MLA doubtful Taltson project will help N.W.T. achieve its climate goals

The N.W.T. has been relying on the Taltson expansion project to hit its carbon reduction targets for years. But as 2030 looms closer, Yellowknife North MLA Rylund Johnson says it's "really unlikely" it'll be built in time.

Expansion project relies on fluctuating mining industry to buy power

Rylund Johnson, MLA for Yellowknife North, says it's 'really unlikely' construction on the Taltson will be complete by the time the territory is supposed to hit its carbon target. He also doesn't believe it'll help reduce emissions — because the diamond mines that were expected to connect to it are winding down. (Mario De Ciccio/Radio-Canada)

An N.W.T. MLA says an ambitious energy project likely won't be built in time for the N.W.T. to meet its greenhouse gas emission reduction targets. 

The first phase of the Taltson hydro expansion aims to build a new 60-megawatt power plant next to the existing Twin Gorges facility northeast of Fort Smith and then connect it to the North Slave Hydro System either through or around Great Slave Lake. 

The territory has been relying on the project to come online by 2030 to meet its reduction targets but, as Yellowknife North MLA Rylund Johnson pointed out at the Legislative Assembly last month, it hinges on a number of things — including three more mines coming online and agreeing to buy power. 

"The mining world is boom and bust, and it's hard to get three mines to open, let alone sign on and commit to purchasing power in the long-term," Johnson said in an interview. He said it's "really unlikely" construction will be done by 2030, and it's a toss up whether construction will have begun by then.

A photo of the existing 18 megawatt Twin Gorges power plant on the Taltson River. Phase one of the expansion would built a 60-megawatt expansion next to it. (Submitted by Darren Campbell)

Andrew Stewart, N.W.T.'s director of strategic energy, said the expansion will require two or three modestly-sized mines to sign on as customers. He said the "prospects of new mining developments are certainly there" and the territory is looking at nine candidates: Yellowknife City Gold, Yellowknife Gold, Nechalacho mine, Pine Point, NICO, Colomac, Ekati mine, Gahcho Kue mine and Courageous Lake.

However, he also noted the distance to the territory's three operating diamond mines, deep in the Slave Geological Province (Ekati, Gahcho Kue and Diavik) would make for a "challenging" business case and the expansion would require customers close to existing infrastructure. 

Support from Ottawa 'exciting' says department

Phase one of the Taltson expansion is slated to cost $1.5 billion. 

Stewart said the territory continues to use the $18 million it secured in the 2019 federal budget to investigate the feasibility of the project. He said there's enough money to get to a regulatory application, but the territory is going to need between $25-30 million more to get through a multi-year regulatory approval process. 

"We don't have enough to get that construction decision," he said. 

Early last month, Cabin Radio reported that Dominic LeBlanc, the federal infrastructure minister, said he saw a "very clear path" to funding the expansion. 

Andrew Stewart is the N.W.T.'s director of strategic energy. He said there's still a lot of work to do, but that the territory is on a path to having the Taltson expansion built by 2030. (Submitted by Darren Campbell)

Stewart said the federal government has been putting its money where its mouth is for the past number of years by investing in the feasibility stage of the project, and that it's "very exciting" to hear Ottawa is supportive.

When asked whether the Taltson would be built by 2030, Stewart said: "That's the path we're on." He also said there are lots of questions left to be answered, and the support of Indigenous partners, as well as the territorial and federal governments, will be critical moving forward.

Diamond mines slated to close before Taltson is built

The N.W.T. has to reduce its greenhouse gas emissions by 193 kilotonnes in order to hit its 2030 reduction target — on top of actions laid out in the territory's 2019-2022 Energy Action Plan.

Infrastructure Minister Diane Archie told the Legislative Assembly on May 26 the territory would not update its target, which has fallen out of line with Canada's commitment. (That's a change from when Environment Minister Shane Thompson last year said the N.W.T. wasn't saying "yes or no" to updating the goals).

The territory says the first phase of the expansion is expected to reduce greenhouse gas emissions by 227 kilotonnes a year by reducing or displacing diesel with hydropower at new and existing mines. But Johnson says that is based on an old vision of supplying power to diamond mines — which, he noted, is no longer part of the conversation. 

The territory's three diamond mines will all, currently, come to an end by 2030.

An aerial view of the Ekati mine, 300 kilometres northeast of Yellowknife. It's one of three diamond mines in the N.W.T. that are winding down — its lifespan ends in 2029. (Dominion Diamond Corporation)

"All of our documents pretend like we're building the Taltson by 2030 and the diamond mines will be hooked up, so we're going to get a giant reduction. And I even assume they're telling the feds that, which is why the feds are interested," said Johnson.

What the Taltson expansion will do, he said, is provide future mines that may have used diesel with hydro power instead. 

Archie declined to do an interview with CBC News. When CBC News asked Archie via email what the territory would do to meet its goals if the Taltson was not built on time, a spokesperson re-directed the questions to the infrastructure department saying they were "operational in nature."

A spokesperson for the department said the upcoming energy action plan will introduce new initiatives and measures to keep the territory "on track."

A missed opportunity

Back when the Taltson expansion was first being conceptualized, Johnson said it was probably true that it could have significantly reduced the territory's greenhouse gas emissions and created one of the greenest mining economies in the world. 

Now, he said, the territory is two decades too late. 

"It's like they've just kind of given up. They had Taltson as this silver bullet for a long time." he said.

"It's now kind of realizing that with diamond mines winding down, it's not going to be. And they seem to have no plans to do anything else."


Liny Lamberink


Liny Lamberink is a reporter for CBC North. She moved to Yellowknife in March 2021, after working as a reporter and newscaster in Ontario for five years. She can be reached at