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Workers on road construction equipment Mammoth Cave National Park; National Park Service
Workers on road construction equipment Mammoth Cave National Park; National Park Service
Road grader and tractor grading road Mammoth Cave National Park; National Park Service
Tractor and grader leveling road Mammoth Cave National Park; National Park Service
Yellowstone photo album 7, page 102 Yellowstone National Park
Yellowstone photo album 8, page 122 Yellowstone National Park
Yellowstone photo album 8, page 157 Yellowstone National Park
Grading cabin parking lot, 1941 Mammoth Cave National Park; National Park Service
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Circa 1941
Construction, grading courts in front of park service utility garage, 1938 Mammoth Cave National Park; National Park Service
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1938-06-08
Construction, Three Springs Road on which grading is almost completed, 1938 Mammoth Cave National Park; National Park Service
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1938-06-10
Construction, using grader to widen driveway at new entrance hotel, 1939 Mammoth Cave National Park; National Park Service
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1939-09-12

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