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Customized Solutions for Rough Terrain
The Keeyask Generating Station in Manitoba, Canada will be a 695 MW hydroelectric generating station providing clean, renewable energy. An average of 4,400 GWh of electricity each year will be supplied to both Canada and to the United States. The facility will include a powerhouse/service bay complex on the north side. The Seven Bay Spillway is located on the south side, with 1.5 km between the 2 sets of structures. The generating station is located in a remote location approximately 725 km north of Winnipeg on the lower Nelson River and getting material and support to the site is difficult. It is also difficult terrain and the rock elevations vary substantially. Due to the size of the project, the amount of equipment required at the same time is a challenge. Additionally, the job requires a complex 3D design of the draft tube formwork. Special quality requirements include fair-faced concrete and SCC mix design throughout the project. All forms are designed for a full liquid head concrete pour pressure. To work under these conditions, the contractor hired 2 Doka field service techniciansand 1 Doka site engineer to stay at camp on a 21 day-in/ 7 day-out rotation. Doka was chosen as the formwork supplier due to their strong role in working with project time constraints. Specialists from Doka’s North America Major Account and Project team and Western Canada worked tirelessly for months, using 3D printed models and state-of-the-art 3D CAD programs to put together a quotation package that went above and beyond the competition. The D22 rollback feature was an advantage, since it allows for quicker resetting times. With its ease of use, formwork is easily transferred from one area to another when finished on a particular section, meaning less equipment is on site. The formwork provides for worker safety with large work platforms integrated into the design. The system is efficient through cycling and reuse of equipment.
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