St. Thomas, Nevada
St. Thomas, Nevada is a ghost town in Clark County, Nevada, near where the Muddy River flows into the Colorado River. St. Thomas was purchased by the US Federal Government and abandoned as the waters of Lake Mead submerged the town in the 1930s. However, as the level of Lake Mead dropped in the 2000s, the ruins of the town resurfaced. It is now located within the Lake Mead National Recreation Area.
The town was founded by Mormon settlers led by Thomas Smith in 1865. With a population of about 500 at its peak, St. Thomas became an established town of farms and businesses, and was at one point the county seat of Pahute County. The frontier settlement is noted as the endpoint of explorer John Wesley Powell's first Colorado River expedition, the Powell Geographic Expedition of 1869.
The Mormons abandoned St. Thomas in February 1871, as a land survey shifted the state line of Nevada one degree longitude to the east, placing all of the Mormon settlements known as the Muddy Mission in Nevada instead of Arizona or Utah. The state of Nevada then attempted to collect taxes for previous years payable only in gold from the residents. They chose to leave without paying in 1871.  The Mormons moved to Utah, where many of them founded new towns in Long Valley (present day Glendale, Orderville, and Mount Carmel).
When the Mormons left in 1871, others claimed their abandoned properties. One of the few to remain was Daniel Bonelli of St. Thomas, who farmed, mined and owned Bonelli's Ferry on the Colorado River at Junction City later Rioville. After being deserted by most of its first settlers, new Mormon settlers came to the St. Thomas and other places in the area in the 1880s.
The ruins of St. Thomas, which became visible after the water level in Lake Mead lowered,  are protected by the National Park Service as a historic site. The cemetery was relocated to Overton, Nevada where there is a St. Thomas interpretive center with a staff archaeologist doing on-going research into the history and settlement of the Muddy River.
The novel Lords of St. Thomas (GWP, 2018) by Jackson Ellis tells the story of the last family to vacate the flooded town in 1938 following construction of the Boulder Dam. The book's protagonist, Henry Lord, is based on Hugh Lord. 
The novel The Desert Between Us, (University of Nevada Press, 2020) by Phyllis Barber tells the story of early Mormon pioneers, polygamy, the U.S. government’s decision to open a road to California, and camels. 
- Pah-Ute County, Arizona
- Potosi, Venezuela
- St. Thomas Memorial Cemetery
- Mormon Island, California, another former Mormon community submerged by a man-made lake
- McClintock, James H. Mormon settlement in Arizona; a record of peaceful conquest of the desert, p.122. Harvard University, 1921
- "Lake Mead National Recreation Area - St. Thomas (U.S. National Park Service)". Nps.gov. Retrieved 2010-02-28.
- "St. Thomas Nevada, A - Sometimes - Underwater Ghost Town". Lake Mead NRA - SunsetCities.com. Archived from the original on 15 April 2012. Retrieved 26 March 2012.
- Robison, Vernon New Historical Novel Tells Story Of Evacuation Of St. Thomas
- Media related to St. Thomas, Nevada at Wikimedia Commons
- St. Thomas information - National Park Service