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
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