Utah History Timeline By LookAtTheBrightside Jul 22, 1847 First two Mormons into the valley Orson Pratt and Erastus Snow Sep 9, 1850 Utah became a territory May 10, 1869 Transcontinental railroad was finished Jul 18, 1871 dedication to the first catholic church in utah Mar 23, 1882 polygamy banned from congress Jan 4, 1896 Utah became a state Aug 10, 1909 Discovery of Ranibow Bridge Feb 17, 1915 state capital is completed
