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Yellowstone photo album 31, page 187 Yellowstone National Park
View on map 
Circa 1936
View series 
Yellowstone photo album 31, page 186 Yellowstone National Park
View on map 
Circa 1936
View series 
Yellowstone photo album 31, page 191 Yellowstone National Park
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Circa 1936
View series 
Waterworks, sewage disposal tank completed, 1942 Mammoth Cave National Park; National Park Service
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1942-06
Waterworks, sewage disposal tank completed, 1942 Mammoth Cave National Park; National Park Service
View on map 
1942-06
Yellowstone photo album 31, page 189 Yellowstone National Park
View on map 
Circa 1936
View series 
Yellowstone photo album 24, page 115 Yellowstone National Park
View on map 
Circa 1908
View series 
Yellowstone photo album 31, page 190 Yellowstone National Park
View on map 
Circa 1936
View series 
View of present manhole No. 13 looking toward new chlorinating house, including present imhoff tank and sludge bed, 1940 Mammoth Cave National Park; National Park Service
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1940-02-15
Imhoff tank construction, 1941 Mammoth Cave National Park; National Park Service
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1941-06
Imhoff tank construction, 1941 Mammoth Cave National Park; National Park Service
View on map 
1941-06
Imhoff tank construction, 1941 Mammoth Cave National Park; National Park Service
View on map 
Circa 1941
Imhoff tank under construction, 1941 Mammoth Cave National Park; National Park Service
View on map 
Circa 1941
Imhoff tank under construction, 1941 Mammoth Cave National Park; National Park Service
View on map 
Circa 1941
Imhoff tank under construction, 1941 Mammoth Cave National Park; National Park Service
View on map 
Circa 1941
Imhoff tank under construction, 1941 Mammoth Cave National Park; National Park Service
View on map 
Circa 1941
Imhoff tank under construction, 1941 Mammoth Cave National Park; National Park Service
View on map 
Circa 1941
Imhoff tank under construction, 1941 Mammoth Cave National Park; National Park Service
View on map 
Circa 1941
Construction, enrollees pouring imhoff tank, 1941 Mammoth Cave National Park; National Park Service
View on map 
Circa 1941
Construction, enrollees pouring imhoff tank, 1941 Mammoth Cave National Park; National Park Service
View on map 
1941-12
Construction, enrollees pouring imhoff tank, 1941 Mammoth Cave National Park; National Park Service
View on map 
1941-12
Construction, enrollees pouring imhoff tank, 1941 Mammoth Cave National Park; National Park Service
View on map 
1941-12
Construction, imhoff tank nearing completion, 1942 Mammoth Cave National Park; National Park Service
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Circa 1941
Tree roots exposed by ditching for sewer line Mammoth Cave National Park; National Park Service
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Tree roots exposed by ditching for sewer line Mammoth Cave National Park; National Park Service
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Construction, sludge bed at imhoff tank, 1942 Mammoth Cave National Park; National Park Service
View on map 
Circa 1941
Sewage disposal system at campground Blue Ridge Parkway Virginia, Section 1M.
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1965-07-29
Sewage disposal plant (after construction), 1950 Mammoth Cave National Park; National Park Service
View on map 
Circa 1950
Sewage disposal plant (after construction), 1950 Mammoth Cave National Park; National Park Service
View on map 
Circa 1950
Sewage disposal plant (after construction), 1950 Mammoth Cave National Park; National Park Service
View on map 
Circa 1950
Sewage disposal plant (before construction), 1950 Mammoth Cave National Park; National Park Service
View on map 
Circa 1950
Sewage disposal system at campground Blue Ridge Parkway Virginia, Section 1M.
View on map 
1965-07-29
Sewage disposal system at campground Blue Ridge Parkway Virginia, Section 1M.
View on map 
1965-07-29
Sewage system rehabilitation, Fancy Gap residential area, Blue Ridge Parkway Blue Ridge Parkway Utilities, Fancy Gap Residences, Virginia, Section 1V.
1958-05-05
Construction, sewer line trench completed at superintendents residence, 1940 Mammoth Cave National Park; National Park Service
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Circa 1940
Construction, key area trunk sewer station 37+00, 1939 Mammoth Cave National Park; National Park Service
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1939-05-28
Construction, key area trunk sewer station 40+50, 1939 Mammoth Cave National Park; National Park Service
View on map 
1939-03-28
Start of construction of forms for Imhoff tank, 1941 Mammoth Cave National Park; National Park Service
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1941-06
Mabry Mill water and sewage plan and profile Blue Ridge Parkway Virginia, Section 1T.
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1972-06
Construction, sewer line trench in place at superintendents residence, 1940 Mammoth Cave National Park; National Park Service
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Circa 1940
Enrollees working in sewer trench for new sewer system Mammoth Cave National Park; National Park Service
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Construction, excavation for sewage disposal in picnic area, 1940 Mammoth Cave National Park; National Park Service
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1940-09-05
Aerial view of Flamingo sewage area Everglades National Park; National Park Service Distant aerial view of Flamingo sewage area.
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1958
Construction, hotel sewer, looking down hill from station 3+75, 1938 Mammoth Cave National Park; National Park Service
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1939-11-10
Construction, location of proposed imhoff tank and sludge bed, 1940 Mammoth Cave National Park; National Park Service
View on map 
1940-02-15
Construction, location of proposed imhoff tank and sludge bed, 1940 Mammoth Cave National Park; National Park Service
View on map 
1940-02-15
Tree roots exposed in ditching for sewer line, cabin unit No. 1 Mammoth Cave National Park; National Park Service
View on map 
Tree roots exposed by ditching for sewer line, protected with burlap wrapping Mammoth Cave National Park; National Park Service
View on map 
Tree roots exposed by ditching for sewer line, protected with burlap wrapping Mammoth Cave National Park; National Park Service
View on map 
Tree roots exposed by ditching for sewer line, protected with burlap wrapping Mammoth Cave National Park; National Park Service
View on map 
Yellowstone photo album 31, page 187
Yellowstone photo album 31, page 186
Yellowstone photo album 31, page 191
Waterworks, sewage disposal tank completed, 1942
Waterworks, sewage disposal tank completed, 1942
Yellowstone photo album 31, page 189
Yellowstone photo album 24, page 115
Yellowstone photo album 31, page 190
View of present manhole No. 13 looking toward new chlorinating house, including ...
Imhoff tank construction, 1941
Imhoff tank construction, 1941
Imhoff tank construction, 1941
Imhoff tank under construction, 1941
Imhoff tank under construction, 1941
Imhoff tank under construction, 1941
Imhoff tank under construction, 1941
Imhoff tank under construction, 1941
Imhoff tank under construction, 1941
Construction, enrollees pouring imhoff tank, 1941
Construction, enrollees pouring imhoff tank, 1941
Construction, enrollees pouring imhoff tank, 1941
Construction, enrollees pouring imhoff tank, 1941
Construction, imhoff tank nearing completion, 1942
Tree roots exposed by ditching for sewer line
Tree roots exposed by ditching for sewer line
Construction, sludge bed at imhoff tank, 1942
Sewage disposal system at campground
Sewage disposal plant (after construction), 1950
Sewage disposal plant (after construction), 1950
Sewage disposal plant (after construction), 1950
Sewage disposal plant (before construction), 1950
Sewage disposal system at campground
Sewage disposal system at campground
Sewage system rehabilitation, Fancy Gap residential area, Blue Ridge Parkway
Construction, sewer line trench completed at superintendents residence, 1940
Construction, key area trunk sewer station 37+00, 1939
Construction, key area trunk sewer station 40+50, 1939
Start of construction of forms for Imhoff tank, 1941
Mabry Mill water and sewage plan and profile
Construction, sewer line trench in place at superintendents residence, 1940
Enrollees working in sewer trench for new sewer system
Construction, excavation for sewage disposal in picnic area, 1940
Aerial view of Flamingo sewage area
Construction, hotel sewer, looking down hill from station 3+75, 1938
Construction, location of proposed imhoff tank and sludge bed, 1940
Construction, location of proposed imhoff tank and sludge bed, 1940
Tree roots exposed in ditching for sewer line, cabin unit No. 1
Tree roots exposed by ditching for sewer line, protected with burlap wrapping
Tree roots exposed by ditching for sewer line, protected with burlap wrapping
Tree roots exposed by ditching for sewer line, protected with burlap wrapping
Sort (Relevance)
Items per page (50):
Page 1 of at least 4
About 190 Items

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