From a small collection of cabins and shacks Diamond City was instantly transformed into a crowded boom town that roared along both night and day. Satellite communities sprouted up on the Gulch—El Dorado, Boulder, Jim Town, and Cement Gulch City. At the crest of the boom ten thousand people lived and worked in Confederate Gulch, but Diamond City dominated the area, and when Meagher County was formed Diamond City was named the county seat.