Union Mine (Union M.S. 4575; Webb group; Leo claims; Hartman Gold Mining & Milling; Jack White shaft; Alta Vista claims; Evrich Gold Mining Co. Mine), Winifred District (Winnifred District), Union Hills, Phoenix Mts, Maricopa Co., Arizona, USA
Latitude: 33°41'1"N
Longitude: 112°2'45"W
‡Ref.: The Resources of Arizona - A Manual of Reliable Information Concerning the Territory, compiled by Patrick Hamilton (1881), Scottsdale, AZ: 77; USGS Unon Hills map; Bur. Land Mgmt. Mining Dist. sheets; AZ Dept. Min. Resources (ADMR) Union Mine file; Bur. Land mgmt. plat 4575; AZ Dept. Min. Resources (ADMR) Webb group file-map; AZ Dept. Min. Resources (ADMR) "U" file; Wilson, E.D., et al (1934), Arizona lode gold mines and gold mining, AZ Bur. Mines Bull. 137: 165-166; Yale Peabody GNIS database (NOTE: this database is derived from USGS 1:24,000 topographic map data).
A former surface and underground Au mine.
Mineralization is a 3½ foot wide vein.
Workings included a 75 foot deep shaft (1881).
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