| Lat / long: | 46.33019, -113.27672 |
| Tertiary: | Manganese |
| Other material: | Quartz, Wad |
| Discovery year: | 1887 |
| Operation type: | Underground |
| Development status: | Past Producer |
| First production started: | 1918 |
| MAS | 300390017 |
| DEP | 10172754 |
| Reference | {Deposit:: PRINZ,1967,USGS BULL 1237,P31,34,PL 1}{Deposit:: PARDEE,1922,USGS BULL 725C,P167}{Deposit:: CORRY,A.U.,1941 UNPUB.RPT.ON WHITE HORSE GROUP, *URG MT.}{Deposit:: ANON. UNPUB.RPT. WHITEHORSE MINE IN BACK-UP FILE}{Deposit:: MBM G IC 20, 1957 P.19} |
| Reporter | Montana Bureau Of Mines And Geology Hgm |