langs: 16 июля [ru] / july 16 [en] / 16. juli [de] / 16 juillet [fr] / 16 luglio [it] / 16 de julio [es]
days: july 13 / july 14 / july 15 / july 16 / july 17 / july 18 / july 19
Grand Coulee Dam is a concrete gravity dam on the Columbia River in the U.S. state of Washington , built to produce hydroelectric power and provide irrigation water. Constructed between 1933 and 1942, Grand Coulee originally had only two powerhouses. The third powerhouse ("Nat"), completed in 1974 t
#2 Fermi 1
Fermi 1 was the United States ' only demonstration-scale breeder reactor , built during the 1950s at the Enrico Fermi Nuclear Generating Station on the western shore of Lake Erie south of Detroit, Michigan . It used the sodium-cooled fast reactor cycle, in which liquid sodium metal is used as the pr