Archival objects in this container: Aerial view, northeast, of sewage disposal plant detention lagoons (left), clarifiers and bio filters (center), and Imhoff tanks (upper right): photographic negative, 1942 May 06 Aerial view, northwest, of demountable house site, showing occupied houses (right) and those under construction (left): photographic negative, 1942 April 30 Aerial view, east, of plant site: photographic negative, 1941 September 16 Cell unit No. 4, showing chlorinator furnace shells in place and masonry crews at work: photographic negative, 1942 April 20 Construction boarding camp, view of completed tents: photographic negative, 1942 January 09 Aerial view, southeast, of entire plant site, looking from Royson Junction to demountable house site: photographic negative, 1942 April 07 Aerial view, east of plant site, showing demountable houses (upper right) and construction boarding camp (upper center): photographic negative, 1942 March 31