Marker: Charles D. Poston -“The Father of Arizona” copper plaque
Location: Pinal County Historical Society Museum 715 South Main Street Florence, Pinal County, Arizona 33.024859, -111.387224
Historical Significance: This native copper plate was erected by the State of Arizona in conjunction with Maricopa Chapter, NSDAR, as the Poston Butte pyramid was completed, twenty‑three years after Poston’s death. The copper plate was provided by New Cornelia Copper Company with General John C. Greenway acting as General Manager. Arizona Governor George W. P. Hunt and George H. Kelly, State Historian, attended the dedication.