Utah History By 16sdeem Jul 4, 1847 Brigham Young entered Utah valley Jul 17, 1853 Walker War The Walker War with the Ute Indians over slavery begins May 10, 1869 The Golden Spike The golden spike was hammered in Mar 23, 1882 Congress outlawed polygamy Jan 4, 1896 Utah became a state May 1, 1900 Scofield Mine disaster May 22, 1910 Salt Lake City has Earthquake Oct 13, 1920 Loraine Day was born Loraine Day was born in Rosselvelt, Utah in this day May 31, 1983 Record Snowfall brings flooding Jan 4, 1996 utah celebrates 100th year of being a state Mar 12, 2003 Elizabeth Smart was found alive in Salt Lake City May 25, 2011 Man who kiddnapped Elizabeth Smart went to jail.