The bottom of the upside down well in Mammoth Cave near snowball dining hall, 1936
Mammoth Cave National Park; National Park Service
Showing the area tourist cabins at Mammoth Cave hotel before landscaping, 1936
Mammoth Cave National Park; National Park Service
Waterline nearing completion, looking toward the Wilson house, 1936
Mammoth Cave National Park; National Park Service
Pouring the top of the reservoir, 1936
Mammoth Cave National Park; National Park Service
Waterline nearing completion, looking toward the Wilson house, 1936
Mammoth Cave National Park; National Park Service
Pipeline for cabins at Mammoth Cave hotel, 1936
Mammoth Cave National Park; National Park Service
Carpenter building form for Imhoff basin sewage disposal line in residential area
Mammoth Cave National Park; National Park Service
Man at left is standing at approximate center of proposed building at the hotel, sewage disposal, 1937
Mammoth Cave National Park; National Park Service
Excavating for the reservoir at Three Springs, 1937
Mammoth Cave National Park; National Park Service
Carpenter building form for Imhoff basin sewage disposal line in residential area
Mammoth Cave National Park; National Park Service
Enrollees of ky np-1 at work on sewer line, 1937
Mammoth Cave National Park; National Park Service
Pouring the top of the reservoir, 1936
Mammoth Cave National Park; National Park Service
Excavating for the reservoir at Three Springs, 1937
Mammoth Cave National Park; National Park Service
Enrollees working on septic tank to sewage disposal line from Mammoth Cave hotel, 1937
Mammoth Cave National Park; National Park Service
Enrollees from no. 3 digging sewer line, 1937
Mammoth Cave National Park; National Park Service
Waterline nearing completion, looking toward the Wilson house, 1936
Mammoth Cave National Park; National Park Service
Man at left is standing at approximate center of proposed building at the hotel, sewage disposal, 1937
Mammoth Cave National Park; National Park Service
Pouring concrete at Three Springs for the fifty-thousand gallon reservoir, 1937
Mammoth Cave National Park; National Park Service
Crew from np-4 building dam to hold out water while concrete head wall is being built to hold sewage line
Mammoth Cave National Park; National Park Service
Pouring the top of the reservoir, 1936
Mammoth Cave National Park; National Park Service
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