Gold, Sapphires, Dams

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Helena historian and geologist Martin Landry will present Gold, Sapphires, and Dams , a history of the gold and sapphire dredging operation at Eldorado Bar on the Missouri River northeast of Helena. Owned by the Perry-Schroeder Mining Company, the dredge was subsequently used in the construction of Canyon Ferry Dam and in dredging operations in South Carolina and Colorado.