Dome ( ) is a ghost town located in Yuma County , in southwestern Arizona , United States . Originally Swiveler 's Station , 20 miles east of Fort Yuma , on the Butterfield Overland Mail route , a post office was established here in 1858 . It was first under the name of Gila City the nearby boomtown 1 1/2 mile west of Swiveler 's but the post office closed July 14 , 1863 , after most of the town was swept away in the Great Flood of 1862 , and then abandoned for the La Paz gold rush along the Colorado River . After the railroad passed by the site and an attempt to do large scale mining of the placers began , a new post office was established as " Dome " in 1892 but soon closed when the attempt failed . Subsequently it opened and closed several times before finally closing in 1940
Great Flood of 1862
Great Flood of 1862
Dome, Arizona