Los Angeles Times

A California gold mine's toxic legacy: Inside the fight over reopening a treasure trove

Ben Mossman, chief executive of Rise Grass Valley, on the grounds of the closed Idaho- Maryland mine in Grass Valley, California.

GRASS VALLEY, Calif. — Five years ago, Canadian mining executive Ben Mossman came to this little Gold Rush town in the Sierra Nevada foothills, planning to strike it rich.

His company bought the abandoned Idaho-Maryland mine — an 1860s-era treasure trove that once was one of the most productive gold mines in the country.

He has tried to sell the idea of reopening the mine to locals by promising to create more than 300 good-paying jobs in rural Nevada County, where references to the Gold Rush — the Mine Shaft Saloon, the Gold Miners Inn, the rusty ore carts and stamp mills decorating street corners and parks — are everywhere.

"This could be a major mine," Mossman said. "Those aren't easy to find. People are looking all over the place, different countries, all over the world, to find a deposit like this."

For five years, his company, Rise Grass Valley, has been trying to get a permit from Nevada County to start prospecting.

But the people of Grass Valley have overwhelmingly rejected the mine. And Mossman.

The project

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