Canadian Manufacturing

$25M transmission line upgrade complete in southwestern Ontario

by Cleantech Canada Staff   

Cleantech Canada
Operations Energy hydro one LTEP Ontario utilities

Upgrade to 70-kilometre stretch of transmission line allow for 500 megawatts of renewable generation to be connected

TORONTO—Hydro One Inc. said the $25-million upgrade to a transmission line between a pair of electricity transformer stations in southwestern Ontario is complete.

The project to upgrade the 70-kilometre stretch of transmission line between the Lambton transformer station, south of Sarnia, Ont., and the Longwood transformer station west of London, Ont., was undertaken as part of Ontario’s Long-term Energy Plan (LTEP).

“The upgrade of the transmission line in the Lambton area increases the capacity for new renewable projects while strengthening the reliability of the transmission line,” Hydro One president and CEO Carm Marcello said in a release. “Hydro One continues to make valuable investments in the transmission infrastructure that will serve the people of Ontario for many years to come.”

According to Hydro One, 36 tower foundations were refurbished, while Aluminum Conductor Steel Supported (ACSS) conductor, a composite stranded line, for the first time in Hydro One’s transmission system.


Insulators were also replaced along the line.

The upgrades allow for approximately 500 megawatts of renewable energy generation to be connected, Hydro One said.

Work started on the upgrade in April 2013.


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