utah History Timeline By 17icrosby Jul 24, 1847 Brigham Young entered the Salt Lake Valley Sep 11, 1857 mountain meadows massacre took place May 10, 1869 continental railroad met at promentory summit Mar 1, 1879 1st telephone demenstration in Salt Lake City Mar 22, 1882 edmunds tucker act was passed which made polyamy illegal Jan 4, 1896 Grover Cleavland signs the bill that making Utah the 45th state
