Archival objects in this container: Construction of temporary administration building, 1941 September 23 Aerial view of Basic Magnesium plant site shortly after excavation began, 1941 October 08 Aerial view looking east, showing temporary rail siding and water storage tanks south of Basic Magnesium, 1941 October 08 Aerial view looking west, showing the temporary administration building, 1941 October 08 Aerial view looking north, showing plant site, temporary administration building, temporary water tanks, and railroad siding, 1941 October 08 Construction of temporary general storage warehouse, 1941 October 08 Aerial view looking southwest, showing temporary warehouses and addition of drafting room to the temporary administration building, 1941 October 29 Aerial view of Basic Magnesium plant excavation site and administration building, 1941 October 29 Construction of electrolysis building no. 1, showing excavation, footing forms, and reinforcing steel, 1941 November 04 Concrete being poured for the footing of electrolysis building no. 1, 1941 November 04 Aerial view of Basic Magnesium temporary administration building, 1941 November 10 Track laying on railroad spur no. 10 from Royson, Nevada to plant site, 1941 November 21 Pouring and finishing concrete floor of temporary brick grinding building, 1941 November 25 Aerial view of construction activities at Basic Magnesium, 1941 December 01 Aerial view of temporary camp for Basic Magnesium construction workers looking northeast toward Frenchman Mountain, 1941 December 08 Aerial view looking east, showing construction progress on chlorine cell buildings, electrolysis units, temporary brick grinding building, and railroad spurs, 1941 December 08 Aerial view looking northeast toward Lake Mead, Basic Magnesium plant site, and temporary building camp, 1941 December 08 Machine excavation for electrical distribution tunnel, 1941 December 17 Forms for footings of chlorinator units in chlorination building no. 1, 1941 December 17 Looking northwest from spur no. 14, showing start of work on permanent warehouse group, 1941 December 18 Looking northeast, showing concrete footings poured and pier reinforcing steel in place for chlorine cell building no. 1, 1941 December 22 Progress on tent platforms for temporary building camp, 1941 December 29 Installation of the first double spindle dry grinder in the temporary brick grinding building, 1941 December 29 Pouring concrete in octagonal base of chlorination cell in cell unit no. 3, 1941 December 29 Aerial view of Lake Mead water intake for Basic Magnesium, 1941 December 30