Underground silver, copper & zinc mine operated 1865 - 1957
The mine rapidly became hugely profitable, and in August 1881, Davis sold it to French investors, ociété anonyme des mines de Lexington, led by Georges de la Bouglise and E.Renevey, for $1 million and $2 million in stock. The new owners spent more money to further develop their property. By 1884, a new 60-stamp mill about 500 feet southwest of the mine was crushing the ore.
The Lexington was losing money by 1902 and was shut down. Augustus Heinze leased the Lexington in 1905 and it sporadically produced silver and copper until his business failed in 1913. It was sold to Atlantic Mines, an affiliate of the Anaconda Company, for just over $1 million, the same price paid in 1881.
Anaconda eventually replaced the wooden headframe with one of steel and built a new hoist house, with metal frame and siding. World War I kept the Lexington busy but as soon as the war ended demand for metal and prices dropped. The Lexington Mine was hit soon after the war. It was idle through most of the 1920s and 1930s. The Second World War brought a renewal of activity which led to resumed mining at the Lexington. The Lexington was permanently closed in 1957.