Utah history By fireox101 May 25, 1847 mormones enterd Utah Apr 6, 1853 LDS starts to biuld the Salt lake temple Jul 1, 1862 Utah out laws polyigamy Mar 24, 1879 Utah could use firing squade for exacution Dec 9, 1887 Mother lost her parents thru a tragedy when she was 7 or 8. Jan 4, 1896 utah is a state Apr 29, 1906 Copper mining began in Bingham Canyon Oct 13, 1920 Laraine Day was born Jun 17, 1930 Pres. Hoover signed the Smoot-Hawley Tariff Bill, Aug 25, 1945 Japanese-American relocation camp operated near Delta Aug 30, 1952 Duchesne Tunnel completed for irrigation; uranium discovered near Moab Jul 28, 1964 Flaming Gorge Dam completed; began to generate electricity Jan 18, 1970 mormon president died