The data below represent everything available in the MBMG Abandoned and Inactive Mines (AIM) database.

Sites Table
AIM Id Name Alternate Name District County
GR003069 DEWEY MINE GRANITE
MRDS AMLI MILS Latitude Longitude Datum
300390188 46.8272 -113.3431
Township Range Section QSection UTM Northing UTM Easting UTM Zone UTM Datum
12N 14W 3 ACBD 5188411 321292 12
Average Elevation Elev Units Land Owner 250K Quad 100K Quad 24K Quad
F BUTTE MISSOULA EAST ELEVATION MOUNTAIN
Property Type Update Date Who Updated
LODE 2/14/1995
Commodities Table
Commodities Identified
COPPER
GOLD
SILVER
Agency Info Table
Information
Agency: BLM
Region District: BUTTE
Ranger District:
Forest Service Tract:
Watershed Code:
Forest or Resource Area: GARNET
Owner: P
Impact: U
Report: Dewey (GR003069) The Dewey workings, located a short distance west of the ghost town, consist of 2 caved shafts, prospect pits, and multiple dumps. Surface disturbance covers several acres and is continuous with that on adjoining claims. Host rock is granodiorite; gangue mineralogy appears to be a white, vuggy quartz. Ore minerals reported in the oxidized zone included limonite, scant copper minerals, and trace manganese (Pardee, 1918). In the sulfide zone, ore minerals included pyrite, chalcopyrite, and tetrahedrite (Pardee, 1918). The only apparent sign of mineralization on the dumps in 1994 was limonite staining. Ore extracted from this claim averaged 3.5 ounces gold, 6.5 ounces silver, and 2% copper per ton (Pardee, 1918). The Dewey was discovered and developed relatively early in the history of this mining district. In the period 1915-1916, this mine produced $100,000.00 gross (Pardee, 1918). The Dewey workings lie on a patented claim; there appears to be no water component at this location. Maps showing longitudinal sections and underground workings can be found in USGS Bulletin 660-F (Pardee, 1918).
Screening Criteria Table
Information
Mill Tailings: N
Adit Discharge: N
Metal Leaching: N
Water Erosion: N
Residence: N
Hazardous Materials: N
Open Adit: N
Visit: Y
Comments: MBMG GEOLOGIST: JACK WATSON; 1994

End of report. Retrieved 5/3/2024 11:44:17 AM.

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