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Show i - " I . ' " ' J i l ' i . v.'? MINING PERSONNEL inspect Utah's first underground oil shale mine at Hells Hole Canyon on White River Shale's tract Ua and Ub. Utah's first underground oil shale mined Three hundred tons of mahogany zone shale was removed last week from a partial tunnel in the Hell's Hole Canyon area, south of Bonanza. The White River Shale Oil Corporation is using the shale for testing in the L'nion B pilot retort facility in Los Angeles, Calif. This is the first underground oil shale mining operating in Utah and is a prelude to White River's plan to develop the world's largest underground un-derground mining process on Federal Lease Tracts Ua and Ub during the next two decades. "Silence is a friend who never betrays." Confucius |