
The powerhouse will be located in a rock excavation on the left bank of the Klinaklini River about 1 km upstream of the confluence with the West Klinaklini River. Each generating unit is served by a three-phase step-up transformer located on the downstream side of the powerhouse. The switchyard is located on two benches excavated into the rock behind the powerhouse. The transmission line will require two major water crossings over Johnston Straight and Cordero Channel.
- Geotechnical investigations
- Mechanical engineering
- Geotechnical engineering
- Electrical engineering
- Structural engineering
- Civil engineering
- Socio-economic assessment
- Input to Environmental Assessment certificate application