Mine developments spur power line planning: Hydro One to start design work on Thunder Bay-Atikokan-Dryden transmission project.

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The province's power systems manager wants Hydro One to get a jumpstart on power line planning in northwestern Ontario in anticipation of new mines coming into production.

In an Oct. 24 letter, the Independent Electricity System Operator (IESO) is requesting Hydro One start development work for a new transmission line, extending west of Thunder Bay.

Known as the Northwest Bulk Transmission Line, it was identified by the provincial government as a priority in the Long-Term Energy Plan in 2017.

It's a three-phase project that involves running a double circuit 230-kilovolt line from Thunder Bay to Atikokan, from Atikokan to Dryden, and from Dryden to the Manitoba border. The IESO recommends Hydro One starts work on the first two phases.

The scope of planning work involves preliminary design-engineering, cost estimation, public consultation, routing and siting, and environmental assessment.

The IESO isn't putting a timeline on when the construction would begin because, at this point, the extra power capacity isn't needed.

But that could dramatically change if new mines come into production sooner than expected.

In an Oct. 24 news release, the IESO said the need for more power could arise in the early 2020s if there is growth in the mining sector, including the Ring of Fire.

"We look out over the next 20 years as part of our electricity planning," said Leonard Kula, the IESO's vice-president of planning, resources and acquisition, in a statement.

"Taking action today will lay the groundwork so that communities, businesses and Indigenous peoples in the northwest have a reliable supply of electricity in the years ahead when the regional economy grows."

A regional advocacy group applauded the IESO's move, and how it fits into the big-picture power needs for the region.

"The energy task force supports this project and supports it being awarded to Hydro One," co-chair Iain Angus of Common Voice Northwest's Energy Task Force responded by email.

His group has often been...

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