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Sam Mynatt and Arthur Roberts drilling in lateral test shaft at base of Norris Dam. NARA . Scope and content General notes Local identifier Tennessee Valley Authority NARAAuthor Hine Lewis Wickes Photographer File SamMynattandArthurRobertsdrillinginlateraltestshaftatbaseofNorrisDam NARA tif tif File SamMynattandArthurRobertsdrillinginlateraltestshaftatbaseofNorrisDam