The first flour mill was built in 1855 by Reed, Wooster, and Lane. At first it was intended for a feed mill but was soon afterwards improved so as to make flour. The steam mill was built in 1856 by Thomas Rickey, though, at time of erection, it was but a small affair compared to what it afterwards would become under the ownership of Hall & Son.
Record showing that lumber was also being sold at this site as early as 1900.
Excerpt - Ledger Dispatch, Nov. 16, 1900
We handle all kinds of building lumber, and the quality and price makes ready sale for it. Call at Amador County Flour Mills, lone.
Information, photographs courtesy of the Amador County Archives, The Historical Marker Database, The Chronicling America Database, and Larry Cenotto, Amador County's Historian