Expeditions & surveys; Railroad surveys; Assiniboine Indians; Gifts; Fort Union (Mont.)
"Fort Union is situated on the eastern bank of the Missouri River, about 2 ¾ miles above the mouth of the Yellowstone. It was built by the American Fur Company in 1830, and has from that time been the principal supply store or depot of that...
Concrete construction; Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.
Portions of the foundation level of Grand Coulee Dam have been poured, others remain to be poured. In the foreground, cooling coils are visible. These were required to maintain the desired temperature for optimum curing of the concrete.