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The Old Hole program-resurveying historic boreholes with an EM probe-is leading project geologist Kathy Hattie (left) and area geophysicist Ben Polzer to discoveries like the new zone at the Totten mine. Says Hattie: "Geophysics can explore a large volume of land from a hole." She adds, "A drill hole is an asset. Collar it and don't lose it."