Panama Canal, Madden Dam Project, main branch 237 feet from Truck Cavern, contact of wall rock of backed limestone in place (left) and secondary limestone filling (right) marked by flashlight, note the sand filled cracks
name: label: Collection Creator
content: Missionary Catechists of Divine Providence.
label: Collection Creator
content: Massachusetts Institute of Technology (MIT) Civil Engineering Department
label: Collection Creator
content: Underwood and Underwood
setName: label: See more items in
content: Division of Work and Industry Lantern Slide Collection
label: See more items in
content: Division of Work and Industry Lantern Slide Collection / Series 1: Engineering / 1.9: Canals / 1.9.2: Panama Canal
unitdate: label: Date
content: 1930-11-05
container: label: Container
content: Box 37, Item 43
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials
label: Type
content: Photographs