The Dream Mine, or Relief Mine, is a mine in Salem, Utah, built by John Hyrum Koyle in the 1890s and incorporated in 1909. Koyle prophesied that the mine would provide financial support for members of the Church of Jesus Christ of Latter-day Saints (LDS Church) just before the Second Coming of Jesus Christ. Koyle's prophecies were controversial among leaders of the LDS Church, who excommunicated him in 1948.