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
Chlorinating house on Mammoth Cave sewer line, 1939
Mammoth Cave National Park; National Park Service
Construction of chlorinating house on Mammoth Cave sewer line, 1939
Mammoth Cave National Park; National Park Service
Stone chlorinating house under construction on Mammoth Cave sewer system, 1939
Mammoth Cave National Park; National Park Service
Environmental assessment for a sewage treatment plant and expanded water storage facilities
National Park Service Water Resources Division; National Park Service
Picture of four workers forming bottom of Imhoff tank, Smokemont Campground, North Carolina
Great Smoky Mountains National Park
Work Order No. B-46 GRSM. Forming bottom of Imhoff tank. Completion report photo.Smokemont Campground Sewer System, II-U-Sewer-7380, Physical Facilities - Utilities - Sewer systems
Excavation for imhoff tank, excavator in the picture, Smokemont Campground, North Carolina
Great Smoky Mountains National Park
Work Order No. B-46 GRSM. Excavating from Imhoff tank. Completion report photo,Smokemont Campground Sewer System, II-U-Sewer-7379, Physical Facilities - Utilities - Sewer systems
View of concrete bottom of Imhoff tank, Smokemont Campground, North Carolina
Great Smoky Mountains National Park
Work Order No. B-46 GRSM. Concrete bottom of Imhoff tank, showing reinforcing and water stop in construction joints. Completion report photo.Smokemont Campground Sewer System, II-U-Sewer-7381, Physical Facilities - Utilities - Sewer systems
View of a chlorinator house on campground, Metcalf Bottoms, Tennessee
Great Smoky Mountains National Park
Work order No. B-35 GRSM. Chlorinator house on top of 25,000 gallon water reservoir. Completion report photo. Metcalf Bottoms Water System, II-C-MB-7371, Physical Facilities - Campgrounds and Picnic Areas - Metcalf Bottoms
View of Imhoff tank, influent pipe, tank, and pump house, Smokemont Campground, North Carolina
Great Smoky Mountains National Park
Work Order No. B-46 GRSM. Imhoff tank, showing 8inch, cast iron influent pipe, tank, and pump house. Completion report photo.Smokemont Campground Sewer System, II-U-Sewer-7384, Physical Facilities - Utilities - Sewer systems
View of Imhoff tank still under construction, Smokemont Campground, North Carolina
Great Smoky Mountains National Park
Work Order No. B-46 GRSM. Imhoff tank showing weir inlet for wet wall and water stop and reinforcing in construction joints for wet wall.Smokemont Campground Sewer System, II-U-Sewer-7382, Physical Facilities - Utilities - Sewer systems
View of Imhoff tank, looking at inlet end, showing concrete baffles, workers at inlet pipe, Smokemont Campground, North Carolina
Great Smoky Mountains National Park
Work Order No. B-46 GRSM. Imhoff tank, looking at inlet end, showing concrete baffles. Completion report photo.Smokemont Campground Sewer System, II-U-Sewer-7383, Physical Facilities - Utilities - Sewer systems
View of concrete block pump house and cast iron drain line in the ditch in foreground, Smokemont Campground, North Carolina
Great Smoky Mountains National Park
Work Order No. B-36 GRSM. Concrete block pump house and 4inch, cast iron drain line for pump house floor drain.Smokemont Campground Sewer System, II-U-Sewer-7385, Physical Facilities - Utilities - Sewer systems
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