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
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
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