Construction is complete on the Heartland transmission line, EPCOR announced Saturday.

The 66-kilometre transmission line links south Edmonton to the Heartland industrial area north of the city.

"The Heartland transmission project – which is an important upgrade to Alberta's transmission power grid – is now complete and was energized just a few hours ago," said EPCOR spokesman Tim le Riche.

As the line is now in operation, nearby residents and businesses may hear a buzzing or crackling noise. The noises will dissipate as operations settle in, he said.

EPCOR is also reminding people to be cautious around the electrical equipment associated with the line.

The line’s completion will mark a significant upgrade to Alberta’s transmission infrastructure, le Riche said.

"There has not been any substantial upgrade of Alberta's transmission system in a number of decades. It's only just recently that a number of projects have been completed to upgrade and bolster our transmission grid."

This upgrade was necessary due to Alberta's growing population and economy, he added.

The line has been under construction for about two years. 

Before that, there were years of public consultations about the controversial power line.