Utah History By GoatMan Jan 24, 1847 First Mormon pioneers arive in Utah. Sep 7, 1857 Mountain Medows Masacare. May 10, 1869 The golden spike is driven into the ground. Mar 1, 1879 First telephone service Mar 23, 1882 The Edmonds Act is established Jan 4, 1896 Utah becomes a state Aug 15, 1909 Rainbow Bridge is found Jan 1, 2002 The Olypics