Fort Harmony , Adventure , Northrup were abandoned and Santa Clara , St. George , Washington , Harrisburg , Heberville , Grafton and Duncans Retreat , were nearly destroyed by the Great Flood of 1862 that followed 44 days of rainfall in January and February 1862 . New Harmony , Springdale and Rockville were founded in 1862 by settlers flooded out of Fort Harmony , Adventure , Northrup and other places in the vicinity . Harrisburg was relocated
Great Flood of 1862
Great Flood of 1862
Washington County, Utah