The flooded bottom of an abandoned silver mine is an unlikely source of hope. But down there in the flickering light, a once worthless metal known as cobalt has sat idle for decades. Now it's one of the most sought after metals in the world and that has many in this town in northern Ontario dreaming of boom times once again.

A century ago, prospectors came to Cobalt, Ont., in search of silver. They found it, and the town boomed. Amid all the silver, miners also found cobalt. So much that they named the town after it. Back then though, it was a mere indicator, a sign that something of actual value was nearby.

Now, all that ignored and discarded cobalt is the town's best hope.

"The potential here is huge," says Frank Basa, chief executive officer of Canada Cobalt Works.

Cobalt the metal has had a spectacular run over the past few years. And now Cobalt the town is poised to cash in.

Frank Basa, chief executive of Canada Cobalt Works, poses outside the 100-year-old Castle Mine. He says cobalt was left behind here when miners hauled out tons of silver in the 1920s and 1930s. (Carly Thomas/CBC)

The metal has become a key component in the electric batteries that power our phones and our cars. Almost all of it is currently mined in the Democratic Republic of Congo in central Africa. Mining there has been plagued with concerns over human rights abuses, child labour and environmental issues.

Basa is convinced there's enough cobalt in the ground under the small town in Northern Ontario to warrant hundreds of millions of dollars in investment.

(Neil Joyes/CBC)

"Everything in here runs cobalt," he says, pointing to the ghostly pink hue that runs through every tunnel wall in the the abandoned Castle Mine. "What they did was they just took the high grade silver and left all the cobalt behind. Nobody wanted cobalt you see."

Basa believes mining the mineral can return this region to its former glory.

An archival photo of an old mine during the silver rush in Cobalt. (©Cobalt Mining Museum)

Back in the 1920s and '30s, this small town on the shores of Lake Timiskaming saw a silver mining rush. It became the economic hub of Ontario.

"They actually had an opera here," says Basa. "They had a ballet, they had streetcars. The hockey team [the Cobalt Silver Kings] started here. The provincial police started here."

Veterans of the silver rush remember those good times. They remember seeing lots of cobalt down in the silver mines, too.

Bill Montgomery made 58 cents an hour when he started working in the mines in the 1940s.

"Everybody was working. Everybody had a dollar in their pocket," he says of the town back then. "Now we have nothing."

There hasn't been an operating mine here since the 1980s. Montgomery has heard a lifetime of promises from promoters and prospectors. After a career of tough work down in the mines, it would take a lot more than talk to get him excited. He just shrugs when asked if there's enough cobalt here to warrant a mine. "It's hard to say, really."

It's not the retired miners job to say, anyway. That task falls to people like Trent Mell. He's CEO of First Cobalt, another company scouring these old mines and the hills outside town.

People in Cobalt pose behind a ton of pure silver drawn from a local mine. (© Cobalt Mining Museum)

Mell has a map of the region on the wall of his office. Little red dots indicate drill sites where they've poked through the Canadian Shield looking for cobalt. He says there's no question it's out there. They named the town Cobalt, after all. The question is whether they can prove there's enough and that it's concentrated in a way that makes it profitable to dig it up and get it to market.

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