Built 1928 Designated NHL February 16, 2000 Area 2 ha Nearest city Silverton | NRHP Reference # 00000262 Opened 1928 Added to NRHP 16 February 2000 | |
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Architect Arthur J. Weinig, Metallurgy Similar Dexter Cabin, Hornbek House, Ouray City Hall and Walsh Lib, American National Bank Buil, Pike's Stockade | ||
The Shenandoah-Dives Mill or Mayflower Mill is an intact and functional but inactive historic ore mill two miles east of Silverton, Colorado, United States. The mill was built in 1929 to recover gold, silver, lead, zinc, and copper from ore mined at the Mayflower mine and brought to the mill by an aerial tramway.
The mill recovered metals from the ore by gravity separation and by selective flotation. The sulfide ore minerals were concentrated by froth flotation, an innovative method in the early twentieth century that allowed processing of ores that would previously have been too difficult for feasibility. The original mill equipment is still in working order. It is the only intact and functional mill of its kind in Colorado.
It was declared a National Historic Landmark in 2000. The mill is owned by the San Juan County Historic Society, which staffs an information and gift shop at the mill under the name Mayflower Mill. The mill is open for self-guided tours in the summer months.