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Gully check dams to prevent erosion, Queen Fields Great Smoky Mountains National Park Gully check dams.Erosion Control; Queen Fields, IV-Z-3215, Miscellaneous
View from bottom of gully check dams, Queen Fields Great Smoky Mountains National Park Gully check dams.Erosion Control; Queen Fields, IV-Z-3216, Miscellaneous
Soil and moisture conservation, trees in background Mammoth Cave National Park; National Park Service
Soil and moisture conservation, trees in background Mammoth Cave National Park; National Park Service
Soil and moisture conservation, trees in background Mammoth Cave National Park; National Park Service
Soil and moisture conservation, trees in background Mammoth Cave National Park; National Park Service
Soil and moisture conservation, trees in background Mammoth Cave National Park; National Park Service
Soil and moisture conservation, hilly field Mammoth Cave National Park; National Park Service
Yellowstone photo album 4, page 84 Yellowstone National Park
Yellowstone photo album 9, page 45 Yellowstone National Park
Yellowstone photo album 8, page 3 Yellowstone National Park
Yellowstone photo album 8, page 49 Yellowstone National Park
Yellowstone photo album 6B, page 6 Yellowstone National Park

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