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Museum Info for Visitors Topaz Stories 2024 Resources About the Topaz Museum Topaz Japanese American WWII Confinement Site Topaz Japanese American WWII Confinement Site Welcome to the Topaz Museum in Delta Utah. Our guiding principles are to preserve the nearby Topaz incarceration site and its World War II history to interpret the impact of Topaz on the Japanese Americans who were confined there their families and the people living in Millard County and to educate people to help prevent what happened during World War II at Topaz from ever happening again. This website contains information about Topaz one of the ten War Relocation Authority confinement sites which was located 16 miles northwest of Delta in central Utah on the lip of the Great Basin. Topaz had a peak population of 8100 and recorded 11212 people processed through the camp while it was in operation from September 11 1942 to October 31 1945.