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Southeast Nebraska mining program could soon be the only Niobium mine in America

Southeast Nebraska mining program could soon be the only Niobium mine in America NioCorp's crew of about 15 people near Elk Creek is laying the groundwork for harvesting what they say is the “largest niobium deposit in North America.”

A mining program in rural Johnson County is marking a major milestone, as part of a larger effort to harvest critical underground resources from one of the only mines of its kind on the continent.

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