"Following a complicated excavation project resembling a mining operation, a tunnel connecting the new station to Hydro One equipment has been recently completed," the municipal electricity distributor said in a release.

The tunnel runs 100ft (30.5m) underground from Bremner Boulevard and Rees Street to Front and Simcoe Streets. When construction is complete, electricity will flow through large cables in the tunnel to supply the station.

"The completion of this stage of work is a turning point," said Anthony Haines, president and CEO, Toronto Hydro. "Copeland Station represents an important piece of Toronto’s infrastructure and a smart investment in the grid. It’s needed to help power the growth of the city, while respecting public green spaces."

Construction on Copeland Station is ongoing and is expected to be completed in 2016. The CAD 195M (USD 158M) project is the first station to be built in downtown Toronto since the 1950s. This innovative project is only the second underground station to be built in Canada and has been uniquely designed to preserve public green space beside the Roundhouse, a historical building.