Waterline partly finished, 1936
Mammoth Cave National Park; National Park Service
Pipeline from spring to hotel
Mammoth Cave National Park; National Park Service
Showing connection in pump house, 1937
Mammoth Cave National Park; National Park Service
Pouring the top of the reservoir, 1936
Mammoth Cave National Park; National Park Service
Pipeline for cabins at Mammoth Cave hotel, 1936
Mammoth Cave National Park; National Park Service
Pipeline for cabins at Mammoth Cave hotel, 1936
Mammoth Cave National Park; National Park Service
Pouring the top of the reservoir, 1936
Mammoth Cave National Park; National Park Service
Pipeline for cabins at Mammoth Cave hotel, 1936
Mammoth Cave National Park; National Park Service
Pouring the top of the reservoir, 1936
Mammoth Cave National Park; National Park Service
Enrollees from no. 3 digging sewer line, 1937
Mammoth Cave National Park; National Park Service
Manhole concrete on hotel cabins sewer line, 1937
Mammoth Cave National Park; National Park Service
Pouring the top of the reservoir, 1936
Mammoth Cave National Park; National Park Service
Enrollees from no. 3 digging sewer line, 1937
Mammoth Cave National Park; National Park Service
Excavating for the reservoir at Three Springs, 1937
Mammoth Cave National Park; National Park Service
Excavating for the reservoir at Three Springs, 1937
Mammoth Cave National Park; National Park Service
Excavating for the reservoir at Three Springs, 1937
Mammoth Cave National Park; National Park Service
Waterline nearing completion, looking toward the Wilson house, 1936
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
Waterline nearing completion, looking toward the Wilson house, 1936
Mammoth Cave National Park; National Park Service
Waterline nearing completion, looking toward the Wilson house, 1936
Mammoth Cave National Park; National Park Service
Construction, digging ditch at central office, 1937
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
Sewer drain ditch at the central garage, 1936
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
Ky np-1 digging waterline near central office, 1936
Mammoth Cave National Park; National Park Service
Reconnaissance and investigation, water register in Cedar Sink, 1936
Mammoth Cave National Park; National Park Service
Manhole in Mammoth Cave hotel sewage line, 1937
Mammoth Cave National Park; National Park Service
Drainage ditch at the central garage and repair shop, 1936
Mammoth Cave National Park; National Park Service
Fissure in the rock of the ditch line, 1936
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
Enrollees from no3 digging sewer line in residential area
Mammoth Cave National Park; National Park Service
Digging ditch for waterline through section of woods, ky np-1
Mammoth Cave National Park; National Park Service
Sewage ditch for central garage and utility shop, 1936
Mammoth Cave National Park; National Park Service
Waterline that goes from spring to hotel at Mammoth Cave
Mammoth Cave National Park; National Park Service
Enrollees covering sewage disposal line from Mammoth Cave hotel, 1937
Mammoth Cave National Park; National Park Service
Tank frame work being torn to build tower for fire observation, 1937
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
Concrete septic tank to the Mammoth Cave hotel sewer line, 1937
Mammoth Cave National Park; National Park Service
Showing depth of Imhoff tank of hotel sewage disposal, 1937
Mammoth Cave National Park; National Park Service
Tank frame work being torn to build tower for fire observation, 1937
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
Carpenter building form for Imhoff basin sewage disposal line in residential area
Mammoth Cave National Park; National Park Service
Clearing rock in preparation for transplanting shrubs and sod, 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
Pouring concrete at Three Springs for the fifty-thousand gallon reservoir, 1937
Mammoth Cave National Park; National Park Service
Looking down the center of waterline ditch before completion, 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
Np-4 boy smoothing new concrete basin to sewage line, Mammoth Cave hotel
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
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