The circa 1890 Modoc Mill is a good example of industrial architecture associated with Boulder County’s mining history. This concentration mill of wood and metal reaches four stories in height. The uppermost story of hewn logs received the ore. Here gravity bins held the ore until it was fed into a crusher and the stamping apparatus below.
The 18 foot high stamping apparatus, manufactured by Griffen and Wedge of Zanesville, Ohio, consists of 30 stamps each weighing 950 pounds that are arranged in three banks of ten. Both the mill and nearby mine closed for the last time in 1920. The property is associated with the Mining Industry in Colorado Multiple Property Submission.