Harshaw Mill

Location

Exact location of Harshaw Mill unknown.

The Hermosa Mill at Harshaw operated 20 stamps, starting in 1879 - 1880, to process a reported 75 tons per day, “the largest mill in Arizona” at the time. The Harshaw Mill ceased major operations in 1890- 91 with only a scattered, small tonnage mining taking place since that time.⁹

---

References

1. Mineral Appraisal of Coronado National Forest, Part 12, Santa Rita Mountains Unit, MLA11-94 (1994). SR 591-609
   http://repository.azgs.az.gov/sites/default/files/dlio/files/nid1813/usbm_mla_011-94.pdf ore via
2. Mining in the Santa Rita and Patagonia Mountains of Arizona, U.S. Department of Interior, 1915. Republished 2014 by Kerby Jackson.
3. Mike Bertram,
4. USGS Mineral Resources Data System - using WGS84 (https://mrdata.usgs.gov/mrds/map-commodity.html#home)
5. Index of Mining Properties in Santa Cruz County by Staton B. Keith, bulletin 191, Arizona Geological Survey, 1975
6. Index of Mining Properties in Pima County by Staton B. Keith, bulletin 189, Arizona Geological Survey, 1974
7. https://www.rvwest.com/article/benson/All_aboard_and_headed_for_Benson
8. History of Smelting in Arizona, by Forrest R. Rickard, 1987; in History of Mining in Arizona, J. Michael Canty and Michael N. Greeley, eds. Published by the Mining Club of the Southwest Foundation, Tucson, Arizona, 1987.
9. History of Mineral Processing in Arizona, by David D. Rabb and Clement K. Chase, 1987; in History of Mining in Arizona, J. Michael Canty and Michael N. Greeley, eds. Published by the Mining Club of the Southwest Foundation, Tucson, Arizona, 1987.