20th century By ms12983 1900 Scofield Mine Disaster 1905 Uintah Indian Reservation is opened to white settlement 1906 Open-pit copper mining begins in Bingham canyon 1908 Natural bridges is Utah's first national monument 1912 Alma Richards is first Utahn to win an Olympic gold metal 1918 Zion National Park is Utah's first national park 1920 The Nineteenth Amendment gives the vote to U.S. women 1922 The First radio transmission in Utah is heard 1923 Posey War 1929 The Great Depression begins