Flatiron is part of a partnership building the Generating Station and Spillways (GSS) Civil Works for the Site C dam on the Peace River in northeastern British Columbia (BC), just outside of Fort St. John.

The GSS Civil Works is part of the greater Site C dam project, one of the largest construction projects in BC history.  Site C will provide 1,100 megawatts of capacity and about 5,100 gigawatt hours of energy each year, enough energy to power the equivalent of about 450,000 homes per year in BC. It is being built to last more than a century.

Even by itself, the scope of the GSS Civil Works is enormous. Project crews will place nearly 25,000,000 cubic feet of mass and reinforced concrete for the spillways, powerhouse, and penstock encasement – the equivalent of 280 Olympic-size swimming pools of concrete. The project also includes nearly 75,000,000 pounds of rebar – the equivalent of more than four Eiffel Towers.

Once complete, the formed surfaces of the GSS will be enough to cover 63 NFL football fields.

Flatiron and its partners are performing a host of works related to the construction of the powerhouse, the heart of the Site C dam. That includes work on structural steel, intake trash racks and anti-vortex devices, concrete placement to secure the turbine-generators and many other functions.

Penstock at Site C

The project also includes six penstocks, large water conveyance pipes made of steel and encased in concrete. They transport water to the powerhouse so it can run through the facility turbines. Flatiron and its partners are responsible for the procurement, building, and erection of the 33-foot-wide penstock units.

To ensure that components are built to the highest level of quality, engineers have systems in the field to prevent design clashes prior to them occurring, and they use the latest technologies to monitor, track, and modify the thermal properties of the concrete post placement. Cutting-edge anti-collision systems are in place for tower crane coordination.

Part of one of largest projects in British Columbia history.

Project includes nearly 25,000,000 cubic feet of mass and reinforced concrete for the spillways, powerhouse and penstock encasement.

Once complete, the formed surfaces will be enough to cover 63 NFL football fields.